tdg-20260930

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K


☒			Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the fiscal year ended September 30, 2026


☐			Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from to

Commission File Number 001-32833

TransDigm Group Incorporated

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of incorporation or organization)

41-2101738

(I.R.S. Employer Identification No.)

1350 Euclid Avenue,

Suite 1600,

Cleveland,

Ohio

44115

(Address of principal executive offices)

(Zip Code)

(216) 706-2960

(Registrant’s telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report.)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class:

Trading Symbol:

Name of each exchange on which registered:

Common Stock, $0.01 par value

TDG

New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes x No ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer

☒

Accelerated Filer

☐

Non-Accelerated Filer

☐

Smaller Reporting Company

☐

Emerging Growth Company

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.

☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.

☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b).

☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No x

The aggregate market value of the voting and non-voting common stock held by non-affiliates of the registrant as of March 27, 2026, based upon the last sale price of such voting and non-voting common stock on that date, was $63,280,488,578.

The number of shares outstanding of TransDigm Group Incorporated’s common stock, par value $.01 per share, was 54,589,836 as of October 30, 2026.

Documents incorporated by reference: Certain sections of the registrant’s definitive Proxy Statement to be filed in connection with its 2027 Annual Meeting of Stockholders expected to be held on March 11, 2027 are incorporated by reference into Part III of this Annual Report on Form 10-K.

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		Page
PART I
ITEM 1	BUSINESS	1
ITEM 1A	RISK FACTORS	6
ITEM 1B	UNRESOLVED STAFF COMMENTS	14
ITEM 1C	CYBERSECURITY	15
ITEM 2	PROPERTIES	15
ITEM 3	LEGAL PROCEEDINGS	16
ITEM 4	MINE SAFETY DISCLOSURES	16
PART II
ITEM 5	MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES	16
ITEM 6	[RESERVED]	18
ITEM 7	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	19
ITEM 7A	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	36
ITEM 8	FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA	36
ITEM 9	CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE	36
ITEM 9A	CONTROLS AND PROCEDURES	37
ITEM 9B	OTHER INFORMATION	39
ITEM 9 C	DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS	39
PART III
ITEM 10	DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE	39
ITEM 11	EXECUTIVE COMPENSATION	40
ITEM 12	SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS	40
ITEM 13	CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE	41
ITEM 14	PRINCIPAL ACCOUNTANT FEES AND SERVICES	41
PART IV
ITEM 15	EXHIBITS AND FINANCIAL STATEMENT SCHEDULES	42
ITEM 1 6	FORM 10-K SUMMARY	54

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Special Note Regarding Forward-Looking Statements

This Annual Report on Form 10-K contains both historical and “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Section 27A of the Securities Act of 1933, as amended. All statements other than statements of historical fact included that address activities, events or developments that we expect, believe or anticipate will or may occur in the future are forward-looking statements, including, in particular, the statements about our plans, objectives, strategies and prospects regarding, among other things, our financial condition, results of operations and business. We have identified some of these forward-looking statements with words like “believe,” “may,” “will,” “should,” “expect,” “intend,” “plan,” “predict,” “anticipate,” “estimate” or “continue” and other words and terms of similar meaning. These forward-looking statements may be contained throughout this Annual Report on Form 10-K. These forward-looking statements are based on current expectations about future events affecting us and are subject to uncertainties and factors relating to, among other things, our operations and business environment, all of which are difficult to predict and many of which are beyond our control. Many factors mentioned in our discussion in this Annual Report on Form 10-K, including the risks outlined under “Risk Factors,” will be important in determining future results. Although we believe that the expectations reflected in these forward-looking statements are reasonable, we do not know whether our expectations will prove correct. They can be affected by inaccurate assumptions we might make or by known or unknown risks and uncertainties, including the risks outlined under “Risk Factors” in this Annual Report on Form 10-K. Since our actual results, performance or achievements could differ materially from those expressed in, or implied by, these forward-looking statements, we cannot give any assurance that any of the events anticipated by these forward-looking statements will occur or, if any of them does occur, what impact they will have on our business, results of operations and financial condition. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date they are made. We do not undertake any obligation to update these forward-looking statements or the risk factors contained in this Annual Report on Form 10-K to reflect new information, future events or otherwise, except as may be required under federal securities laws.

Important factors that could cause actual results to differ materially from the forward-looking statements made in this Annual Report on Form 10-K include, but are not limited to: the sensitivity of our business to the number of flight hours that our customers’ planes spend aloft and our customers’ profitability, both of which are affected by general economic conditions; supply chain constraints; increases in raw material costs, taxes and labor costs that cannot be recovered in product pricing; failure to complete or successfully integrate acquisitions; our indebtedness; repurchases of common stock; current and future geopolitical or other worldwide events, including, without limitation, wars or conflicts and public health crises; cybersecurity threats; risks related to the transition or physical impacts of climate change and other natural disasters or meeting regulatory requirements; our reliance on certain customers; the United States (“U.S.”) defense budget and risks associated with being a government supplier including government audits and investigations; failure to maintain government or industry approvals; risks related to changes in laws and regulations, including increases in compliance costs and potential changes in trade policies and tariffs; potential environmental liabilities; liabilities arising in connection with litigation; risks and costs associated with our international sales and operations; and other factors.

In this report, the term “TD Group” refers to TransDigm Group Incorporated, which holds all of the outstanding capital stock of TransDigm Inc. The terms “Company,” “TransDigm,” “we,” “us,” “our” and similar terms, unless the context otherwise requires, refer to TD Group, together with TransDigm Inc. and its wholly-owned and majority-owned subsidiaries for which it has a controlling interest. References to “fiscal year” mean the year ending or ended September 30. For example, “fiscal year 2026” or “fiscal 2026” means the period from October 1, 2025 to September 30, 2026.

PART I

ITEM 1. BUSINESS

The Company

TD Group, through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components that are critical to the safe and effective operation of nearly all commercial and military aircraft worldwide. Our products are represented in nearly every commercial and military aircraft in service today. Our business is well diversified due to the broad range of products we offer to our customers.

We believe our business strategy is built on the following key strengths: (1) a focus on proprietary products with significant aftermarket content, (2) successful execution of our value-driven operating strategy focused on our three core value drivers, (3) a decentralized organizational structure, (4) a disciplined acquisition strategy, and (5) an efficient capital structure.

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Proprietary Aerospace and Aftermarket. We estimate that approximately 90% of our net sales in fiscal year 2026 were generated by proprietary products. Most of our products generate significant aftermarket revenue. Once our parts are designed into and sold on a new aircraft, we generate net sales from aftermarket consumption over the life of that aircraft, which is generally estimated at 25 to 30 years. A typical platform is produced for 20 to 30 years, giving us an estimated product life cycle typically in excess of 50 years. We estimate that approximately 55% of our net sales in fiscal year 2026 were generated from the aftermarket, the vast majority of which came from the commercial and military aftermarkets. Historically, aftermarket revenues have produced higher gross margins and have been more stable than net sales to original equipment manufacturers (“OEMs”).

Value-Driven Operating Strategy. Our three core value drivers are:

•Obtaining Profitable New Business. We seek to obtain profitable new business by using our technical expertise and application skill and our detailed knowledge of our customer base and the individual niche markets in which we operate. We have regularly succeeded in identifying and developing both aftermarket and OEM products to drive our growth.

•Improving Our Cost Structure. We are committed to maintaining and continuously improving our lean cost structure through detailed attention to the cost of each of the products that we offer and our organizational structure, with a focus on reducing the cost of each.

•Providing Highly Engineered Value-Added Products to Customers. We focus on the engineering, manufacturing and marketing of a broad range of highly engineered niche products that we believe provide value to our customers. We believe we have been consistently successful in communicating to our customers the value of our products. This has generally enabled us to price our products to fairly reflect the value we provide and the resources required to do so.

Decentralized Organization. We operate through a decentralized organizational structure built around operating units that are grouped into our three segments: Power & Control, Airframe and Non-aviation. Our operating units have significant autonomy, and key operating decisions are made locally, closer to the customer, rather than at the corporate level.

Disciplined Acquisition Strategy. We maintain a disciplined acquisition strategy focused on proprietary commercial aerospace component businesses with significant aftermarket content, where we see a clear path to create value and earn private equity-like returns by applying our three core value drivers. Integrating acquired businesses into our existing operations and applying our operating strategy has historically improved the financial performance of the acquired businesses. Refer to Note 2, “Acquisitions,” in the notes to the consolidated financial statements included herein for information on the recent acquisitions.

Efficient Capital Structure. We believe that our consistently high levels of cash flow from operating activities support a capital structure that uses financial leverage to enhance stockholder returns. We have historically operated with higher leverage than many of our peers. We actively manage our debt profile and the timing of our capital deployment in pursuit of attractive returns for our stockholders. If we have excess cash, we generally prioritize allocating the excess cash in the following manner: (1) investing capital in existing businesses, (2) acquisitions of businesses, (3) payment of a special dividend and/or repurchases of our common stock and (4) prepayment of indebtedness or repurchase of debt.

Products

We primarily design, produce and supply highly engineered proprietary aerospace components with significant aftermarket content. We seek to develop highly customized products to solve specific needs for aircraft operators and manufacturers. We attempt to differentiate ourselves from our competitors by producing highly engineered products with high quality, reliability and timely delivery. Our proprietary products, and particularly our new product initiatives, are designed by our engineers and are intended to serve the needs of the aircraft component industry. These proprietary designs must withstand the extraordinary conditions and stresses that will be endured by products during use and meet the rigorous demands of our customers’ tolerance and quality requirements. Our portfolio of products encompasses a vast array of essential components that play pivotal roles on commercial aerospace and defense platforms, as well as other products. For example, TransDigm’s operating units make aircraft seatbelts and cockpit security systems that keep passengers and pilots safe; parachutes that protect military personnel; and specialized equipment for the National Aeronautics and Space Administration’s (“NASA”) space telescopes, aiding in space exploration and scientific advancement.

Our engineering costs are recorded in cost of sales and in selling and administrative expenses within our consolidated statements of income. Research and development costs are recorded in selling and administrative expenses within our consolidated statements of income. Refer to Note 1, “Summary of Significant Accounting Policies,” in the notes to the consolidated financial statements included herein with respect to the total costs of research and development.

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Segments

The Company’s businesses are organized and managed in three reportable segments: Power & Control, Airframe and Non-aviation.

The Power & Control segment includes operations that primarily develop, produce and market systems and components that predominately provide power to or control power of the aircraft utilizing electronic, fluid, power and mechanical motion control technologies. Major product offerings include mechanical/electromechanical actuators and controls, ignition systems and engine technology, specialized pumps and valves, power conditioning devices, specialized AC/DC electric motors and generators, batteries and chargers, databus and power controls, advanced sensor products, switches and relay panels, high performance hoists, winches and lifting devices, cargo loading, handling and delivery systems, brazing alloys and specialty metal components, electronic components used in the generation, amplification, transmission and reception of microwave signals, and single and two-stage servo valves. Primary customers of this segment are engine and power system and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.

The Airframe segment includes operations that primarily develop, produce and market systems and components that are used in non-power airframe applications utilizing airframe and cabin structure technologies. Major product offerings include engineered latching and locking devices, engineered rods, engineered connectors and elastomer sealing solutions, cockpit security components and systems, specialized and advanced cockpit displays, engineered audio, radio and antenna systems, specialized lavatory components, seat belts and safety restraints, engineered and customized interior surfaces and related components, thermal protection and insulation, lighting and control technology, parachutes, specialized flight, wind tunnel and jet engine testing services and equipment and complex testing and instrumentation solutions. Primary customers of this segment are airframe manufacturers and cabin system suppliers and subsystem suppliers, airlines, third party maintenance suppliers, military buying agencies and repair depots. Products are sold in the original equipment and aftermarket market channels.

The Non-aviation segment includes operations that primarily develop, produce and market products for non-aviation markets. Major product offerings include seat belts and safety restraints for ground transportation applications, mechanical/electromechanical actuators and controls for space applications, hydraulic/electromechanical actuators and fuel valves for land-based gas turbines, and refueling systems for heavy equipment used in mining, construction and other industries, and turbine controls for the energy and oil and gas markets. Primary customers of this segment are off-road vehicle suppliers and subsystem suppliers, child restraint system suppliers, satellite and space system suppliers, manufacturers of heavy equipment used in mining, construction and other industries and turbine original equipment manufacturers, gas pipeline builders and electric utilities.

For financial information about our segments, refer to Note 15, “Segments,” in the notes to the consolidated financial statements included herein.

Customers

We predominantly serve customers in the commercial, regional, business jet and general aviation aftermarket, which generally account for 30% to 35% of our annual net sales; the commercial aerospace OEM market, comprising large commercial transport manufacturers and regional and business jet manufacturers, which generally account for 25% to 30% of our annual net sales; and the defense market (which includes defense OEMs and aftermarket sales to the U.S. and friendly foreign governments), which generally account for approximately 35% to 40% of our annual net sales.

Our customers include: (1) distributors of aerospace components; (2) worldwide commercial airlines, including national and regional airlines; (3) large commercial transport and regional and business aircraft OEMs; (4) various armed forces of the United States and friendly foreign governments; (5) defense OEMs; (6) system suppliers; and (7) various other industrial customers. Our top ten customers for fiscal year 2026 accounted for approximately 45% of our net sales, up from 40% in fiscal 2025. Products supplied to many of our customers are used on multiple platforms. None of our customers individually accounted for greater than 10% of our net sales for fiscal year 2026. We believe that our diversified revenue base reduces our dependence on any particular product, platform or market channel and has been a significant factor in maintaining our financial performance.

Competition

The niche markets within the aerospace industry that we serve are relatively fragmented and we face several competitors for many of the products and services we provide. Due to the global nature of the commercial aircraft industry, competition in these categories comes from both U.S. and foreign companies. Competitors in our product offerings range in size from divisions of large public corporations to small privately-held entities with only one or two components in their entire product portfolios.

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We compete on the basis of engineering, manufacturing and marketing high quality and reliable products, which we believe meet or exceed the performance and maintenance requirements of our customers, consistent and timely delivery, and superior customer service and support. The industry’s stringent regulatory, certification and technical requirements and the investments necessary in the development and certification of products may create disincentives for potential new competitors for certain products. If customers receive products that meet or exceed expectations and performance standards, we believe that they will have a reduced incentive to certify another supplier because of the cost and time of the technical design and testing certification process. In addition, we believe that the availability, dependability and safety of our products are reasons for our customers to continue long-term supplier relationships.

Governmental Regulations

The commercial aircraft component industry is highly regulated by the Federal Aviation Administration (“FAA”) in the United States and by the European Union Aviation Safety Agency in Europe and other agencies throughout the world, while the military aircraft component industry is governed by military quality specifications. We, and the components we manufacture, are required to be certified by one or more of these entities or agencies, and, in many cases, by individual OEMs, in order to engineer and service parts and components used in specific aircraft models.

We must also satisfy the requirements of our customers, including OEMs and airlines that are subject to FAA regulations, and provide these customers with products and services that comply with the government regulations applicable to commercial flight operations. In addition, the FAA and other aviation authorities require that various maintenance routines be performed on aircraft components. We believe that we currently satisfy or exceed these maintenance standards in our repair and overhaul services. We also maintain several FAA-approved repair stations.

In addition, our businesses are subject to many other laws and requirements typically applicable to manufacturers and exporters. Without limiting the foregoing, sales of many of our products that will be used on aircraft owned by foreign entities are subject to compliance with export control laws and the manufacture of our products and the operations of our businesses, including the disposal of hazardous wastes, are subject to compliance with applicable environmental laws.

Refer to Item 1A. “Risk Factors” for additional information about the impact of government regulations on our business.

Raw Materials

We require the use of various raw materials in our manufacturing processes. We purchase a variety of manufactured component parts from various suppliers. We also purchase replacement parts, which are utilized in our various repair and overhaul operations. At times, we concentrate our orders among a few suppliers in order to strengthen our supplier relationships. Most of our raw materials and component parts are generally available from multiple suppliers at competitive prices.

Intellectual Property

We have various trade secrets, proprietary information, trademarks, trade names, patents, copyrights and other intellectual property rights, which we believe, in the aggregate but not individually, are important to our business. The Company's products are manufactured, marketed and sold using a portfolio of patents, trademarks, licenses, and other forms of intellectual property, some of which expire in the future. The Company develops and acquires new intellectual property on an ongoing basis. Based on the broad scope of the Company’s product lines, management believes that the loss or expiration of any single intellectual property right would not have a material effect on our consolidated financial statements.

Environmental Matters

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. Certain facilities and third-party sites utilized by the Company have been identified as potentially responsible parties under the federal superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

For information regarding environmental reserves, refer to Note 13, “Commitments and Contingencies,” in the notes to the consolidated financial statements included herein. Compliance with federal, state, local and foreign environmental laws during fiscal 2026 did not have a material impact on our capital expenditures, results of operations or cash flows. Based upon consideration of currently available information, we believe liabilities for environmental matters will not have a material adverse impact on our consolidated financial statements, but we cannot assure that material environmental liabilities will not arise in the future. For further information on environmental-related risks, including climate change, refer to Item 1A. “Risk Factors.”

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Human Capital Resources

As of September 30, 2026, we had approximately 19,100 full-time, part-time and temporary employees. Approximately 17% of our full-time and part-time employees are represented by labor unions. Collective bargaining agreements between us and these labor unions expire at various dates up to September 2029.

The development, attraction and retention of employees, and succession planning, are critical to our operating units and to sustaining our three core value drivers (obtaining profitable new business, continually improving our cost structure and providing highly engineered value-added products to customers). To support these objectives, we maintain development programs such as TransDigm University; recruiting programs such as the Management Development Program, which recruits recent master’s program graduates, and the Junior Military Officer Program, which recruits U.S. military veterans; and tuition reimbursement and local college training partnerships at some operating units. Our executive team also dedicates substantial time to mentoring rising talent and assessing our pool of future leaders.

We offer competitive compensation and benefits, including base pay, bonus programs, equity awards, retirement savings plans, health and wellness programs and paid time off, and we believe these programs fairly reward our employees.

At TransDigm, we highly value the contributions of diverse perspectives, fresh ideas and varied experiences. Our commitment to diversity and inclusiveness is more than just an organizational goal; it is a fundamental principle that drives innovation, enhances our competitive edge and ultimately leads to better outcomes for all stakeholders. To gauge our progress, we annually review and assess our diversity initiatives and metrics.

Discrimination is not tolerated at TransDigm. We are committed to high ethical standards and equal employment opportunities in all personnel actions without regard to race, color, religion, gender, national origin, citizenship status, age, marital status, gender identity or expression, sexual orientation, physical or mental disability, or veteran status.

We emphasize process safety and risk mitigation at our facilities. We require our personnel to report risks, hazards, incidents and near misses so that we can investigate them and take preventive measures, and each operating unit reports environmental, health and safety matters to our executive team monthly.

Seasonality

We do not believe our net sales are subject to significant seasonal variation; however, our net sales have generally been lower in the first quarter of our fiscal year compared to the subsequent quarters due to fewer working days resulting from the observance of various holidays.

Available Information

TD Group’s Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, including any amendments, will be made available free of charge on the Company’s website, www.transdigm.com, as soon as reasonably practicable, following the filing of the reports with the Securities and Exchange Commission (“SEC”). In addition, the Company’s website allows investors and other interested persons to sign up to automatically receive e-mail alerts when news releases and financial information is posted on the website. The SEC also maintains a website, www.sec.gov, that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC. The information on or obtainable through our website is not incorporated into this Annual Report on Form 10-K.

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ITEM 1A. RISK FACTORS

Below are material risks and uncertainties that could negatively affect our business and financial condition and could cause our actual results to differ materially from those expressed in forward-looking statements contained in this report. Additional risks and uncertainties not presently known to us or that we currently deem immaterial also may impair our business operations and financial condition. You should not interpret the disclosure of any risk factor to imply that the risk has not already materialized.

Risks Related to our Strategy

Our business focuses almost exclusively on the aerospace and defense industry.

A period of significant market disruption in the aerospace and defense industry, or other macroeconomic factors, may disproportionately disrupt our business compared to more diversified peer companies.

We may rely heavily on certain customers for much of our sales.

Our top ten customers for fiscal year 2026 accounted for approximately 45% of our net sales. A material reduction in purchasing by one of our larger customers for any reason, including but not limited to general economic or aerospace downturns, decreased production, strike or resourcing, could have a material adverse effect on results of operations, financial position and cash flows.

We generally do not have guaranteed future sales of our products. Further, when we enter into fixed price contracts with some of our customers, we take the risk for cost overruns.

As is customary in our business, we do not generally have long-term contracts with most of our aftermarket customers and, therefore, do not have guaranteed future sales. Although we have long-term contracts with many of our OEM customers, many of those customers may terminate the contracts on short notice and, in most cases, our customers have not committed to buy any minimum quantity of our products. In addition, in certain cases, we must anticipate the future volume of orders based upon the historic purchasing patterns of customers and upon our discussions with customers as to their anticipated future requirements, and this anticipated future volume of orders may not materialize.

We also have entered into multi-year, fixed-price contracts with some of our customers, pursuant to which we have agreed to perform the work at a fixed price and, accordingly, realize all the benefit or detriment resulting from any decreases or increases in the costs of making these products. This risk is greater in a high inflationary environment. Sometimes we accept a fixed-price contract for a product that we have not previously produced, and this may increase the risk of cost overruns or delays in the completion of the design and manufacturing of the product. Most of our contracts do not permit us to recover increases in raw material prices, taxes or labor costs. Furthermore, entering into fixed-price contracts with the United States Government (“U.S. Government”), particularly for small-quantity or spot purchases made without reliable forecasts, exposes us to the risk of cost overruns and reduced margins if production costs increase or economies of scale cannot be achieved.

We intend to pursue acquisitions. Our business may be adversely affected if we cannot consummate acquisitions on satisfactory terms, or if we cannot effectively integrate acquired operations.

A significant portion of our growth has occurred through acquisitions. Future growth through acquisitions will be partially dependent upon the continued availability of suitable acquisition candidates at favorable prices and upon advantageous terms and conditions. We intend to pursue acquisitions that we believe will present opportunities consistent with our overall business strategy. However, we may not be able to find suitable acquisition candidates to purchase or may be unable to acquire desired businesses or assets on economically acceptable terms or may be unable to receive necessary regulatory approvals or support. Regulators may also require significant concessions or impose conditions that have resulted, and could in the future result, in significant costs or force us to abandon proposed transactions. In addition, we may not be able to raise the capital necessary to fund future acquisitions. Because we may actively pursue multiple opportunities simultaneously, we may encounter unforeseen expenses, complications and delays, including regulatory complications or difficulties in employing sufficient staff and maintaining operational and management oversight.

We regularly engage in discussions with respect to potential acquisition and investment opportunities. If we consummate an acquisition, our capitalization and results of operations may change significantly. Future acquisitions could result in margin dilution and further likely result in the incurrence of additional debt and contingent liabilities and an increase in interest and amortization expenses or periodic impairment charges related to goodwill and other intangible assets as well as significant charges relating to integration costs.

Acquisitions involve risks that the businesses acquired will not perform in accordance with expectations and that business judgments concerning the value, strengths and weaknesses of businesses acquired will prove incorrect. In addition, we may not be able to successfully integrate any business we acquire into our existing business. The successful integration of new businesses depends on our ability to manage these new businesses and cut excess costs. The successful integration of future acquisitions may also require substantial attention from our senior management and the management of the acquired business, which could decrease the time that they have to service, attract customers and develop new products and services or attend to other acquisition opportunities.

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Our indebtedness could adversely affect our financial health and could harm our ability to react to changes to our business and prevent us from fulfilling our obligations under our indebtedness.

We have a significant amount of indebtedness and may incur substantial additional indebtedness in the future. Although our senior secured credit facility and the indentures governing the various series of senior secured and senior subordinated notes outstanding (the “Notes”) contain restrictions on the incurrence of additional indebtedness, these restrictions are subject to a number of significant qualifications and exceptions, and the indebtedness incurred in compliance with these qualifications and exceptions could be substantial. A breach of any of the covenants or an inability to comply with the required leverage ratio could result in a default under the senior secured credit facility or the indentures.

An increase in our indebtedness could also have other important consequences to investors. For example, it could:

•increase our vulnerability to general economic downturns and adverse competitive and industry conditions;

•increase the risk we are subjected to downgrade or put on a negative watch by the ratings agencies;

•require us to dedicate a substantial portion of our cash flows from operations to payments on our indebtedness, thereby reducing the availability of our cash flow to fund working capital requirements, capital expenditures, acquisitions, research and development efforts and other general corporate requirements;

•limit our flexibility in planning for, or reacting to, changes in our business and the industry in which we operate;

•place us at a competitive disadvantage compared to competitors that have less debt; and

•limit, along with the financial and other restrictive covenants contained in the documents governing our indebtedness, among other things, our ability to borrow additional funds, make investments and incur liens.

All of the term loans under our term loan facility and the trade receivable securitization facility (the “Securitization Facility”) bear interest at variable rates based on the Term Secured Overnight Financing Rate (“Term SOFR”). Accordingly, if Term SOFR increases, our debt service expense will also increase. In order to mitigate the interest rate risk of these variable rate borrowings, we enter into interest rate swap and collar agreements that cover a significant portion of the existing variable rate debt and may continue to do so in the future, subject to market and other conditions.

Our indebtedness increases the possibility that we may be unable to generate cash sufficient to pay, when due, the principal of, interest on or other amounts due in respect of our indebtedness, including debt under the senior secured credit facility and the Notes. We cannot assure that our business will generate sufficient cash flow from operations or that future borrowings will be available to us under the senior secured credit facility or otherwise in amounts sufficient to enable us to service our indebtedness. If we cannot service our debt, we will have to take actions such as reducing or delaying capital investments, selling assets, restructuring or refinancing our debt or seeking additional equity capital.

To service our indebtedness, we will require a significant amount of cash. Our ability to generate cash depends on many factors beyond our control and any failure to meet our debt service obligations could harm our business, financial condition and results of operations.

Our ability to make payments on and to refinance our indebtedness, including the Notes, amounts borrowed under the senior secured credit facility, amounts due under our Securitization Facility, and to fund our operations, will depend on our ability to generate cash in the future, which, to a certain extent, is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control.

We cannot assure that our business will generate sufficient cash flow from operations, or that future borrowings will be available to us under the senior secured credit facility or otherwise in amounts sufficient to enable us to service our indebtedness, including the amounts borrowed under the senior secured credit facility, amounts borrowed under our Securitization Facility and the Notes, or to fund our other liquidity needs. If we cannot service our debt, we will have to take actions such as reducing or delaying capital investments, selling assets, restructuring or refinancing our debt or seeking additional equity capital. We cannot assure that any of these remedies could, if necessary, be effected on commercially reasonable terms, or at all. Our ability to restructure or refinance our debt will depend on the condition of the capital markets and our financial condition at such time. Any refinancing of our debt could be at higher interest rates and may require us to comply with more onerous covenants, which could further restrict our business operations. The terms of existing or future debt instruments, the Securitization Facility, the indentures governing the Notes and the senior secured credit facility may restrict us from adopting any of these alternatives. In addition, any failure to make payments of interest and principal on our outstanding indebtedness on a timely basis would likely result in a reduction of our credit rating, which could harm our ability to incur additional indebtedness on acceptable terms and could otherwise adversely affect our business, financial condition and results of operations.

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The terms of the senior secured credit facility and indentures governing the Notes may restrict our current and future operations, particularly our ability to respond to changes or to take certain actions.

Our senior secured credit facility and the indentures governing the Notes contain a number of restrictive covenants that impose significant operating and financial restrictions on TD Group, TransDigm Inc. and its restricted subsidiaries (in the case of the senior secured credit facility) and TransDigm Inc. and its restricted subsidiaries (in the case of the indentures) and may limit their ability to engage in acts that may be in our long-term best interests. The senior secured credit facility and indentures governing the Notes include covenants restricting, among other things, the ability to (subject, in each case, to certain important exceptions):

•incur or guarantee additional indebtedness or issue preferred stock;

•pay distributions on, redeem or repurchase our capital stock, or redeem or repurchase our subordinated debt;

•make investments;

•sell assets;

•enter into agreements that restrict distributions or other payments from our restricted subsidiaries to us;

•incur or allow to exist liens;

•consolidate, merge or transfer all or substantially all of our assets;

•engage in transactions with affiliates;

•create unrestricted subsidiaries; and

•engage in certain business activities.

A breach of any of these covenants could result in a default under the senior secured credit facility or the indentures governing the Notes. If any such default occurs, the lenders under the senior secured credit facility and the holders of the Notes may elect to declare all outstanding borrowings, together with accrued interest and other amounts payable thereunder, to be immediately due and payable. The lenders under the senior secured credit facility also have the right in these circumstances to terminate any commitments they have to provide further borrowings. In addition, subject to the terms of an intercreditor agreement, following an event of default under the senior secured credit facility or the indentures governing our various series of outstanding senior secured notes, the lenders thereunder or the holders thereof, as applicable, will have the right to proceed against the collateral granted to them to secure the debt, which includes our available cash, and they will also have the right to prevent us from making debt service payments on the senior subordinated notes. If the debt under the senior secured credit facility or the Notes were to be accelerated, we cannot assure that our assets would be sufficient to repay in full the Notes and other debt.

We are dependent on our executive officers, senior management team and highly trained employees and any work stoppage, difficulty hiring similar employees, or ineffective succession planning could adversely affect our business.

Because our products are complicated and highly engineered, we depend on an educated and trained workforce. Historically, there has been substantial competition for skilled personnel in the aerospace and defense industry, and we could be adversely affected by a shortage of skilled employees. We may not be able to fill new positions or vacancies created by expansion or turnover or attract and retain qualified personnel. We cannot be assured that we can continue to hire, train and retain qualified employees at current wage rates since we operate in a competitive labor market, and there may be pressures on wages.

Although we believe that our relations with our employees are satisfactory, we cannot assure that we will be able to negotiate a satisfactory renewal of collective bargaining agreements or that our employee relations will remain stable. Because we strive to limit the volume of finished goods inventory, any work stoppage could materially and adversely affect our ability to provide products to our customers.

In addition, our success depends in part on our ability to attract and motivate our senior management and key employees. Achieving this objective may be difficult due to a variety of factors, including fluctuations in economic and industry conditions, competitors’ hiring practices, and the effectiveness of our compensation programs. Competition for qualified personnel can be intense. If we are unable to effectively provide for the succession of key personnel, senior management and our executive officers, including our President and Chief Executive Officer, our business, results of operations, cash flows and financial condition may be adversely affected.

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Public health crises, and health pandemics, epidemics and outbreaks could adversely affect our business.

A significant public health crisis could cause disruption to our operations. Our ability to predict and respond to future changes resulting from potential health crises is uncertain. Even after a public health crisis subsides, there may be long-term effects on our business practices and customers in economies in which we operate that could severely disrupt our operations and could have a material adverse effect on our business, results of operations, cash flows and financial condition. As we cannot predict the duration, scope or severity of future public health crises, the negative financial impact to our results cannot be reasonably estimated and could be material.

Risks Related to our Operations

Our sales to manufacturers of aircraft are cyclical, and a downturn in sales to these manufacturers may adversely affect us.

Our sales to manufacturers of large commercial aircraft, such as Boeing, Airbus, and related OEM suppliers, as well as manufacturers of business jets have historically experienced periodic downturns. In the past, these sales have been affected by airline profitability, which is impacted by, among other things, fuel and labor costs, price competition, interest rates, downturns in the global economy and national and international events. In addition, sales of our products to manufacturers of business jets are impacted by, among other things, downturns in the global economy. Significant labor disagreements and supply chain issues may also negatively impact the production of aircraft. Downturns adversely affect our results of operations, financial position and cash flows.

Our business is dependent on the availability of certain components and raw materials from suppliers.

Our business is affected by the price and availability of the raw materials and component parts that we use to manufacture our components. Our business, therefore, could be adversely impacted by factors affecting our suppliers (such as the destruction of our suppliers’ facilities or their distribution infrastructure, a work stoppage or strike by our suppliers’ employees or the failure of our suppliers to provide materials of the requisite quality), or by increased costs of such raw materials or components if we were unable to pass along such price increases to our customers. Changes to tariff and import and export regulations in the United States and abroad have, and may also continue to, negatively impact the availability and pricing of raw materials.

Because we strive to limit the volume of raw materials and component parts on hand, our business could be adversely affected if we were unable to obtain these raw materials and components from our suppliers in the quantities we require or on favorable terms. Although we believe in most cases that we could identify alternative suppliers, or alternative raw materials or component parts, the lengthy and expensive aviation authority and OEM certification processes associated with aerospace products could prevent efficient replacement of a supplier, raw material or component part.

We face significant competition.

We operate in a highly competitive global industry and compete against a number of companies. Competitors in our product lines are both U.S. and foreign companies and range in size from divisions of large public corporations to small privately-held entities. We believe that our ability to compete depends on high product performance, consistent high quality, short lead-time and timely delivery, competitive pricing, superior customer service and support and continued certification under customer quality requirements and assurance programs. We adjust the prices of some of our products from time to time to stay competitive.

Climate-related regulations designed to address climate change may result in additional compliance costs.

Our operations and the products we sell are currently subject to rules limiting emissions and to other climate-related regulations in certain jurisdictions where we operate. Changes in environmental and climate-related laws or regulations on greenhouse gas emissions may negatively impact us, our suppliers and customers. We cannot predict what environmental legislation or regulations will be enacted in the future, how existing or future laws or regulations will be administered or interpreted, or what environmental conditions may be found to exist. Compliance with any new or more stringent laws or regulations, or stricter interpretations of existing laws, could require additional expenditures by us or our suppliers, in which case, the costs of raw materials and component parts could increase.

Regulation that would have a material adverse impact on air travel could also have a material adverse impact on our business. Given the uncertainty around these issues, we cannot predict how future legislation will affect our operations and financial condition.

Our operations depend on our manufacturing facilities, which are subject to physical and other risks that could disrupt production.

Our operations and those of our customers and suppliers have been and may again be subject to natural disasters, climate change-related events, pandemics or other business disruptions, which could seriously harm our results of operations and increase our costs and expenses. Some of our manufacturing facilities are located in regions that may be impacted by severe weather events, such as increased storm frequency or severity in the Atlantic and fires in hotter and drier climates. These could result in potential damage to our physical assets as well as disruptions in manufacturing activities. Some of our manufacturing facilities are located in areas that may be at risk due to rising sea levels. Moreover, some of our manufacturing facilities are located in areas that could experience decreased access to water due to climate issues.

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We are also vulnerable to damage from other types of disasters, including power loss, fire, explosions, floods, communications failures, terrorist attacks and similar events. Disruptions could also occur due to health-related outbreaks and crises, cyber-attacks, computer or equipment malfunction (accidental or intentional), operator error or process failures. Should insurance or other risk transfer mechanisms, such as our existing disaster recovery and business continuity plans, be insufficient to recover all costs, we could experience a material adverse effect on our business, results of operations, financial position and cash flows.

Operations and sales outside of the United States may be subject to additional risks.

Our net sales to foreign customers were $3,698 million for the fiscal year ended September 30, 2026. A number of risks inherent in international operations could have a material adverse effect on our results of operations, including war, sanctions, global health crises, currency fluctuations, difficulties in staffing and managing multinational operations, general economic and political uncertainties and potential for social unrest in countries in which we operate, limitations on our ability to enforce legal rights and remedies, restrictions on the repatriation of funds, change in trade policies, tariff regulation, difficulties in obtaining export and import licenses and the risk of government financed competition.

Issues with the global supply chain arise due to some of the aforementioned risks, as well as the availability and cost of raw materials to suppliers, merchandise quality or safety issues, shipping and transport availability and cost, increases in wage rates and taxes, transport security, inflation and other factors relating to the suppliers and the countries in which they are located or from which they import. Such issues are often beyond our control and could adversely affect our operations and profitability. Furthermore, the Company is subject to foreign and domestic laws and regulations, which generally prohibit companies and their employees, agents and contractors from making improper payments for the purpose of obtaining or retaining business. Failure to comply with these laws could subject the Company to civil and criminal penalties that could materially adversely affect the Company’s results of operations, financial position and cash flows.

We continue to monitor the ongoing geopolitical conflicts, including the conflict involving Iran and Russia’s invasion of Ukraine, and the related export controls and financial and economic sanctions imposed on certain industry sectors, including the aviation sector, and parties in Russia and Iran by the U.S., the U.K., the European Union and others. The implications of these conflicts in the short-term and long-term are difficult to predict. Factors such as increased energy costs, disruptions to shipping and energy supply routes, the availability of certain raw materials for aircraft manufacturers, embargoes on flights from certain airlines, sanctions on certain companies, and the stability of certain customers could impact the global economy and aviation sector.

We are subject to certain unique business risks as a result of supplying equipment and services to the U.S. Government.

Companies engaged in supplying defense-related equipment and services to U.S. Government agencies, whether through direct contracts with the U.S. Government or as a subcontractor to customers contracting with the U.S. Government, are subject to business risks specific to the defense industry. These risks include the ability of the U.S. Government to unilaterally:

•suspend or debar us from receiving new contracts based on alleged violations of procurement laws or regulations;

•terminate existing contracts;

•revoke required security clearances; and

•audit contract-related costs and fees, including allocated indirect costs.

U.S. Government contracts can be terminated by the U.S. Government at its convenience without cause or significant notice. Termination for convenience provisions provide only for recovery of costs incurred or committed, settlement expenses and profit on the work completed prior to termination.

Most of our U.S. Government contracts are based on a firm-fixed price where we take the risk of cost overruns. On contracts for which the price is not fixed but rather based on the reimbursement of costs, the U.S. Government may review incurred costs and performance, as well as our accounting and general business practices. Based on the results of such audits, the U.S. Government may adjust the reimbursement of contract-related costs and fees, including allocated indirect costs. In addition, under U.S. Government purchasing regulations, some of our costs, including most financing costs, amortization of intangible assets, portions of research and development costs, and certain marketing expenses may not be subject to reimbursement under cost-reimbursement contracts.

Furthermore, even where the price is not based on cost, the U.S. Government may seek to review costs to determine whether our pricing is “fair and reasonable.” Our subsidiaries are periodically subject to pricing reviews and government buying agencies that purchase some of our subsidiaries’ products are periodically subject to audits by the U.S. Department of War (“DOW”) with respect to prices paid for such products. As a result of these audits, we could be asked to enter into an arrangement whereby our prices would be based on costs approved by the auditor, plus a nominal fee, the DOW could seek to pursue alternative sources of supply for our parts, or the U.S. Government could take other adverse actions with respect to our contracts. Any of those occurrences could lead to a reduction in our revenue from, or the profitability of certain of our supply arrangements with, certain agencies and buying organizations of the U.S. Government. Further, negative publicity relating to the results of any audit, inquiry or subsequent hearing or the like could negatively impact our stock price.

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If a government inquiry or investigation alleges improper or illegal activities, we could be subject to civil or criminal penalties or administrative sanctions, including contract termination, fines, forfeiture of fees, suspension of payment and suspension or debarment from doing business with U.S. Government agencies, any of which could materially adversely affect our reputation, business, financial condition, results of operations and cash flows.

Moreover, U.S. Government purchasing regulations contain many additional operational requirements, which do not apply to entities not engaged in government contracting. Failure to comply with such government contracting requirements could result in civil and criminal penalties that could have a material adverse effect on the Company’s results of operations.

Our business may be adversely affected if we lose our government or industry approvals or if more stringent government regulations are enacted or if industry oversight is increased.

The aerospace industry is highly regulated in the U.S. and in other countries. In order to sell our products, we and the products we manufacture must be certified by the FAA, the DOW and similar agencies in foreign countries and by individual manufacturers. If new and more stringent government regulations are adopted or if industry oversight increases, we might incur significant expenses to comply with any new regulations or heightened industry oversight. In addition, if material authorizations or approvals were revoked or suspended, our business would be adversely affected.

In addition to the aviation approvals, we are at times required to obtain approval from U.S. Government agencies and similar agencies elsewhere in the world to export our products. U.S. laws and regulations applicable to us include the Arms Export Control Act, the International Traffic in Arms Regulations (“ITAR”), the Export Administration Regulations (“EAR”) and the trade sanctions laws and regulations administered by the United States Department of the Treasury's Office of Foreign Assets Control (“OFAC”). EAR restricts the export of commercial and dual-use products and technical data to certain countries, while ITAR restricts the export of defense products, technical data and defense services.

Failure to obtain approval to export or determination by the U.S. Government or similar agencies elsewhere in the world that we failed to receive required approvals or licenses could eliminate or restrict our ability to sell our products outside the United States or other country of origin, and the penalties that could be imposed by the U.S. Government or other applicable government for failure to comply with these laws could be significant.

We could incur substantial costs as a result of data protection concerns.

The interpretation and application of data protection laws in the U.S. and globally including, but not limited to, the General Data Protection Regulation, are uncertain and evolving. It is possible that these laws may be interpreted and applied in a manner that is inconsistent with our data practices. Complying with these various laws is difficult and could cause us to incur substantial costs or require us to change our business practices in a manner adverse to our business. Further, although we have implemented internal controls and procedures designed to ensure compliance with the various privacy-related laws, rules and regulations, there can be no assurance that our controls and procedures will enable us to be fully compliant with all data protection laws. The rapid evolution and increased adoption of artificial intelligence (“AI”) technologies may intensify these risks. Any failure to comply could result in significant penalties, fines, legal challenges and reputational harm.

Increased cybersecurity threats and more sophisticated and targeted computer crime have posed and could continue to pose a risk to our and certain third parties’ information technology systems and a disruption to or breach in the security of such systems, if material, could have adverse effects on our results of operations and financial condition.

We rely extensively on information technology systems to manage and operate our business, some of which are managed by third parties. The security and functionality of these information technology systems, and the processing of data by these systems, are critical to our business operations. If these systems, or any part of the systems, are damaged, intruded upon, attacked, shutdown or cease to function properly (whether by planned upgrades, force majeure, telecommunications failures, criminal acts, including hardware or software break-ins, ransomware attacks or extortion attempts, or viruses, or other cybersecurity incidents) and we suffer any resulting interruption in our ability to manage and operate our business or if our products are affected, our results of operations and financial condition could be materially adversely affected. In fact, we have experienced data security incidents, although these have not had a material impact on our financial results. Furthermore, the Company has access to classified, sensitive, confidential, proprietary, or personal data or information that is subject to privacy and security laws, regulations, or other contractually-imposed controls.

The risks in this area continue to grow, and we expect cyber events will continue to accelerate in frequency and impact as threat actors increasingly use AI and other techniques to circumvent security controls, evade detection and remove forensic evidence.

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Despite our use of reasonable and appropriate technical security controls and monitoring, security breaches, theft, misplaced, lost or corrupted data, programming, or employee errors and/or malfeasance have led and could in the future lead to the compromise or improper use of such sensitive, confidential, proprietary, or personal data or information. Such events may result in possible negative consequences, such as disruption to our business operations, loss of proprietary information, ransom demands, loss of revenue, penalties, failure to comply with laws governing sensitive data, government enforcement, litigation or regulatory proceedings, negative publicity, loss of reputation, loss of intellectual property, loss of competitiveness or customers, increased security and compliance costs or other negative consequences. Further, the amount of insurance coverage that we maintain may be inadequate to cover claims or liabilities relating to a cybersecurity incident. Depending on the nature and magnitude of these events, they may have an adverse impact on our results of operations or financial condition.

Risks Related to Legal and Regulatory Matters

We could incur substantial costs as a result of violations of or liabilities under environmental laws and regulations.

Our operations and facilities are subject to a number of federal, state, local and foreign environmental laws and regulations that govern, among other things, discharges of pollutants into the air and water, the generation, handling, storage and disposal of hazardous materials and wastes, the remediation of contamination and the health and safety of our employees. Environmental laws and regulations may require that the Company investigate and remediate the effects of the release or disposal of materials at sites associated with past and present operations. Certain facilities and third-party sites utilized by subsidiaries of the Company have been identified as potentially responsible parties under the federal superfund laws and comparable state laws. The Company is currently involved in the investigation and remediation of a number of sites under applicable laws.

Estimates of the Company’s environmental liabilities are based on current facts, laws, regulations and technology. These estimates take into consideration the Company’s prior experience and professional judgment of the Company’s environmental advisors. Estimates of the Company’s environmental liabilities are further subject to uncertainties regarding the nature and extent of site contamination, the range of remediation alternatives available, evolving remediation standards, imprecise engineering evaluations and cost estimates, the extent of corrective actions that may be required and the number and financial condition of other potentially responsible parties, as well as the extent of their responsibility for the remediation.

Accordingly, as investigations and remediations proceed, it is likely that adjustments in the Company’s accruals will be necessary to reflect new information. The amounts of any such adjustments could have a material adverse effect on the Company’s results of operations or cash flows in a given period.

We may be subject to periodic litigation and regulatory proceedings, which may adversely affect our business and financial performance.

Our business is subject to regulation under a variety of U.S. federal and state and non-U.S. laws, regulations and policies that require ongoing compliance efforts. From time to time, we are involved in lawsuits and regulatory actions brought or threatened against us in the ordinary course of business. These actions and proceedings may involve claims for, among other things, compensation for alleged personal injury, workers’ compensation, employment discrimination, financial improprieties or breach of contract. In addition, we may be subject to class action lawsuits, including those involving allegations of violations of consumer product statutes or the Fair Labor Standards Act and state wage and hour laws. Due to the inherent uncertainties of litigation, we cannot accurately predict the ultimate outcome of any such actions or proceedings. The outcome of litigation, particularly class action lawsuits and regulatory actions, is difficult to assess or quantify, as plaintiffs may seek recovery of very large or indeterminate amounts in these types of lawsuits, and the magnitude of the potential loss may remain unknown for substantial periods of time. In addition, plaintiffs in many types of actions may seek punitive damages, civil penalties, consequential damages or other losses, or injunctive or declaratory relief. These proceedings could result in substantial cost and may require us to devote substantial resources to defend ourselves. The ultimate resolution of these matters through settlement, mediation, or court judgment could have a material impact on our financial condition, results of operations, and cash flows.

We could be adversely affected by the impact of failure, misuse or quality issues of our products.

We produce highly engineered aircraft components, and accordingly, the adverse impact of product quality issues, actual or perceived, can be significant. Our operations expose us to potential liabilities for personal injury or death as a result of the failure of an aircraft product that we have designed, manufactured or serviced. While we maintain liability insurance to protect us from future product liability claims, in the event of product liability claims our insurers may attempt to deny coverage or any coverage we have may not be adequate. We also may not be able to maintain insurance coverage in the future at an acceptable cost. Any liability not covered by insurance or for which third-party indemnification is not available could result in significant liability to us.

In addition, a crash caused by one of our products could damage our reputation for quality products. We believe our customers consider safety and reliability as key criteria in selecting a provider of aircraft products. If a crash were to be caused by one of our products, or if we were to otherwise fail to maintain a satisfactory record of safety and reliability, our ability to retain and attract customers may be materially adversely affected.

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Risks Related to Financial Matters

We have recorded a significant amount of intangible assets, which may never generate the returns we expect.

Mergers and acquisitions have resulted in significant increases in identifiable intangible assets and goodwill. Identifiable intangible assets, which primarily include trademarks, trade names, customer relationships, and technology, were $5,152 million at September 30, 2026, representing 18% of our total assets. Goodwill recognized in accounting for mergers and acquisitions was $12,946 million at September 30, 2026, representing 46% of our total assets. We may never realize the full value of our identifiable intangible assets and goodwill, and to the extent we were to determine that our identifiable intangible assets or our goodwill were impaired within the meaning of applicable accounting standards, we would be required to write-off the amount of any impairment.

We may be subject to risks relating to changes in our tax rates or exposure to additional income tax liabilities.

We are subject to income taxes in the U.S. and various non-U.S. jurisdictions. The Company’s domestic and international tax liabilities are dependent upon the location of earnings among these different jurisdictions. The Company’s future results of operations could be adversely affected by changes in the Company’s effective tax rate as a result of changes in the mix of earnings in countries with differing statutory tax rates, changes in the valuation of deferred tax assets, challenges by tax authorities or changes in tax laws or regulations. From time to time, changes in tax laws or regulations may be proposed or enacted, such as the Organisation for Economic Co-operation and Development (the “OECD”) Pillar Two, Global Anti-Base Erosion Rules, and H.R.1, commonly referred to as the One Big Beautiful Bill Act, that could adversely affect our overall tax liability. There can be no assurance that changes in tax laws or regulations, both within the U.S. and the other jurisdictions in which we operate, will not materially and adversely affect our effective tax rate, tax payments, financial condition and results of operations.

In addition, the amount of income taxes paid by the Company is subject to ongoing audits by U.S. federal, state and local tax authorities and by non-U.S. tax authorities. If these audits result in assessments different from amounts reserved, future financial results may include unfavorable adjustments to the Company’s tax liabilities, which could have a material adverse effect on the Company’s results of operations.

We do not regularly declare and pay quarterly or annual cash dividends on our stock.

Any decision to pay a special cash dividend on our common stock in the future will be at the discretion of our Board and will depend on our results of operations, earnings, capital requirements, financial condition, future prospects, contractual restrictions and other factors deemed relevant by our Board. Therefore, stockholders should not rely on regular quarterly or annual dividend income from shares of our common stock and should not rely on special dividends with any regularity or at all. The amounts that may be available to us to pay future special cash dividends are restricted under our debt and other agreements.

Common stock repurchases under our capital allocation strategy are subject to uncertainties of the market and may affect our common stock price.

Common stock repurchases are one component of our capital allocation strategy. We generally prioritize in the following manner: (1) investing capital in existing businesses, (2) acquisitions of businesses, (3) payment of a special dividend and/or repurchases of our common stock and (4) prepayment of indebtedness or repurchase of debt. Factors that go into any repurchase decision are based on available cash, market conditions, our stock price, other capital allocation opportunities and restrictions under our debt agreements. Although any repurchase is intended to enhance long-term stockholder value, there can be no assurance that they will do so, as the market price of our common stock may decline below the prices at which we repurchase common stock.

General Risks

Our commercial business is sensitive to the number of flight hours that our customers’ planes spend aloft, the size and age of the worldwide aircraft fleet and our customers’ profitability. These items are, in turn, affected by general economic and geopolitical and other worldwide conditions.

Our commercial business is directly affected by, among other factors, changes in revenue passenger kilometers (“RPKs”), the size and age of the worldwide aircraft fleet, the percentage of the fleet that is out-of-warranty and changes in the profitability of the commercial airline industry. RPKs and airline profitability have historically been correlated with the general economic environment, although national and international events also play a key role, such as pandemics, general downturns in the global economy, higher fuel prices and conflicts abroad.

In addition, global market and economic conditions have been challenging due to turbulence in the U.S. and international markets and economies, and may have prolonged declines in business and consumer spending. During periods of reduced airline profitability, some airlines may delay purchases of spare parts, preferring instead to deplete existing inventories, and delay refurbishments and discretionary spending. If demand for spare parts decreases, there would be a decrease in demand for certain products. An adverse change in demand could impact our results of operations, collection of accounts receivable and our expected cash flow generation from current and acquired businesses which may adversely impact our financial condition and access to capital markets.

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U.S. military spending is dependent upon the U.S. defense budget.

The military and defense market is significantly dependent upon government budget trends, particularly the DOW budget. In addition to normal business risks, our supply of products to the U.S. Government is subject to unique risks largely beyond our control. DOW budgets could be negatively impacted by several factors, including, but not limited to, a change in defense spending policy, the U.S. Government’s budget deficits, spending priorities, the cost of sustaining the U.S. military presence internationally and possible political pressure to reduce U.S. Government military spending, each of which could cause the DOW budget to remain unchanged or to decline. A significant decline in U.S. military expenditures could result in a reduction in the amount of our products sold to the various agencies and buying organizations of the U.S. Government.

Our stock price may be volatile, and an investment in our common stock could suffer a decline in value.

There has been significant volatility in the market price and trading volume of equity securities, which is unrelated to the operating performance of the companies issuing the securities. These market fluctuations may negatively affect the market price of our common stock. Stockholders may not be able to sell their shares at or above the purchase price due to fluctuations in the market price of our common stock. Such changes could be caused by changes in our operating performance or prospects, including possible changes due to the cyclical nature of the aerospace industry and other factors such as fluctuations in OEM and aftermarket ordering, which could cause short-term swings in profit margins. Or such changes could be unrelated to our operating performance, such as changes in market conditions affecting the stock market generally or the stocks of aerospace companies or changes in the outlook for our common stock, such as changes to or the confidence in our business strategy, changes to or confidence in our management, or expectations for future growth of the Company.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

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ITEM 1C. CYBERSECURITY

We have established a risk-based cybersecurity and information security program (“program”) designed to assess, identify, and manage material risks from cybersecurity threats. Our cybersecurity risk management process includes policies that specify the requirements for technical security controls, monitoring systems, tools and services from third-party providers, and employee training and awareness. Our cybersecurity risk management process also includes regular independent audits across our operating units. Management oversees our cybersecurity risk management process in order to assess and manage material risks from cybersecurity threats identified by both internal and external threat intelligence. Our program monitors and evaluates risks from cybersecurity threats, and we aim to adapt our program and related processes accordingly.

The multi-layered framework on which our cybersecurity and information security program is built incorporates cybersecurity standards and certain requirements of the National Institute of Standards and Technology (“NIST”) Special Publication 800-171—Protecting Controlled Unclassified Information in Non-Federal Systems and Organizations—along with other legal and regulatory requirements. However, this does not mean that we meet any particular technical standards, specifications, or requirements, but rather that we use NIST and other cybersecurity standards as a guide to help us identify, assess, and manage cybersecurity risks relevant to our business.

Our cybersecurity and information security program is led by the Company’s Vice President of Cybersecurity (“VPoC”) who reports to our Chief Financial Officer. Our VPoC has served as a technology leader of cybersecurity, information security, infrastructure, and operational functions for over 35 years. The VPoC is supported by the Incident Response Team (“IRT”), a management committee made up of the Co-Chief Operating Officers, Chief Financial Officer, and executives in legal, finance, IT, and audit. The IRT supports the VPoC in assessing and managing risks from cybersecurity threats and in the event of a cybersecurity incident, provides oversight and leadership with respect to incident response.

As adopted by our businesses, which have been overseen by our corporate executive team, we have a cybersecurity incident response plan that outlines our policies and procedures to identify, respond to, and recover from cybersecurity threats and cybersecurity incidents. Our businesses are required to conduct regular exercises of their incident response plan as part of our program.

In the event of a potentially material cybersecurity incident, as determined by the VPoC with support from legal, as needed, the IRT is notified through an established escalation protocol. The Chair of the Audit Committee is also notified and briefed, and meetings of the Audit Committee and/or full Board of Directors would be held as appropriate. We have third-party forensic and incident response firms on retainer to support as needed. We maintain cybersecurity insurance to mitigate costs associated with any cybersecurity incidents. The Company’s Board of Directors oversees our enterprise risk management (“ERM”) program and has delegated the primary responsibility for its oversight, which includes oversight of cybersecurity risk, to the Audit Committee. The Audit Committee is informed of material risks from cybersecurity threats through regular discussion with management regarding cybersecurity risk mitigation and cybersecurity incident management. Executive management, including our VPoC, regularly presents to the Audit Committee regarding cybersecurity matters, including program updates, key metrics, and developments.

The ERM program inventories and classifies key risk areas. We employ a methodology for scoring the risks based on the probability and impact of individual risks and discuss and implement countermeasures to address the risks.

Based on the information we have as of the date of this Annual Report on Form 10-K, we do not believe any risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, have materially affected or are reasonably likely to materially affect our business strategy, results of operations or financial condition. For further information about risks related to cybersecurity threats, refer to Item 1A. “Risk Factors.”

ITEM 2. PROPERTIES

Our corporate headquarters is located in Cleveland, Ohio. We maintain approximately 137 manufacturing facilities which are used by the operating units that make up our three reportable segments: Power & Control, Airframe and Non-aviation. Most of our manufacturing facilities consist of manufacturing, distribution and engineering functions, and most facilities have certain administrative functions, including management, sales and finance and are a combination of leased and owned. The facilities are situated in 30 states within the United States and in 13 other countries. Our properties consist of sales and administrative offices and distribution centers as well as manufacturing plants. None of our facilities are individually material to our operations.

Management believes that our machinery, plants and offices are in satisfactory operating condition and that it will have sufficient capacity to meet foreseeable future needs without incurring significant additional capital expenditures.

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ITEM 3. LEGAL PROCEEDINGS

The Company is involved in various claims and legal actions arising in the ordinary course of business. We believe that the outcome of these matters will not have a material adverse effect on our financial position, results of operations, or cash flows. From time to time, we are involved in matters that involve governmental authorities as a party under federal, state and local laws that have been enacted or adopted regulating the discharge of materials into the environment or primarily for the purpose of protecting the environment. We will report such matters that equal or exceed, or that we reasonably believe may equal or exceed, $1 million in monetary sanctions.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information

Our common stock is traded on the New York Stock Exchange, or NYSE, under the ticker symbol “TDG.”

Holders

As of October 16, 2026, there were 27 holders of record of our common stock. We estimate that there were approximately 824,000 beneficial owners of our common stock as of that date, including stockholders whose shares are held in street name by banks and brokers.

Performance Graph

Set forth below is a line graph comparing the cumulative total return of a hypothetical investment in the shares of common stock of TD Group with the cumulative total return of a hypothetical investment in each of the S&P 500 Index and the S&P Aerospace & Defense Select Industry Index. An investment of $100 (with reinvestment of all dividends) is assumed to have been made in our common stock and in each of the indexes on September 30, 2021, and its relative performance is tracked through September 30, 2026.

The following performance graph and related information shall not be deemed “soliciting material” nor to be “filed” with the SEC, nor shall such information be incorporated by reference into any future filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, each as amended, except to the extent we specifically incorporate it by reference into such filing.

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COMPARISON OF 5 YEAR CUMULATIVE TOTAL RETURN*

Among TransDigm Group Inc., the S&P 500 Index and S&P Aerospace & Defense Select Industry Index

*$100 invested on 9/30/2021 in stock or index, including reinvestment of dividends.


	9/30/2021	9/30/2022	9/30/2023	9/30/2024	9/30/2025	9/30/2026
TransDigm Group Inc.	100.00	86.40	138.80	243.53	253.73	208.41
S&P 500 Index	100.00	84.53	102.80	140.17	164.84	190.78
S&P Aerospace & Defense Select Industry Index	100.00	77.43	95.47	135.31	204.38	201.76

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Purchases of Equity Securities by the Issuer or Affiliated Purchaser

The following table presents information about repurchases of TransDigm Group Inc. common stock made by the Company during the fourth quarter of fiscal year 2026 (in millions, except shares and average price per share data):


				Total Number of Shares	Dollar Value of Shares
	Total Number	Average Price		Repurchased as Part	That May Yet Be
	of Shares	Paid		of Publicly Announced	Purchased Under the
Period	Repurchased	Per Share		Plans or Programs	Plans or Programs (1)
June 28, 2026 - July 25, 2026	24,540	$	1,196.74	24,540	$	3,951
July 26, 2026 - August 22, 2026	132,660	1,242.31		132,660	3,787
August 23, 2026 - September 30, 2026	662,856	1,130.02		662,856	3,038
Total	820,056	$	1,150.18	820,056



(1)						On January 27, 2022, the Board authorized a stock repurchase program permitting repurchases of up to $2.2 billion of the Company’s outstanding shares (referred to herein as the “existing stock repurchase program”), replacing the $650 million stock repurchase program. In November 2025, the Board increased the authorization under the existing stock repurchase program by $5.0 billion. Repurchases are subject to any restrictions in the Credit Agreement and the indentures governing the Subordinated Notes and Secured Notes. There is no expiration date for the existing stock repurchase program.

ITEM 6. [RESERVED]

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion of our financial condition and results of operations should be read together with TD Group’s consolidated financial statements and the related notes included elsewhere in this report. The following discussion may contain predictions, estimates and other forward-looking statements that involve a number of risks and uncertainties, including those discussed under the heading entitled “Risk Factors” included elsewhere in this report. These risks could cause our actual results to differ materially from any future performance suggested below.

Overview

We believe we are a leading global designer, producer and supplier of highly engineered proprietary aerospace components with significant aftermarket content. We seek to develop highly customized products to solve specific needs for aircraft operators and manufacturers. We attempt to differentiate ourselves based on engineering, service and manufacturing capabilities. We believe that our products have strong brand names within the industry and that we have a reputation for high quality, reliability and strong customer support. We believe we have achieved steady, long-term growth in sales and improvements in operating performance due to our competitive strengths and through execution of our value-driven operating strategy. More specifically, focusing our businesses on our value-driven operating strategy of obtaining profitable new business, carefully controlling the cost structure via productivity and cost improvements and pricing our highly engineered value-added products to fairly reflect the value we provide and the resources required to do so has historically resulted in improvements in gross profit and income from operations over the long-term.

We maintain a disciplined acquisition strategy focused on proprietary commercial aerospace component businesses with significant aftermarket content, where we see a clear path to create value and earn private equity-like returns by applying our three core value drivers. Integrating acquired businesses into our existing operations and applying our operating strategy has historically improved the financial performance of the acquired businesses.

For fiscal year 2026, we generated net sales of $10,557 million, gross profit of $6,254 million or 59.2% of net sales, and net income attributable to TD Group of $2,107 million.

Our commercial aftermarket sales are primarily a function of air travel demand. Commercial aftermarket sales increased in fiscal 2026 compared to fiscal 2025 primarily due to overall demand, which resulted in higher flight hours and utilization of passenger and freight aircraft, despite the softening in industry capacity and RPKs arising from the conflict in the Middle East. Sales also benefited from customers completing deferred maintenance work. We are monitoring the ongoing conflict in the Middle East and the adverse effects on global energy supplies and prices, global supply chains and commercial air travel. To date, we have not seen a significant change in commercial aftermarket order activity relative to the levels prior to the start of the conflict, as demand remains strong. We continue to monitor the evolving macroeconomic environment. However, at this time we do not expect the conflict or its related effects to result in a material adverse effect on our business, financial condition and results of operations.

Our commercial transport OEM shipments and sales generally run ahead of aircraft delivery schedules. Consistent with prior years, our fiscal 2026 shipments were a function of, among other things, the estimated 2026 and 2027 commercial aircraft production rates for Boeing and Airbus. Airline demand for new aircraft remains high and the OEMs, particularly Boeing and Airbus, continued to steadily increase aircraft production in recent quarters. Commercial OEM sales increased in fiscal 2026 compared to fiscal 2025 primarily due to the aircraft production increases by Boeing and Airbus.

Our defense sales fluctuate from year-to-year, and are dependent, to a degree, on government budget constraints, the timing of orders, macro and micro dynamics with respect to the DOW procurement policy and the extent of global conflicts. Likewise, delays in government spending outlays and government funding reprioritization can impact demand. For a variety of reasons, the military spending outlook is very uncertain, though recent DOW budgets have trended upwards due to recent geopolitical challenges and conflicts, and current military modernization efforts. Defense sales increased in fiscal 2026 compared to fiscal 2025 primarily due to continued growth in defense spending in both domestic and international markets.

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Results of Operations

The following table sets forth, for the periods indicated, certain operating data of the Company, including presentation of the amounts as a percentage of net sales (amounts in millions, except per share data):


	Fiscal Years Ended September 30,
	2026			% of Net Sales		2025			% of Net Sales
Net sales	$	10,557		100.0	%	$	8,831		100.0	%
Cost of sales	4,303			40.8	%	3,520			39.9	%
Selling and administrative expenses	1,191			11.3	%	945			10.7	%
Amortization of intangible assets	252			2.4	%	201			2.3	%
Income from operations	4,811			45.6	%	4,165			47.2	%
Interest expense-net	2,008			19.0	%	1,572			17.8	%
Refinancing costs	28			0.3	%	11			0.1	%
Other expense (income)	11			0.1	%	(47)			(0.5)	%
Income tax provision	656			6.2	%	555			6.3	%
Income from continuing operations	2,108			20.0	%	2,074			23.5	%
Less: Net income attributable to noncontrolling interests	(1)			—	%	—			—	%


Net income attributable to TD Group	$	2,107		20.0	%	$	2,074		23.5	%
Net income applicable to TD Group common stockholders	$	2,048	(1)	19.4	%	$	1,866	(1)	21.1	%
Earnings per share attributable to TD Group common stockholders:


Basic and diluted	$	35.51	(2)			$	32.08	(2)
Cash dividends declared per common share	$	—				$	90.00
Weighted-average shares outstanding—basic and diluted	57.6					58.2
Other Data:
EBITDA	$	5,217	(3)			$	4,568	(3)
EBITDA As Defined	$	5,563	(3)	52.7	%	$	4,760	(3)	53.9	%

(1)Net income applicable to TD Group common stockholders represents net income attributable to TD Group less special dividends declared or paid on participating securities, including dividend equivalents of $59 million and $208 million for the fiscal years ended September 30, 2026 and 2025, respectively.

(2)Earnings per share is calculated by dividing net income applicable to TD Group common stockholders by the basic and diluted weighted average common shares outstanding. Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated using unrounded numbers.

(3)Refer to “Non-GAAP Financial Measures” in this discussion and analysis for additional information and limitations regarding these non-GAAP financial measures, including a reconciliation to the comparable U.S. GAAP financial measure.

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Changes in Results of Operations

Fiscal year ended September 30, 2026 compared with fiscal year ended September 30, 2025

Total Company

•Net Sales. Net organic sales and acquisition sales and the related dollar and percentage changes for the fiscal years ended September 30, 2026 and 2025 were as follows (amounts in millions):


	Fiscal Years Ended						% Change Net Sales
	September 30, 2026		September 30, 2025		Change
Organic sales	$	9,832	$	8,831	$	1,001	11.3	%
Acquisition sales	725		—		725		8.2	%
Net sales	$	10,557	$	8,831	$	1,726	19.5	%

Organic sales represent net sales from existing businesses owned by the Company, excluding sales from acquisitions. Acquisition sales represent net sales from acquired businesses for the period up to one year from the respective acquisition date. We believe this measure provides investors with a supplemental understanding of underlying sales trends by providing sales growth on a consistent basis. Refer to Note 2, “Acquisitions,” in the notes to the consolidated financial statements included herein for information on the Company’s recent acquisitions.

The increase in organic sales of approximately $1,000 million for the fiscal year ended September 30, 2026, compared with the fiscal year ended September 30, 2025, was due to increases in defense sales of approximately $400 million (10%), commercial aftermarket sales of approximately $350 million (13%) and commercial OEM sales of approximately $250 million (14%).

•Cost of Sales and Gross Profit. Cost of sales increased by $783 million or 22.2%, to $4,303 million for the fiscal year ended September 30, 2026 compared to $3,520 million for the fiscal year ended September 30, 2025. Cost of sales and the related percentage of net sales for the fiscal years ended September 30, 2026 and 2025 were as follows (amounts in millions):


	Fiscal Years Ended
	September 30, 2026			September 30, 2025			Change		% Change
Cost of sales - excluding costs below	$	4,077		$	3,336		$	741	22.2	%
% of net sales	38.6		%	37.8		%
Depreciation	163			141			22		15.6	%
% of net sales	1.5		%	1.6		%
Acquisition transaction and integration-related expenses	45			18			27		150.0	%
% of net sales	0.4		%	0.2		%
Non-cash stock and deferred compensation expense	16			15			1		6.7	%
% of net sales	0.2		%	0.2		%
Foreign currency losses	2			10			(8)		(80.0)	%
% of net sales	—		%	0.1		%
Total cost of sales	$	4,303		$	3,520		$	783	22.2	%
% of net sales	40.8		%	39.9		%
Gross profit (Net sales less Total cost of sales)	$	6,254		$	5,311		$	943	17.8	%
Gross profit percentage (Gross profit / Net sales)	59.2		%	60.1		%

Cost of sales during the fiscal year ended September 30, 2026 increased as a percentage of net sales. This was primarily due to the dilutive impact of the fiscal 2026 acquisitions on the gross margin. Offsetting the adverse impact the fiscal 2026 acquisitions had on gross profit was a favorable sales mix (particularly, higher commercial aftermarket sales as a percentage of net sales) and the application of our three core value drivers (obtaining profitable new business, continually improving our cost structure and providing highly engineered value-added products to customers) coupled with fixed overhead costs spread over a higher production volume.

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•Selling and Administrative Expenses. Selling and administrative expenses increased by $246 million to $1,191 million for the fiscal year ended September 30, 2026. The related percentage of net sales for the fiscal years ended September 30, 2026 and 2025 was as follows (amounts in millions):


	Fiscal Years Ended
	September 30, 2026			September 30, 2025			Change		% Change
Selling and administrative expenses - excluding costs below	$	993		$	779		$	214	27.5	%
% of net sales	9.4		%	8.8		%
Non-cash stock and deferred compensation expense	142			142			—		—	%
% of net sales	1.3		%	1.6		%
Acquisition transaction and integration-related expenses	56			24			32		133.3	%
% of net sales	0.5		%	0.3		%
Total selling and administrative expenses	$	1,191		$	945		$	246	26.0	%
% of net sales	11.3		%	10.7		%

Selling and administrative expenses during the fiscal year ended September 30, 2026 increased as a percentage of net sales. This was primarily due to the fiscal 2026 acquisitions and additional costs incurred to support the higher net sales growth.

•Interest Expense-net. Interest expense-net includes interest on borrowings outstanding, amortization of debt issuance costs, original issue discount, premium, revolving credit facility fees, finance leases, interest income and the impact of interest rate swaps and collars designated and qualifying as cash flow hedges. Interest expense-net increased $436 million, or 27.7%, to $2,008 million for the fiscal year ended September 30, 2026 from $1,572 million for the comparable period in the prior fiscal year. The increase in interest expense-net was primarily due to an increase in outstanding borrowings and lower interest income. Refer to Note 10, “Debt,” in the notes to the consolidated financial statements included herein for information on our debt. The weighted average interest rate for cash interest payments on total borrowings outstanding was 6.2% and 6.3% for the fiscal years ended September 30, 2026 and September 30, 2025, respectively.

•Income Tax Provision. Income tax expense as a percentage of income before income taxes was approximately 23.7% for the fiscal year ended September 30, 2026 compared to 21.1% for the fiscal year ended September 30, 2025. Refer to Note 12, “Income Taxes,” in the notes to the consolidated financial statements included herein for additional information.

•Earnings per Share. Basic and diluted earnings per share was $35.51 for the fiscal year ended September 30, 2026 and $32.08 for the fiscal year ended September 30, 2025. Net income attributable to TD Group for the fiscal year ended September 30, 2026 of $2,107 million was decreased by dividend equivalent payments of $59 million, or $1.03 per share, resulting in net income applicable to TD Group common stockholders of $2,048 million. Net income attributable to TD Group for the fiscal year ended September 30, 2025 of $2,074 million was decreased by dividend equivalent payments of $208 million, or $3.58 per share, resulting in net income applicable to TD Group common stockholders of $1,866 million.

Business Segments

•Segment Net Sales. Net sales by segment for the fiscal years ended September 30, 2026 and 2025 were as follows (amounts in millions):


	Fiscal Years Ended September 30,
	2026		% of Net Sales		2025		% of Net Sales		Change		% Change
Power & Control	$	5,773	54.7	%	$	4,559	51.6	%	$	1,214	26.6	%
Airframe	4,603		43.6	%	4,112		46.6	%	491		11.9	%
Non-aviation	181		1.7	%	160		1.8	%	21		13.1	%
Net sales	$	10,557	100.0	%	$	8,831	100.0	%	$	1,726	19.5	%

Net sales for the Power & Control segment increased $1,214 million primarily from increases in sales in all three market channels.

Net sales for the Airframe segment increased $491 million primarily from increases in sales in all three market channels.

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•EBITDA As Defined. Refer to “Non-GAAP Financial Measures” in this discussion and analysis for additional information and limitations regarding these non-GAAP financial measures, including a reconciliation to the comparable U.S. GAAP financial measure. EBITDA As Defined by segment for the fiscal years ended September 30, 2026 and 2025 were as follows (amounts in millions):


	Fiscal Years Ended September 30,
	2026		% of Segment Net Sales			2025		% of Segment Net Sales			Change		% Change
Power & Control	$	3,098	53.7	%		$	2,595	56.9	%		$	503	19.4	%
Airframe	2,499		54.3	%		2,210		53.7	%		289		13.1	%
Non-aviation	79		43.6	%		67		41.9	%		12		17.9	%
Total segment EBITDA As Defined	5,676		53.8	%		4,872		55.2	%		804		16.5	%
Less: Unallocated corporate EBITDA As Defined	113		1.1	%	(1)	112		1.3	%	(1)	1		0.9	%
Total Company EBITDA As Defined	$	5,563	52.7	%	(1)	$	4,760	53.9	%	(1)	$	803	16.9	%

(1)Calculated as a percentage of consolidated net sales.

EBITDA As Defined for the Power & Control and Airframe segments increased $503 million and $289 million, respectively, due to the increase in net sales described above, along with our application of our three core value-driven operating strategy.

EBITDA As Defined from acquisitions for the Power & Control and Airframe segments contributed approximately $195 million in aggregate to the increase in EBITDA As Defined. EBITDA As Defined from acquisitions represents EBITDA As Defined from acquired businesses for the period up to one year from the respective acquisition date.

Unallocated corporate EBITDA As Defined consists primarily of corporate expenses which include compensation, benefits, professional services and other administrative costs incurred by our corporate offices.

Fiscal year ended September 30, 2025 compared with fiscal year ended September 30, 2024

For our results of operations for fiscal 2025 compared with fiscal 2024, refer to the discussion in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of Form 10-K for the fiscal year ended September 30, 2025, as filed with the Securities and Exchange Commission on November 12, 2025.

Liquidity and Capital Resources

We historically have maintained a capital structure comprising a mix of equity and debt financing. We vary our leverage both to optimize our equity return and to pursue acquisitions. We expect to meet our current debt obligations as they come due through internally generated funds from current levels of operations and/or through refinancing in the debt markets prior to the maturity dates of our debt.

The following tables present selected balance sheet, cash flow and other financial data relevant to the liquidity or capital resources of the Company for the periods specified below (amounts in millions):


	September 30, 2026		September 30, 2025
Selected Balance Sheet Data:
Cash and cash equivalents	$	2,279	$	2,808
Working capital (Total current assets less total current liabilities)	5,014		4,830
Total assets	28,014		22,909
Total debt (1)	34,763		30,015
TD Group stockholders’ deficit	(10,000)		(9,686)

(1)Includes debt issuance costs, original issue discount and premium. Refer to Note 10, “Debt,” in the notes to the consolidated financial statements included herein for additional information.

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	Fiscal Years Ended September 30,
	2026		2025
Selected Cash Flow and Other Financial Data:
Cash flows provided by (used in):
Operating activities	$	2,187	$	2,038
Investing activities	(4,662)		(595)
Financing activities	1,954		(4,900)
Capital expenditures	274		222
Ratio of earnings to fixed charges (1)	2.4x		2.7x

(1)For purposes of computing the ratio of earnings to fixed charges, earnings consist of income from continuing operations before income taxes plus fixed charges. Fixed charges consist of interest expense, amortization of debt issuance costs, original issue discount and premium and the “interest component” of rental expense.

Significant Transactions of Fiscal 2026 and Subsequent Events

Debt Financing

Below is further information on the significant debt financing transactions occurring in fiscal 2026:

•On February 13, 2026, the Company issued $2,000 million of new debt, consisting of $1,200 million in aggregate principal amount of senior subordinated notes due 2034 at an issue price of 100% that bear interest at 6.125% (the “$1,200 million 6.125% 2034 Notes”) and $800 million of Tranche N term loans (the “Initial Tranche N term loans”) that bear interest at Term SOFR plus 2.50%.

The net proceeds from the February 13, 2026 new debt issuances were used, along with cash on hand, to fund the purchase price of the acquisition of Jet Parts Engineering (“JPE”) and Victor Sierra Aviation Holdings (“VSA”) and for related transaction fees and expenses.

•On April 17, 2026, the Company issued $1,500 million of new debt, consisting of (1) $500 million in additional 6.125% senior subordinated notes due 2034 at an issue price of 100.375% (the “Additional 6.125% 2034 Notes”), which resulted in a premium of approximately $2 million, and (2) $1,000 million of additional Tranche N term loans (the “Additional Tranche N term loans”) bearing interest at Term SOFR plus 2.50% (collectively, the Additional Tranche N term loans and the Initial Tranche N term loans are referred to herein as the “Tranche N term loans”). The Additional 6.125% 2034 Notes and the $1,200 million 6.125% 2034 Notes, are together referred to as the “6.125% 2034 Notes,” and the Additional Tranche N term loans and the Initial Tranche N term loans are together referred to as the “Tranche N term loans.”

The net proceeds from the April 17, 2026 new debt were intended to be used, along with cash on hand, to fund the purchase price of the proposed acquisition of Stellant Systems, Inc., common stock repurchases and for general corporate purposes. Notwithstanding the July 13, 2026 announcement that the Company withdrew from its proposed acquisition of Stellant Systems, Inc., there was no special mandatory redemption of the April 17, 2026 debt issuances and they remain outstanding. The Company had previously entered into a definitive agreement to acquire all the outstanding stock of Stellant Systems, Inc. on December 30, 2025.

•On July 10, 2026, the Company amended its trade receivable securitization facility (the “Securitization Facility”) to, among other things, (i) increase the borrowing capacity from $725 million to $1,000 million; and (ii) extend the maturity date to July 9, 2027. The Company subsequently drew $150 million available under the Securitization Facility in the fourth quarter of fiscal 2026. As of September 30, 2026, the Company has drawn $875 million and has $125 million of available borrowing capacity under its Securitization Facility.

•On September 14, 2026, the Company announced a cash tender offer for any and all of its outstanding $2,100 million aggregate principal amount of 6.750% Senior Secured Notes due 2028 (the “2028 Secured Notes”). On September 29, 2026, the Company purchased approximately $1,831 million aggregate principal amount of the 2028 Secured Notes that had been validly tendered before the early tender deadline of September 25, 2026. Holders received total consideration of $1,008.00 (plus accrued and unpaid interest) per $1,000 principal amount. The total consideration included an early tender premium of $30.00 per $1,000 principal amount. The Company paid a premium in excess of par of approximately $15 million, which is expensed as refinancing costs. Approximately $269 million aggregate principal amount of the 2028 Secured Notes remained outstanding as of September 30, 2026. Subsequent to September 30, 2026, approximately $2 million aggregate principal amount of the 2028 Secured Notes were validly tendered and repurchased by the Company prior to the expiration of the tender offer on October 13, 2026.

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•On September 28, 2026, the Company issued $3,000 million of new debt, consisting of senior secured notes due 2035 at an issue price of 100% that bear interest at 6.750% (the “2035 Secured Notes”). The net proceeds from the 2035 Secured Notes were used to repurchase the tendered 2028 Secured Notes (as further described above) and for general corporate purposes.

Acquisitions

During fiscal 2026, the Company completed approximately $4,400 million in acquisitions of businesses, net of cash acquired. Below is further information on the acquisitions occurring in fiscal 2026:

•On October 6, 2025, the Company completed the acquisition of all the outstanding stock of Simmonds for approximately $757 million in cash. The acquisition was financed using cash on hand.

•On April 7, 2026, the Company completed the acquisition of approximately 95% of the outstanding stock of JPE and approximately 96% of the outstanding stock of VSA for approximately $2,142 million in cash, net of cash acquired. The definitive agreement to acquire JPE and VSA was entered into on January 13, 2026. The acquisition was financed using cash on hand and the net proceeds from the debt offerings completed in February 2026 (as further described above).

•On September 28, 2026, the Company completed the acquisition of approximately 99% of the outstanding stock of Prince & Izant (“P&I”) for approximately $1,058 million in cash, net of cash acquired. The definitive agreement to acquire P&I was entered into on July 27, 2026. The acquisition was financed using cash on hand.

•During fiscal 2026, the Company completed several acquisitions consisting of substantially all of the assets and technical data rights of certain product lines or all the outstanding stock of certain businesses (collectively, referred to herein as the “Other Acquisitions”), each meeting the definition of a business, for a total aggregate purchase price of $434 million in cash. These acquisitions represent bolt-ons to existing TransDigm operating units. Each of the acquisitions was financed using cash on hand.

On September 21, 2026, the Company announced that its operating unit, Extant Aerospace, entered into a definitive agreement to acquire certain assets comprising a portfolio of commercial rotorcraft, land systems and business jet products, including a manufacturing facility located in California, for approximately $240 million in cash. The acquisition is expected to close during fiscal 2027, subject to standard regulatory approvals and the satisfaction of customary closing conditions.

Common Stock Repurchases

In November 2025, the Board authorized an additional $5.0 billion in share repurchases of common stock permissible under the Company’s existing stock repurchase program, subject to any restrictions specified in the Credit Agreement and indentures governing the existing Subordinated and Secured Notes. There is no expiration date for the existing stock repurchase program.

In fiscal 2026, the Company repurchased, in aggregate, 2,316,439 shares of common stock at an average price of $1,187.21 per share for a total amount of $2,750 million. The repurchased shares of common stock are classified as treasury stock in the statement of changes in stockholders’ deficit. As of September 30, 2026, $3,038 million remained available for repurchase under the existing stock repurchase program. Whether the Company undertakes additional stock repurchases or other aforementioned activities will depend on prevailing market conditions, the Company’s liquidity requirements, contractual restrictions and other factors.

* * * * *

If the Company has excess cash, it generally prioritizes allocating the excess cash in the following manner: (1) investing capital in existing businesses, (2) acquisitions of businesses, (3) payment of a special dividend and/or repurchases of our common stock and (4) prepayment of indebtedness or repurchase of debt.

The Company’s ability to make scheduled interest payments on, or to refinance, the Company’s indebtedness, or to fund non-acquisition related capital expenditures and research and development efforts, will depend on the Company’s ability to generate cash in the future. This is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond its control.

The Company’s objective is to maintain an allocation of at least 75% fixed rate and no more than 25% variable rate debt thereby limiting its exposure to changes in near-term interest rates. Interest rate swaps and collars used to hedge and offset, respectively, the variable interest rates on our term loans are further described in Note 18, “Derivatives and Hedging Activities,” in the notes to the consolidated financial statements included herein. As of September 30, 2026, approximately 75% of our gross debt was fixed rate.

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As of September 30, 2026, the Company has significant cash liquidity as illustrated in the table presented below (in millions):


	As of September 30, 2026
Cash and cash equivalents	$	2,279
Availability on revolving credit facility	865
Cash liquidity	$	3,144

We believe our significant cash liquidity will allow us to meet our anticipated funding requirements. We expect to meet our short-term cash liquidity requirements (including interest obligations and capital expenditures) through net cash from operating activities, cash on hand and, if needed, draws on the revolving credit facility. Long-term cash liquidity requirements consist primarily of obligations under our long-term debt agreements. There is no maturity on any tranche of term loans or notes until August 2028 (fiscal 2028). The $875 million outstanding under the Securitization Facility matures on July 9, 2027.

The Company estimates its capital expenditures in fiscal year 2027 to be approximately 2.75% to 3.50% of net sales. The Company’s capital expenditures incurred from year-to-year are funded using existing cash on hand and are primarily for projects that are consistent with our three core value drivers (obtaining profitable new business, continually improving our cost structure and providing highly engineered value-added products to customers) such as automation projects.

In connection with the continued application of our three core value-driven operating strategy, we expect our efforts will continue to generate strong margins and provide sufficient cash provided by operating activities to meet our interest obligations and liquidity needs. We believe our cash provided by operating activities and available borrowing capacity will enable us to make strategic business acquisitions, pay dividends to our stockholders and make opportunistic investments in our own stock, subject to any restrictions in our existing Credit Agreement and market conditions.

The Company may issue additional debt if prevailing market conditions are favorable to doing so. In addition, the Company may increase its borrowings in connection with acquisitions, if cash flow from operating activities becomes insufficient to fund current operations or for other short-term cash needs or for common stock repurchases or dividends. Our future leverage will also be impacted by the then current conditions of the credit markets.

Operating Activities. The Company generated $2,187 million of net cash from operating activities during fiscal 2026 compared to $2,038 million during fiscal 2025.

The change in trade accounts receivable during fiscal 2026 was a use of cash of $258 million compared to a use of cash of $212 million in fiscal 2025. The increase is primarily attributable to increased revenue. The Company actively manages its accounts receivable, the related agings and collection efforts.

The change in inventories during fiscal 2026 was a use of cash of $272 million compared to a use of cash of $146 million in fiscal 2025. The increase is due to an increase in raw materials to support fiscal 2027 sales demand. The Company manages inventory levels in support of customer needs.

The change in accounts payable during fiscal 2026 was a source of cash of $73 million compared to a source of cash of $38 million in fiscal 2025. The change is due to the timing of payments to suppliers.

Investing Activities. Net cash used in investing activities was $4,662 million during fiscal 2026, consisting of the acquisitions of Simmonds, JPE and VSA, P&I and other acquisitions of businesses aggregating to $4,389 million and capital expenditures of $274 million; partially offset by other investing transactions inflows of $1 million.

Net cash used in investing activities was $595 million during fiscal 2025, consisting of the acquisition of Servotronics, Inc. (“Servotronics”) and other acquisitions of businesses aggregating to $419 million and capital expenditures of $222 million; partially offset by other investing transactions inflows of $46 million.

Financing Activities. Net cash provided by financing activities was $1,954 million during fiscal 2026. The source of cash was primarily attributable to the net proceeds of short-term and long-term debt transactions, including fees and other financing costs, aggregating to $4,608 million plus proceeds from stock option exercises of $155 million; partially offset by repurchases of common stock of $2,750 million and dividend equivalent payments of $59 million.

Net cash used in financing activities was $4,900 million during fiscal 2025. The use of cash was attributable to dividend and dividend equivalent payments of $9,629 million plus repurchases of common stock of $500 million; partially offset by the net proceeds of short-term and long-term debt transactions, including fees and other financing costs, aggregating to $5,063 million plus proceeds from stock option exercises of $166 million.

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Description of Senior Secured Term Loans and Indentures

Senior Secured Term Loans Facilities

TransDigm has $12,803 million in fully drawn term loans (the “Term Loans Facility”) as of September 30, 2026 and a $910 million revolving credit facility. The Term Loans Facility consists of five tranches of term loans with maturity dates ranging from March 22, 2030 to February 13, 2033, and requires quarterly aggregate principal payments of $32 million. Refer to Note 10, “Debt” in the notes to the consolidated financial statements included herein for information on our term loans.

The revolving commitments consist of two tranches which include up to $139 million of multicurrency revolving commitments. At September 30, 2026, the Company had $45 million in letters of credit outstanding and $865 million was available for borrowing under the revolving commitments. Draws on the revolving commitments are subject to an interest rate of Term SOFR plus 2.25%. The unused portion of the revolving commitments is subject to a fee of 0.50% per annum. The maturity date of the revolving credit facility is February 27, 2029.

The interest rates per annum applicable to the Term Loans Facility under the Credit Agreement are, at TransDigm’s option, equal to either an alternate base rate or an adjusted Term SOFR for one, three or six-month interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The adjusted Term SOFR related to the Term Loans Facility is not subject to a floor. Refer to Note 18, “Derivatives and Hedging Activities,” in the notes to the consolidated financial statements included herein for information about how our interest rate swaps and collar agreements are used to hedge and offset, respectively, the variable interest rate portion of our debt.

Indentures

The following table represents the senior subordinated and secured notes outstanding as of September 30, 2026:

Description

Aggregate Principal

Maturity Date

Interest Rate

2028 Secured Notes (2)

$269 million

August 15, 2028

6.750%

4.625% 2029 Notes (1)

$1,200 million

January 15, 2029

4.625%

2029 Secured Notes (2)

$2,750 million

March 1, 2029

6.375%

4.875% 2029 Notes (1)

$750 million

May 1, 2029

4.875%

2030 Secured Notes (2)

$1,450 million

December 15, 2030

6.875%

2031 Secured Notes (2)

$1,000 million

December 1, 2031

7.125%

2032 Secured Notes (2)

$2,200 million

March 1, 2032

6.625%

2033 Secured Notes (2)

$1,500 million

January 15, 2033

6.000%

6.375% 2033 Notes (1)

$2,650 million

May 31, 2033

6.375%

2034 Secured Notes (2)

$500 million

January 31, 2034

6.250%

6.750% 2034 Notes (1)

$2,000 million

January 31, 2034

6.750%

6.125% 2034 Notes (1)

$1,700 million

July 31, 2034

6.125%

2035 Secured Notes (2)

$3,000 million

January 31, 2035

6.750%

(1)Collectively, referred to as the “Subordinated Notes” herein.

(2)Collectively, referred to as the “Secured Notes” herein.

The Subordinated Notes and Secured Notes do not require principal payments prior to their maturity. Interest under the Subordinated Notes and Secured Notes is payable semi-annually. The Subordinated Notes represent our unsecured obligations ranking subordinate to our senior debt, as defined in the applicable indentures. The Secured Notes represent our secured obligations ranking equally to all existing and future senior debt, as defined in the applicable indentures. The Subordinated Notes and Secured Notes contain many of the restrictive covenants included in the Credit Agreement. TransDigm is in compliance with all of the covenants contained in the Subordinated Notes and Secured Notes.

Guarantor Information

TransDigm Inc. is the issuer of the Subordinated Notes and the Secured Notes. The notes are fully and unconditionally guaranteed, on a joint and several basis, as described below.

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The Subordinated Notes are unsecured obligations of TransDigm Inc. They are subordinated in right of payment to all of TransDigm Inc.’s existing and future senior indebtedness, including the Secured Notes and borrowings under the senior secured credit facilities. They rank equally in right of payment with all of TransDigm Inc.’s existing and future senior subordinated indebtedness, and rank senior in right of payment to all of TransDigm Inc.’s future indebtedness that is expressly subordinated to the Subordinated Notes.

The 4.625% 2029 Notes and the 4.875% 2029 Notes are fully and unconditionally guaranteed, on a joint and several, senior subordinated unsecured basis, by TransDigm Group, TransDigm UK Holdings Limited (“TransDigm UK”) and TransDigm Inc.’s domestic restricted subsidiaries named in the applicable indentures. The 6.375% 2033 Notes, the 6.750% 2034 Notes and the 6.125% 2034 Notes are fully and unconditionally guaranteed, on a joint and several, senior subordinated unsecured basis, by TransDigm Group and each of TransDigm Inc.’s direct and indirect restricted subsidiaries that is a borrower or guarantor under TransDigm Inc.’s senior secured credit facilities, or that issues or guarantees any capital markets indebtedness of TransDigm Inc. or any of the guarantors in an aggregate principal amount of at least $200 million (each as defined in the applicable indentures). As of the date of this Form 10-K, those guarantors consist of the domestic subsidiaries of TransDigm Inc. named in the applicable indentures and TransDigm UK, as listed in Exhibit 22.1 to this Form 10-K.

The guarantees of the Subordinated Notes are subordinated in right of payment to all of the guarantors’ existing and future senior indebtedness, rank equally with all of their existing and future senior subordinated indebtedness, and rank senior to all of their future indebtedness that is expressly subordinated to the guarantees of the Subordinated Notes. The Subordinated Notes are structurally subordinated to all of the liabilities of TransDigm Inc.’s non-guarantor subsidiaries.

The Secured Notes are senior secured obligations of TransDigm Inc. They rank equally in right of payment with all of TransDigm Inc.’s existing and future senior indebtedness, including indebtedness under the senior secured credit facilities, and rank senior in right of payment to all of TransDigm Inc.’s existing and future indebtedness that is expressly subordinated to the Secured Notes, including the Subordinated Notes.

The 2028 Secured Notes are fully and unconditionally guaranteed, on a joint and several, senior secured basis by TransDigm Group, TransDigm UK and TransDigm Inc.’s domestic restricted subsidiaries named in the applicable indentures. The 2029 Secured Notes, 2030 Secured Notes, 2031 Secured Notes, 2032 Secured Notes, 2033 Secured Notes, 2034 Secured Notes and 2035 Secured Notes are fully and unconditionally guaranteed, on a joint and several, senior secured basis by TransDigm Group and each of TransDigm Inc.’s direct and indirect restricted subsidiaries (as defined in the applicable indenture) that is a borrower or guarantor under TransDigm Inc.’s senior secured credit facilities, or that issues or guarantees any capital markets indebtedness of TransDigm Inc. or any of the guarantors in an aggregate principal amount of at least $200 million (each as defined in the applicable indentures). As of the date of this Form 10-K, the guarantors of those series consist of the same entities as the guarantors of the 2028 Secured Notes. The guarantees of the Secured Notes rank equally in right of payment with all of the guarantors’ existing and future senior indebtedness, including their guarantees under the senior secured credit facilities, and rank senior in right of payment to all of their existing and future indebtedness that is expressly subordinated to the guarantees of the Secured Notes, including their guarantees of the Subordinated Notes. The Secured Notes are structurally subordinated to all of the liabilities of TransDigm Inc.’s non-guarantor subsidiaries.

Separate financial statements of TransDigm Inc. are not presented because the Subordinated Notes and Secured Notes are fully and unconditionally guaranteed, on a joint and several, senior subordinated unsecured basis (Subordinated Notes) and senior secured basis (Secured Notes) by the guarantors described above. TransDigm Group has no significant operations or assets separate from its investment in TransDigm Inc.

The summarized financial information below is presented on a combined basis for TransDigm Group, TransDigm Inc. and the other guarantors, which includes TransDigm UK. Intercompany balances and transactions between TransDigm Group, TransDigm Inc. and the other guarantors have been eliminated. Investments in, and equity in the earnings of, non-guarantor subsidiaries have been excluded, and amounts due from, amounts due to, and transactions with non-guarantor subsidiaries are presented separately.


(in millions)	As of September 30, 2026		As of September 30, 2025
Current assets	$	4,653	$	4,494
Goodwill	10,145		8,340
Other non-current assets	5,636		4,003
Current liabilities	1,350		1,048
Non-current liabilities	34,854		30,014
Redeemable noncontrolling interests	78		—
Amounts due (from) to subsidiaries that are non-issuers and non-guarantors-net	(2,554)		(2,316)

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	Fiscal Year Ended
(in millions)	September 30, 2026
Net sales	$	8,520
Sales to subsidiaries that are non-issuers and non-guarantors	34
Cost of sales	3,410
Expense from subsidiaries that are non-issuers and non-guarantors-net	73
Income from continuing operations	1,379
Net income attributable to TD Group	1,378

Certain Restrictive Covenants in Our Debt Documents

The Credit Agreement and the indentures governing the Subordinated Notes and Secured Notes contain restrictive covenants that, among other things, limit the incurrence of additional indebtedness, the payment of special dividends, transactions with affiliates, asset sales, acquisitions, mergers and consolidations, liens and encumbrances, and prepayments of certain other indebtedness.

The restrictive covenants included in the Credit Agreement are subject to amendments executed periodically. The most recent amendment that impacted the restrictive covenants contained in the Credit Agreement is Amendment No. 15, executed on March 22, 2024.

Under the terms of the Credit Agreement, TransDigm is entitled, on one or more occasions, to request additional term loans or additional revolving commitments to the extent that the existing or new lenders agree to provide such incremental term loans or additional revolving commitments provided that, among other conditions, our consolidated net leverage ratio would be no greater than 7.25x and the consolidated secured net debt ratio would be no greater than 5.00x, in each case, after giving effect to such incremental term loans or additional revolving commitments.

If any such default occurs, the lenders under the Credit Agreement and the holders of the Subordinated Notes and Secured Notes may elect to declare all outstanding borrowings, together with accrued interest and other amounts payable thereunder, to be immediately due and payable. The lenders under the Credit Agreement also have the right in these circumstances to terminate any commitments they have to provide further borrowings. In addition, following an event of default under the Credit Agreement, the lenders thereunder and the holders of the Secured Notes will have the right to proceed against the collateral granted to them to secure the debt, which includes our available cash, and they will also have the right to prevent us from making debt service payments on the Notes.

With the exception of the revolving credit facility, the Company has no maintenance covenants in its existing term loan and indenture agreements. Under the Credit Agreement, if the usage of the revolving credit facility exceeds 40% (or, currently, $364 million) of the total revolving commitments, the Company is required to maintain a maximum consolidated net leverage ratio of net debt to trailing four-quarter EBITDA As Defined of 7.50x (or, solely with respect to the first four fiscal quarters ending after the consummation of any material acquisition, 8.00x) as of the last day of the fiscal quarter.

As of September 30, 2026, the Company was in compliance with all of its debt covenants and expects to remain in compliance with its debt covenants in subsequent periods.

Trade Receivable Securitization Facility

During fiscal 2014, the Company established the Securitization Facility. The Company’s Securitization Facility effectively increases the Company’s borrowing capacity depending on the amount of the domestic operations’ trade accounts receivable. The Securitization Facility includes the right for the Company to exercise annual one year extensions as long as there have been no termination events as defined by the agreement. The Company uses the proceeds from the Securitization Facility as an alternative to other forms of debt, effectively reducing borrowing costs.

On July 10, 2026, the Company amended the Securitization Facility to, among other things, (i) increase the borrowing capacity from $725 million to $1,000 million; and (ii) extend the maturity date to July 9, 2027. The Company subsequently drew $150 million available under the Securitization Facility in the fourth quarter of fiscal 2026.

As of September 30, 2026, the total drawn on the Securitization Facility is $875 million and the borrowing capacity available is $125 million. As of September 30, 2026 and 2025, the applicable interest rate was 5.09% and 5.67%, respectively. The Securitization Facility is collateralized by substantially all of the Company’s domestic operations’ trade accounts receivable.

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Contractual Obligations and Commitments

The following table summarizes the Company’s cash requirements from all significant contractual obligations as of September 30, 2026 (in millions):


	Total		Payment Due by Period
	Contractual		Less than		Between		Between		Over
	Obligations		1 Year		1-3 Years		3-5 Years		5 Years
Senior Subordinated and Secured Notes (1)	$	20,969	$	—	$	4,969	$	1,450	$	14,550
Term Loans Facility (2)	12,803		130		259		6,967		5,447
Scheduled interest payments (3)	12,005		2,266		4,253		3,309		2,177
Securitization Facility	875		875		—		—		—
Finance leases	662		29		61		63		509
Operating leases	121		27		38		21		35
Total contractual cash obligations	$	47,435	$	3,327	$	9,580	$	11,810	$	22,718

(1)Represents principal maturities which excludes interest, debt issuance costs, original issue discount and premium.

(2)Refer to Note 10, “Debt,” in the notes to the consolidated financial statements included herein for information on the maturity date of each tranche of term loans. The Term Loans Facility requires quarterly aggregate principal payments of approximately $32 million.

(3)Assumes that the variable interest rate on our existing term loans under our Term Loans Facility ranges from approximately 6.29% to 7.38% based on anticipated movements in Term SOFR, which given the ongoing volatility in rates, are highly uncertain. In addition, interest payments include the impact of the existing interest rate swap and collar agreements described in Note 18, “Derivatives and Hedging Activities,” in the notes to the consolidated financial statements included herein.

Off-Balance Sheet Arrangements

The Company utilizes letters of credit to back certain payment and performance obligations. Letters of credit are subject to limits based on amounts outstanding under the Company’s revolving credit facility. As of September 30, 2026, the Company had $45 million in letters of credit outstanding.

Critical Accounting Policies and Estimates

Our consolidated financial statements have been prepared in conformity with generally accepted accounting principles in the United States (“U.S. GAAP”), which often requires the judgment of management in the selection and application of certain accounting principles and methods. Management believes that the quality and reasonableness of our most critical policies enable the fair presentation of our financial position and results of operations. However, investors are cautioned that the sensitivity of financial statements to these methods, assumptions and estimates could create materially different results under different conditions or using different assumptions.

Below are those policies applied in preparing our financial statements that management believes are the most dependent on the application of estimates and assumptions. For additional significant accounting policies, see Note 1, “Summary of Significant Accounting Policies,” in the notes to the consolidated financial statements included herein.

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Revenue Recognition – The Company recognizes revenue from contracts with customers using the five step model prescribed in ASC 606. A substantial portion of the Company's revenue is recorded at a point-in-time basis. Revenue is recognized from the sale of products or services when obligations under the terms of the contract are satisfied and control of promised goods or services has transferred to the customer. Control is transferred when the customer has the ability to direct the use of and obtain benefits from the goods or services. Revenue is measured at the amount of consideration the Company expects to be paid in exchange for goods or services. In a limited number of contracts, control transfers to the customer over time, primarily in contracts where the customer is required to pay for the cost of both the finished and unfinished goods at the time of cancellation plus a reasonable profit relative to the work performed for products that were customized for the customer. Therefore, we recognize revenue over time for those agreements that have a right to margin and where the products being produced have no alternative use. For agreements with multiple performance obligations, judgment is required to determine whether performance obligations specified in these agreements are distinct and should be accounted for as separate revenue transactions for recognition purposes based on the standalone selling price of each performance obligation. The primary method used to estimate a standalone selling price is the price observed in standalone sales to customers for the same product or service. We consider the contractual consideration payable by the customer and assess variable consideration that may affect the total transaction price. Variable consideration is included in the estimated transaction price when there is a basis to reasonably estimate the amount, including whether the estimate should be constrained in order to avoid a significant reversal of revenue in a future period. These estimates are based on historical experience, anticipated performance under the terms of the contract and our best judgment at the time.

Goodwill and Other Intangible Assets – In accordance with ASC 805, “Business Combinations,” the Company uses the acquisition method of accounting to allocate costs of acquired businesses to the assets acquired and liabilities assumed based on their estimated fair values at the dates of acquisition. The excess costs of acquired businesses over the fair values of the assets acquired and liabilities assumed are recognized as goodwill. Intangible assets other than goodwill are recognized if the benefit of the intangible asset is obtained through contractual or other legal rights, or if the intangible asset can be sold, transferred, licensed or exchanged, regardless of the Company’s intent to do so. Other intangible assets consist of identifiable intangibles acquired or recognized in accounting for the acquisitions (trademarks, trade names, technology, customer relationships, order backlog and other intangible assets). The valuations of the acquired assets and liabilities will impact the determination of future operating results. Management determines fair value using a discounted future cash flow analysis or other accepted valuation techniques. Determining the fair value of assets acquired and liabilities assumed requires management’s judgment and often involves the use of significant estimates and assumptions, including assumptions with respect to future cash inflows and outflows, revenue growth rates and earnings before interest, taxes, depreciation and amortization (“EBITDA”) margins, discount rates, customer attrition rates, royalty rates, asset lives and market multiples, among other items. We determine the fair values of intangible assets acquired generally in consultation with third-party valuation advisors. Fair value adjustments to the Company’s assets and liabilities are recognized and the results of operations of the acquired business are included in our consolidated financial statements from the effective date of the merger or acquisition.

Goodwill and identifiable intangible assets are recorded at their estimated fair value on the date of acquisition and are reviewed at least annually for impairment based on cash flow projections and fair value estimates.

U.S. GAAP requires that the annual, and any interim, goodwill impairment assessment be performed at the reporting unit level. Our reporting units have been identified at the operating unit level, which is one level below our operating segments. Substantially all goodwill was determined and recognized for each reporting unit pursuant to the accounting for the merger or acquisition as of the date of each transaction. With respect to acquisitions integrated into an existing reporting unit, any acquired goodwill is combined with the goodwill of the reporting unit.

Companies may perform a qualitative assessment as the initial step in the annual goodwill impairment testing process for all or selected reporting units. Companies are also allowed to bypass the qualitative analysis and perform a quantitative analysis if desired. Economic uncertainties and the length of time from the calculation of a baseline fair value are factors that we consider in determining whether to perform a quantitative test.

When we evaluate the potential for goodwill impairment using a qualitative assessment, we consider factors including, but not limited to, macroeconomic conditions, industry conditions, the competitive environment, changes in the market for our products and services, regulatory and political developments, entity specific factors such as strategy and changes in key personnel and overall financial performance. If, after completing this assessment, it is determined that it is more-likely-than-not that the fair value of a reporting unit is less than its carrying value, we proceed to a quantitative impairment test. For the quantitative test, management determines the estimated fair value through the use of a discounted cash flow valuation model incorporating discount rates commensurate with the risks involved for each reporting unit. If the estimated fair value of the reporting unit is less than the current carrying value, impairment of goodwill of the reporting unit is recognized. The key assumptions used in the discounted cash flow valuation model for impairment testing include discount rates, revenue growth rates and EBITDA margins, cash flow projections and terminal value rates. Discount rates are set by using the weighted average cost of capital (“WACC”) methodology. The WACC methodology considers market and industry data in determining the appropriate discount rates to be used, inclusive of company-specific risk factors. The Company utilizes a third party valuation firm to assist in the determination of the WACC. The discount rate utilized for each reporting unit is indicative of the return an investor would expect to receive for investing in such a business.

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Management, considering industry and company-specific historical and projected data, develops growth rates, sales projections and cash flow projections for each reporting unit. Terminal value rate determination follows a common methodology of capturing the present value of perpetual cash flow estimates beyond the last projected period assuming a constant WACC and low long-term growth rates.

The impairment test for indefinite-lived intangible assets consists of a comparison between the estimated fair values and carrying values. If the carrying amounts of intangible assets that have indefinite useful lives exceed their estimated fair values, an impairment loss will be recognized in an amount equal to the difference. Management utilizes the royalty savings valuation method to determine the estimated fair value for each indefinite-lived intangible asset. In this method, management estimates the royalty savings arising from the ownership of the intangible asset. The key assumptions used in estimating the royalty savings for impairment testing include discount rates, royalty rates, growth rates, sales projections and terminal value rates. Discount rates used are similar to the rates developed by the WACC methodology, inclusive of considering any differences in company-specific risk factors between reporting units and the indefinite-lived intangible assets. Royalty rates are established by management with the advice of valuation experts. Management, considering industry and company-specific historical and projected data, develops growth rates and sales projections for each significant intangible asset. Terminal value rate determination follows common methodology of capturing the present value of perpetual sales estimates beyond the last projected period assuming a constant WACC and low long-term growth rates.

The discounted cash flow and royalty savings valuation methodologies require management to make certain assumptions based upon information available at the time the valuations are performed. Actual results could differ from these assumptions. Management believes the assumptions used are reflective of what a market participant would have used in calculating fair value considering the current economic conditions.

As of the first day of the fourth quarter of fiscal 2026, the date of the annual impairment test, no indefinite-lived intangible assets or goodwill was determined to be impaired. As economic and market conditions have not changed significantly since the first day of the fourth quarter and no other indicators of impairment were identified, this conclusion remains appropriate as of September 30, 2026.

Income Taxes – The Company estimates income taxes in each jurisdiction in which it operates. This involves estimating taxable earnings, specific taxable and deductible items, the likelihood of generating sufficient future taxable income to utilize deferred tax assets and possible exposures related to future tax audits. To the extent these estimates change, adjustments to deferred and accrued income taxes are made in the period in which the changes occur. Historically, such adjustments have not been significant.

New Accounting Pronouncements

For information about new accounting pronouncements, see Note 1, “Summary of Significant Accounting Policies,” in the notes to the consolidated financial statements included herein.

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Non-GAAP Financial Measures

We present below certain financial information based on our EBITDA and EBITDA As Defined. References to “EBITDA” mean earnings before interest, taxes, depreciation and amortization, and references to “EBITDA As Defined” mean EBITDA plus, as applicable for each relevant period, certain adjustments as set forth in the reconciliations of net income to EBITDA and EBITDA As Defined and the reconciliations of net cash provided by operating activities to EBITDA and EBITDA As Defined presented below.

Neither EBITDA nor EBITDA As Defined is a measurement of financial performance under U.S. GAAP. We present EBITDA and EBITDA As Defined because we believe they are useful indicators for evaluating operating performance and liquidity.

Our management believes that EBITDA and EBITDA As Defined are useful as indicators of liquidity because securities analysts, investors, rating agencies and others use EBITDA to evaluate a company’s ability to incur and service debt. In addition, EBITDA As Defined is useful to investors because the revolving credit facility under our senior secured credit facility requires compliance under certain circumstances, on a pro forma basis, with a financial covenant that measures the ratio of the amount of our secured indebtedness to the amount of our Consolidated EBITDA defined in the same manner as we define EBITDA As Defined herein.

In addition to the above, our management uses EBITDA As Defined to review and assess the performance of the management team in connection with employee incentive programs and to prepare its annual budget and financial projections. Moreover, our management uses EBITDA As Defined to evaluate acquisitions.

Although we use EBITDA and EBITDA As Defined as measures to assess the performance of our business and for the other purposes set forth above, the use of these non-GAAP financial measures as analytical tools has limitations, and you should not consider any of them in isolation, or as a substitute for analysis of our results of operations as reported in accordance with U.S. GAAP. Some of these limitations are:

•neither EBITDA nor EBITDA As Defined reflects the significant interest expense, or the cash requirements, necessary to service interest payments on our indebtedness;

•although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the future, and neither EBITDA nor EBITDA As Defined reflects any cash requirements for such replacements;

•the omission of the substantial amortization expense associated with our intangible assets further limits the usefulness of EBITDA and EBITDA As Defined;

•neither EBITDA nor EBITDA As Defined includes the payment of taxes, which is a necessary element of our operations; and

•EBITDA As Defined excludes the cash expense we have incurred to integrate acquired businesses into our operations, which is a necessary element of certain of our acquisitions.

Because of these limitations, EBITDA and EBITDA As Defined should not be considered as measures of discretionary cash available to us to invest in the growth of our business. Management compensates for these limitations by not viewing EBITDA or EBITDA As Defined in isolation and specifically by using other U.S. GAAP measures, such as net income, net sales and operating profit, to measure our operating performance. Neither EBITDA nor EBITDA As Defined is a measurement of financial performance under U.S. GAAP, and neither should be considered as an alternative to net income or cash flow from operations determined in accordance with U.S. GAAP. Our calculation of EBITDA and EBITDA As Defined may not be comparable to the calculation of similarly titled measures reported by other companies.

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The following table sets forth a reconciliation of net income to EBITDA and EBITDA As Defined (in millions):


	Fiscal Years Ended September 30,
	2026		2025
Net Income	$	2,108	$	2,074
Adjustments:
Depreciation and amortization expense	445		367
Interest expense-net	2,008		1,572
Income tax provision	656		555
EBITDA	5,217		4,568
Adjustments:
Acquisition transaction and integration-related expenses (1)	101		42
Non-cash stock and deferred compensation expense (2)	158		157
Refinancing costs (3)	28		11
Other, net (4)	59		(18)
EBITDA As Defined	$	5,563	$	4,760



(1)						Represents costs incurred to integrate acquired businesses into our operations; facility relocation costs and other acquisition-related costs; transaction and valuation-related costs for acquisitions comprising deal fees, legal, financial and tax due diligence expenses; and amortization expense of inventory step-up recorded in connection with the purchase accounting of acquired businesses.

(2)						Represents the compensation expense recognized under our stock option plans and deferred compensation plans.

(3)						Represents costs expensed related to debt financing activities, including new issuances, extinguishments, refinancings and amendments to existing agreements.

(4)						Primarily represents foreign currency transaction gains or losses, payroll withholding taxes related to dividend equivalent payments and stock option exercises, non-service related pension costs, deferred compensation payments and other miscellaneous income or expense, such as gain on sale of business.

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The following table sets forth a reconciliation of net cash provided by operating activities to EBITDA and EBITDA As Defined (in millions):


	Fiscal Years Ended September 30,
	2026		2025
Net cash provided by operating activities	$	2,187	$	2,038
Adjustments:
Changes in assets and liabilities, net of effects from acquisitions and sales of businesses	647		589
Interest expense-net (1)	1,961		1,534
Income tax provision-current	608		565


Refinancing costs (2)	(28)		(11)
Gain on sale of businesses, net	—		10
Non-cash stock and deferred compensation expense (3)	(158)		(157)

EBITDA	5,217		4,568
Adjustments:
Acquisition transaction and integration-related expenses (4)	101		42
Non-cash stock and deferred compensation expense (3)	158		157
Refinancing costs (2)	28		11
Other, net (5)	59		(18)
EBITDA As Defined	$	5,563	$	4,760



(1)						Represents interest expense, net of interest income, excluding the amortization of debt issuance costs and discount on debt.

(2)						Represents costs expensed related to debt financing activities, including new issuances, extinguishments, refinancings and amendments to existing agreements.

(3)						Represents the compensation expense recognized under our stock option plans and deferred compensation plans.

(4)						Represents costs incurred to integrate acquired businesses into our operations; facility relocation costs and other acquisition-related costs; transaction and valuation-related costs for acquisitions comprising deal fees, legal, financial and tax due diligence expenses; and amortization expense of inventory step-up recorded in connection with the purchase accounting of acquired businesses.

(5)						Primarily represents foreign currency transaction gains or losses, payroll withholding taxes related to dividend equivalent payments and stock option exercises, non-service related pension costs, deferred compensation payments and other miscellaneous income or expense, such as gain on sale of business.

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ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

At September 30, 2026, we had borrowings under our Term Loans Facility, which consists of five tranches of term loans of approximately $12,803 million, as well as $875 million from the Securitization Facility, that are subject to interest rate risk, particularly movements in Term SOFR. Borrowings under our term loans bear interest, at our option, at a rate equal to either an alternate base rate or an adjusted Term SOFR for a one-, three- or six-month (in each case, subject to the availability thereof) interest period chosen by us, in each case, plus an applicable margin percentage. Our Securitization Facility bears interest at a rate of Term SOFR plus 1.35%. Accordingly, the Company’s cash flows and earnings will be exposed to the market risk of interest rate changes resulting from variable rate borrowings under our term loans. The Company's objective is to maintain an allocation of at least 75% fixed rate and no more than 25% variable rate debt thereby limiting its exposure to changes in near-term interest rates. Interest rate swaps and collars used to hedge and offset, respectively, the variable interest rates on the credit facility are described in Note 18, “Derivatives and Hedging Activities,” in the notes to the consolidated financial statements included herein. We do not hold or issue derivative instruments for speculative purposes. As of September 30, 2026, approximately 75% of our gross debt was fixed rate. The effect of a hypothetical one percentage point increase in interest rates would increase the annual interest costs under our Term Loans Facility and Securitization Facility by approximately $95 million based on the amount of outstanding borrowings at September 30, 2026. The weighted average interest rate on the $12,803 million of the term loans and the $875 million drawn on the Securitization Facility at September 30, 2026 was approximately 6.0%.

For information about the fair value of the aggregate principal amount of borrowings under our term loans and the fair value of the senior secured and subordinated notes, refer to Note 11, “Fair Value Measurements,” in the notes to the consolidated financial statements included herein.

Foreign Currency Risk

Certain of our foreign subsidiaries’ sales and results of operations are subject to the impact of foreign currency fluctuations, primarily the British pound and the euro. Because our consolidated financial statements are presented in U.S. dollars, increases or decreases in the value of the U.S. dollar relative to other currencies in which we transact business could materially adversely affect our net sales, net income and the carrying values of our assets located outside the U.S. Foreign currency forward exchange contracts provide for the purchase or sale of foreign currencies at specified future dates at specified exchange rates, and are used to offset changes in the fair value of certain assets or liabilities or forecasted cash flows resulting from transactions denominated in foreign currencies. The foreign currency forward exchange contracts entered into by the Company are described in Note 18, “Derivatives and Hedging Activities,” in the notes to the consolidated financial statements included herein. A 10% change in foreign currency exchange rates would not have resulted in a material impact to net income for the fiscal year ended September 30, 2026.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The information required by this Item is contained on pages F-1 through F-40 of this Report.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

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ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

As of September 30, 2026, TD Group carried out an evaluation, under the supervision and with the participation of TD Group’s management, including its President and Chief Executive Officer (Principal Executive Officer) and Chief Financial Officer (Principal Financial Officer), of the effectiveness of the design and operation of TD Group’s disclosure controls and procedures. Based upon that evaluation, the President and Chief Executive Officer and Chief Financial Officer concluded that TD Group’s disclosure controls and procedures are effective to ensure that information required to be disclosed by TD Group in the reports it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified by the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to TD Group’s management, including its President and Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, TD Group’s management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in designing and evaluating the controls and procedures.

Management’s Report on Internal Control Over Financial Reporting

The management of TD Group is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Exchange Act Rule 13a-15(f). Using criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (“COSO”) in Internal Control-Integrated Framework, TransDigm’s management assessed the effectiveness of the Company’s internal control over financial reporting as of September 30, 2026. Based on our assessment, management concluded that the Company’s internal control over financial reporting was effective as of September 30, 2026.

During fiscal 2026, the Company completed the acquisitions of Simmonds, JPE and VSA and Prince & Izant. The Company is currently integrating the acquisitions into its operations, compliance programs and internal control processes. As permitted by SEC rules and regulations, the Company has excluded these acquisitions from management's evaluation of internal controls over financial reporting as of September 30, 2026. These acquisitions constituted approximately 16.8% of the Company’s total assets (inclusive of acquired intangible assets and goodwill) as of September 30, 2026, and approximately 5.8% and 2.8% of the Company’s net sales and income from continuing operations before income taxes, respectively, for the fiscal year ended September 30, 2026.

The effectiveness of the Company’s internal control over financial reporting as of September 30, 2026 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report, which is included elsewhere in this Annual Report on Form 10-K and is incorporated herein by reference.

Changes in Internal Control Over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting that occurred during the fourth quarter of fiscal 2026 that materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of

TransDigm Group Incorporated

Opinion on Internal Control over Financial Reporting

We have audited TransDigm Group Incorporated’s internal control over financial reporting as of September 30, 2026, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the “COSO criteria”). In our opinion, TransDigm Group Incorporated (the “Company”) maintained, in all material respects, effective internal control over financial reporting as of September 30, 2026, based on the COSO criteria.

As indicated in the accompanying Management’s Report on Internal Control Over Financial Reporting, management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include the internal controls of Simmonds Precision Products, Inc. (“Simmonds”), Jet Parts Engineering (“JPE”), Victor Sierra Aviation Holdings (“VSA”) or Prince & Izant (“P&I”), which are included in the 2026 consolidated financial statements of the Company and constituted 16.8% of total assets as of September 30, 2026 and 5.8% and 2.8% of net sales and income from continuing operations before income taxes, respectively, for the fiscal year then ended. Our audit of internal control over financial reporting of the Company also did not include an evaluation of the internal control over financial reporting of Simmonds, JPE, VSA or P&I.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated balance sheets of the Company as of September 30, 2026 and 2025, the related consolidated statements of income, comprehensive income, changes in stockholders’ deficit and cash flows for each of the three fiscal years in the period ended September 30, 2026, and the related notes and our report dated November 10, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Cleveland, Ohio

November 10, 2026

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ITEM 9B. OTHER INFORMATION

On September 14, 2026, W. Nicholas Howley, Chairman of the Company’s Board of Directors, terminated a Rule 10b5-1 trading arrangement (as defined in Item 408 of Regulation S-K) that was adopted on February 18, 2026 and was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. The arrangement provided for the sale of up to 192,544 shares of the Company’s common stock and was scheduled to expire on August 31, 2027.

ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not applicable.

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Directors and Executive Officers

Information regarding TD Group’s directors will be set forth under the caption “Proposal No. 1 - Election of Directors” in our Proxy Statement, which is incorporated herein by reference. The following table sets forth certain information concerning TD Group’s executive officers:

Name

Age

Position

Michael Lisman

President and Chief Executive Officer

Patrick Murphy

Co-Chief Operating Officer

Joel Reiss

Co-Chief Operating Officer

Sarah Wynne

Chief Financial Officer

Armani Vadiee

General Counsel, Chief Compliance Officer and Secretary

Mr. Lisman was appointed President and Chief Executive Officer in October 2025. Prior to that, Mr. Lisman served as Co-Chief Operating Officer from May 2023 to September 2025, Chief Financial Officer from July 2018 to May 2023 and Executive Vice President from January 2022 to May 2023. Mr. Lisman also served as Vice President—Mergers and Acquisitions from January 2018 to June 2018, Business Unit Manager for the Air & Fuel Valves business unit at Aero Fluid Products, a wholly-owned subsidiary of TransDigm Inc., from January 2017 to January 2018 and Director of Mergers and Acquisitions of TransDigm from November 2015 to January 2017.

Mr. Murphy was appointed Co-Chief Operating Officer in August 2025. He previously served as Executive Vice President from October 2019 to August 2025 and as President of HarcoSemco from December 2014 to September 2019. Prior to joining TransDigm, Mr. Murphy was Vice President and General Manager for two Danaher Corporation businesses and held several other senior leadership roles in the industrial manufacturing and high-technology industries.

Mr. Reiss was appointed Co-Chief Operating Officer in May 2023. Prior to that, Mr. Reiss served as Executive Vice President from October 2015 to May 2023. Mr. Reiss also served as President of Hartwell Corporation, a wholly-owned subsidiary of TransDigm Inc., from July 2012 to October 2015; President of Skurka Aerospace, a wholly-owned subsidiary of TransDigm Inc., from July 2010 to July 2012; and Director of Operations of Adams Rite Aerospace, a wholly-owned subsidiary of TransDigm Inc., from July 2000 to July 2010.

Ms. Wynne was appointed Chief Financial Officer in May 2023. Prior to that, Ms. Wynne served as Chief Accounting Officer from November 2018 to May 2023. Ms. Wynne also served as Group Controller from April 2015 to October 2018, as Controller of the Aero Fluid Products division of AeroControlex Group, Inc., a wholly-owned subsidiary of TransDigm Inc., from October 2009 to March 2015, and previously in other accounting roles within the Company.

Mr. Vadiee was appointed General Counsel, Chief Compliance Officer, and Secretary in July 2025. Prior to this role, he served as TransDigm’s Vice President of Global Public Sector. Before joining TransDigm, Mr. Vadiee was a partner at a Washington D.C.-based law firm where he served as outside counsel to TransDigm for over ten years, developing a deep understanding of the Company’s operations and regulatory environment.

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Code of Ethics

We have adopted a Code of Business Conduct and Ethics, which applies to all of our directors, officers, and employees and a Code of Ethics for Senior Financial Officers which includes additional ethical obligations for our senior financial management (which includes our president and chief executive officer, chief operating officer(s), chief financial officer, corporate controller, treasurer, vice president of finance, director of audit, group controllers, general counsel, operating unit presidents and operating unit vice presidents of finance). Please refer to the information set forth in our Proxy Statement, which is incorporated herein by reference. Our Code of Business Conduct and Ethics and our Code of Ethics for Senior Financial Officers are available on our website at www.transdigm.com. Any person may receive a copy without charge by writing to us at TransDigm Group Incorporated, 1350 Euclid Avenue, Suite 1600, Cleveland, Ohio 44115. We intend to disclose on our website any amendment to, or waiver from, a provision of our Code of Business Conduct and Ethics that applies to directors and executive officers and that is required to be disclosed pursuant to the rules of the Securities and Exchange Commission.

Nominations of Directors

The procedure by which stockholders may recommend nominees to our Board of Directors will be set forth under the caption “Stockholder Proposals for the 2027 Annual Meeting” in our Proxy Statement, which is incorporated herein by reference.

Audit Committee

The information regarding the audit committee of our Board of Directors and audit committee financial experts will be set forth under the caption “Corporate Governance” in our Proxy Statement, which is incorporated herein by reference.

Insider Trading Policy

We have adopted an insider trading policy governing the purchase, sale and other dispositions of our securities by our directors, officers and employees, and by the Company itself, that we believe is reasonably designed to promote compliance with insider trading laws, rules and regulations and the listing standards applicable to us. A copy of our insider trading policy is incorporated by reference as Exhibit 19.1 to this Annual Report on Form 10-K.

The remaining information required by this Item, including information required by Item 405 of Regulation S-K, to the extent applicable, will be set forth in our Proxy Statement and is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

The information required by this item will be set forth under the captions “Executive Compensation” and “Director Compensation” in our Proxy Statement, which is incorporated herein by reference.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information regarding security ownership of certain beneficial owners and management will be set forth under the captions “Beneficial Ownership of Equity Securities of TransDigm” and “Security Ownership of Certain Beneficial Owners” in our Proxy Statement, which is incorporated herein by reference.

Equity Compensation Plan Information


Plan category	Number of Securities to Be Issued upon Exercise of Outstanding Options, Warrants and Rights (a)		Weighted-Average Exercise Price of Outstanding Options, Warrants and Rights (b)		Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (excluding securities reflected in column (a)) (c)
Equity compensation plans approved by security holders (1)	3,903,759	(2)	$	715.83	2,708,865	(3)

(1)Includes information related to the 2014 stock option plan and the 2019 stock option plan.

(2)This amount represents 2,662,535 and 1,241,224 shares subject to outstanding stock options under our 2014 stock option plan and 2019 stock option plan, respectively. No further grants may be made under our 2014 stock option plan, although outstanding stock options continue in force in accordance with their terms.

(3)This amount represents remaining shares available for award under our 2019 stock option plan. In August 2019, the 2019 stock option plan was adopted by the Board of Directors of TD Group and was subsequently approved by stockholders on October 3, 2019. The 2019 stock option plan permits TD Group to award stock options to our key employees, directors or consultants. The total number of shares of TD Group common stock reserved for issuance or delivery under the 2019 stock option plan is 4,000,000, subject to adjustment in the event of any stock dividend or split, reorganization, recapitalization, merger, share exchange or any other similar corporate transaction or event.

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ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this item will be set forth under the captions entitled “Corporate Governance” and “Director Compensation” in our Proxy Statement, which is incorporated herein by reference.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this item will be set forth under the caption “Proposal No. 2 - Ratification of Appointment of Independent Registered Public Accounting Firm,” in our Proxy Statement, which is incorporated herein by reference.

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PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a) Documents Filed with Report

(a) (1) Financial Statements


			Page
Report of Independent Registered Public Accounting Firm (Ernst & Young LLP, PCAOB ID: 42)			F-1
Consolidated Balance Sheets as of September 30, 2026 and 2025			F-3
Consolidated Statements of Income for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-4
Consolidated Statements of Comprehensive Income for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-5
Consolidated Statements of Changes in Stockholders’ Deficit for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-6
Consolidated Statements of Cash Flows for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-7
Notes to Consolidated Financial Statements for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-8 to F-40

(a) (2) Financial Statement Schedules

Financial statement schedules have been omitted because they are not applicable, not required, or the required information is included in the consolidated financial statements or notes thereto.

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(a) (3) Exhibits

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

3.1

Second Amended and Restated Certificate of Incorporation, filed April 28, 2014, of TransDigm Group Incorporated

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed April 28, 2014 (File No. 001-32833)

3.2

Third Amended and Restated Bylaws of TransDigm Group Incorporated

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed January 30, 2018 (File No. 001-32833)

4.1

Form of Stock Certificate

Incorporated by reference to Amendment No. 3 to TransDigm Group Incorporated’s Form S-1 filed March 13, 2006 (File No. 333-130483)

4.2

Indenture, dated as of January 20, 2021, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to TransDigm Inc.’s 4.625% Senior Subordinated Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed January 20, 2021 (File No. 001-32833)

4.3

Indenture, dated as of April 21, 2021, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to TransDigm Inc.’s 4.875% Senior Subordinated Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed April 21, 2021 (File No. 001-32833)

4.4

Indenture, dated as of February 24, 2023, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.750% Senior Secured Notes due 2028

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed February 24, 2023 (File No. 001-32833)

4.5

First Supplemental Indenture, dated as of March 9, 2023, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.750% Senior Secured Notes due 2028

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed March 9, 2023 (File No. 001-32833)

4.6

Indenture, dated as of August 18, 2023, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.875% Senior Secured Notes due 2030

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed August 18, 2023 (File No. 001-32833)

4.7

Indenture, dated as of November 28, 2023, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 7.125% Senior Secured Notes due 2031

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed November 28, 2023 (File No. 001-32833)

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Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

4.8

Indenture, dated as of February 27, 2024, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.375% Senior Secured Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 28, 2024 (File No. 001-32833)

4.9

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 28, 2024 (File No. 001-32833)

4.10

First Supplemental Indenture, dated as of March 22, 2024, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, to the Indenture, dated as of February 27, 2024, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s additional 6.375% Senior Secured Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed March 22, 2024 (File No. 001-32833)

4.11

Indenture, dated as of September 19, 2024, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.000% Senior Secured Notes due 2033

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed September 20, 2024 (File No. 001-32833)

4.12

Indenture, dated as of May 20, 2025, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to TransDigm Inc.’s 6.375% Senior Subordinated Notes due 2033

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 20, 2025 (File No. 001-32833)

4.13

Indenture, dated as of August 19, 2025, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.250% Senior Secured Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 20, 2025 (File No. 001-32833)

4.14

Indenture, dated as of August 19, 2025, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to TransDigm Inc.’s 6.750% Senior Subordinated Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 20, 2025 (File No. 001-32833)

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Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

4.15

Indenture, dated as of February 13, 2026, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to TransDigm Inc.’s 6.125% Senior Subordinated Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 13, 2026 (File No. 001-32833)

4.16

First Supplemental Indenture, dated as of April 17, 2026, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A., as trustee, relating to TransDigm Inc.’s 6.125% Senior Subordinated Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed April 17, 2026 (File No. 001-32833)

4.17

Indenture, dated as of September 28, 2026, among TransDigm Inc., as issuer, TransDigm Group Incorporated, as a guarantor, the subsidiary guarantors party thereto, The Bank of New York Mellon Trust Company, N.A., as trustee and US collateral agent, and The Bank of New York Mellon, as UK collateral agent, relating to TransDigm Inc.’s 6.75% Senior Secured Notes due 2035

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed September 28, 2026 (File No. 001-32833)

4.1 8

Form of Supplemental Indenture to Add New Guarantors

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 19, 2019 (File No. 001-32833)

4.1 9

Form of TransDigm Inc.’s 4.625% Senior Subordinated Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed January 20, 2021 (File No. 001-32833)

4.20

Form of TransDigm Inc.’s 4.875% Senior Subordinated Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed April 21, 2021 (File No. 001-32833)

4.21

Form of TransDigm Inc.’s 6.750% Senior Secured Notes due 2028

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed February 24, 2023 (File No. 001-32833)

4.22

Form of TransDigm Inc.’s 6.875% Senior Secured Notes due 2030

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed August 18, 2023 (File No. 001-32833)

4.2 3

Form of TransDigm Inc.’s 7.125% Senior Secured Notes due 2031

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed November 28, 2023 (File No. 001-32833)

4.2 4

Form of TransDigm Inc.’s 6.375% Senior Secured Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 28, 2024 (File No. 001-32833)

4.2 5

Form of TransDigm Inc.’s 6.625% Senior Secured Notes due 2032

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 28, 2024 (File No. 001-32833)

4.2 6

Form of TransDigm Inc.’s additional 6.375% Senior Secured Notes due 2029

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed March 22, 2024 (File No. 001-32833)

4.2 7

Form of TransDigm Inc.’s 6.000% Senior Secured Notes due 2033

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed September 20, 2024 (File No. 001-32833)

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Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

4.2 8

Form of TransDigm Inc.’s 6.375% Senior Subordinated Notes due 2033

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 20, 2025 (File No. 001-32833)

4.2 9

Form of TransDigm Inc.’s 6.250% Senior Secured Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 20, 2025 (File No. 001-32833)

4.30

Form of TransDigm Inc.’s 6.750% Senior Subordinated Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 20, 2025 (File No. 001-32833)

4.31

Form of TransDigm Inc.’s 6.125% Senior Subordinated Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 13, 2026 (File No. 001-32833)

4.3 2

Form of TransDigm Inc.’s additional 6.125% Senior Subordinated Notes due 2034

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed April 17, 2026 (File No. 001-32833)

4.3 3

Form of TransDigm Inc.’s 6.750% Senior Secured Notes due 2035

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed September 28, 2026 (File No. 001-32833)

4.3 4

Description of Securities

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 19, 2019 (File No. 001-32833)

10.1

Option Agreement dated August 6, 2021 between the Company and W. Nicholas Howley*

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 10, 2021 (File No. 001-32833)

10.2

Amended and Restated Employment Agreement, dated October 1, 2025, between the Company and Michael Lisman*

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed October 1, 2025 (File No. 001-32833)

10.3

Amended and Restated Employment Agreement, dated July 26, 2023, between TransDigm Group Incorporated and Joel Reiss*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 9, 2023 (File No. 001-32833)

10.4

Amended and Restated Employment Agreement, dated July 26, 2023, between TransDigm Group Incorporated and Sarah Wynne*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 9, 2023 (File No. 001-32833)

10.5

Amended and Restated Employment Agreement, dated August 5, 2025, between the Company and Patrick J. Murphy*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 12, 2025 (File No. 001-32833)

10.6

Employment Agreement, dated July 7, 2025, between the Company and Armani Vadiee*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 12, 2025 (File No. 001-32833)

10.7

Amended and Restated TransDigm Group Incorporated 2014 Stock Option Plan*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 7, 2019 (File No. 001-32833)

10.8

TransDigm Group Incorporated 2019 Stock Option Plan*

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed October 4, 2019 (File No. 001-32833)

10.9

TransDigm Group Incorporated 2019 Stock Option Plan Dividend Equivalent Plan*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 9, 2023 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.1 0

TransDigm Group Incorporated 2016 Director Share Plan*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed February 10, 2016 (File No. 001-32833)

10.1 1

Form of Stock Option Agreement for options awarded in fiscal 2022*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 16, 2021 (File No. 001-32833)

10.1 2

Form of Stock Option Agreement for options awarded in fiscal 2023*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 10, 2022 (File No. 001-32833)

10.1 3

Form of Stock Option Grant Notice and Agreement for executive officers under the TransDigm Group Incorporated 2019 Stock Option Plan (or TransDigm Group Incorporated 2014 Stock Option Plan) for options awarded in fiscal 2024*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 9, 2023 (File No. 001-32833)

10.1 4

Form of Stock Option Grant Notice and Agreement for directors under the TransDigm Group Incorporated 2019 Stock Option Plan for options awarded in fiscal 2024*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 9, 2023 (File No. 001-32833)

10.1 5

Form of Stock Option Grant Notice and Agreement for executive officers under the TransDigm Group Incorporated 2019 Stock Option Plan for options awarded in fiscal 2025*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 7, 2024 (File No. 001-32833)

10.1 6

Form of Stock Option Grant Notice and Agreement for directors under the TransDigm Group Incorporated 2019 Stock Option Plan for options awarded in fiscal 2025*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 7, 2024 (File No. 001-32833)

10.1 7

Form of Stock Option Agreement for Director and NEO options awarded in fiscal 2026*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 12, 2025 (File No. 001-32833)

10.18

Form of Stock Option Agreement for Director and NEO options awarded in fiscal 2027*

Filed Herewith

10.19

Amended and Restated TransDigm Group Incorporated 2014 Stock Option Plan Dividend Equivalent Plan*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 9, 2022 (File No. 001-32833)

10.2 0

Amendment to Amended and Restated TransDigm Group Incorporated 2014 Stock Option Plan Dividend Equivalent Plan*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 10, 2022 (File No. 001-32833)

10.2 1

Form of Amendment to Director Options to Effect Changes in Dividend Equivalent Payment Method*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 9, 2022 (File No. 001-32833)

10.2 2

Amendment and Restatement Agreement, and Second Amendment and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. from time to time party thereto, the lenders party thereto, as lenders, and Credit Suisse AG, as administrative agent

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed June 6, 2014 (File No. 001-32833)

10.2 3

Incremental Assumption and Refinancing Facility Agreement, dated as of May 14, 2015, among TransDigm Inc., TransDigm Group Incorporated, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent, and the other agents and lenders named therein

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 19, 2015 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.2 4

Loan Modification Agreement, dated as of May 20, 2015, among TransDigm Inc., TransDigm Group Incorporated, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent, and the other agents and lenders party thereto

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 27, 2015 (File No. 001-32833)

10.2 5

Incremental Revolving Credit Assumption and Refinancing Facility Agreement, dated as of May 20, 2015, among TransDigm Inc., TransDigm Group Incorporated, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent and the other agents and lenders party thereto

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 27, 2015 (File No. 001-32833)

10.2 6

Incremental Term Loan Assumption Agreement dated October 14, 2016 among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. party thereto, the lenders party thereto and Credit Suisse AG, as administrative and collateral agent

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed October 14, 2016 (File No. 001-32833)

10.2 7

Amendment No. 2 to the Second Amended and Restated Credit Agreement, dated as of March 6, 2017, among TransDigm Inc., as borrower, TransDigm Group Incorporated, as guarantor, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent, and the other agents and lenders named therein

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed March 8, 2017 (File No. 001-32833)

10.2 8

Amendment No. 3 to the Second Amended and Restated Credit Agreement, dated as of August 22, 2017, among TransDigm Inc., as borrower, TransDigm Group Incorporated, as guarantor, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent, and the other agents and lenders named therein

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 24, 2017 (File No. 001-32833)

10.29

Amendment No. 4 to the Second Amended and Restated Credit Agreement, dated as of November 30, 2017, among TransDigm Inc., as borrower, TransDigm Group Incorporated, as guarantor, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent, and the other agents and lenders named therein

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed December 6, 2017 (File No. 001-32833)

10.30

Refinancing Facility Agreement to the Second Amended and Restated Credit Agreement, dated as of February 22, 2018, among TransDigm Inc., as borrower, TransDigm Group Incorporated, as guarantor, the subsidiary guarantors party thereto, Credit Suisse AG, as administrative agent and collateral agent, and the other agents and lenders named therein

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 22, 2018 (File No. 001-32833)

10.3 1

Amendment No. 5, Incremental Assumption Agreement and Refinancing Facility Agreement, dated as of May 30, 2018, relating to the Second Amended and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Credit Suisse AG, as administrative agent and collateral agent for the lenders

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 31, 2018 (File No. 001-32833)

10.3 2

Amendment No. 6 and Incremental Revolving Credit Assumption Agreement, dated as of March 14, 2019, to the Second Amended and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Credit Suisse AG, as administrative agent and collateral agent for the lenders

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed March 14, 2019 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.3 3

Amendment No. 7 and Refinancing Facility Agreement, dated as of February 6, 2020, to the Second Amended and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Credit Suisse AG, as administrative agent and collateral agent for the lenders

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 6, 2020 (File No. 001-32833)

10.3 4

Amendment No. 8 and Loan Modification Agreement, dated as of May 24, 2021, to the Second Amended and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Credit Suisse AG, as administrative agent and collateral agent for the lenders

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed May 25, 2021 (File No. 001-32833)

10.3 5

Amendment No. 9 and Incremental Revolving Credit Assumption Agreement, dated as of December 29, 2021, to the Second Amended and Restated Credit Agreement, dated as of June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Credit Suisse AG, as administrative agent and collateral agent for the lenders

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed December 30, 2021 (File No. 001-32833)

10.3 6

Amendment No. 10, Loan Modification Agreement and Refinancing Facility Agreement, dated December 14, 2022, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent (as successor to Credit Suisse AG) for the lenders

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed December 14, 2022 (File No. 001-32833)

10.3 7

Amendment No. 11, Loan Modification Agreement and Refinancing Facility Agreement, dated February 24, 2023, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated's Form 8-K, filed February 24, 2023 (File No. 001-32833)

10.3 8

Amendment No. 12 to the Second Amended and Restated Credit Agreement, dated June 16, 2023, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 8, 2023 (File No. 001-32833)

10.39

Amendment No. 13 and Incremental Term Loan Assumption Agreement, dated November 28, 2023, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed November 28, 2023 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.40

Amendment No. 14 and Incremental Revolving Credit Assumption Agreement, dated February 27, 2024, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 28, 2024 (File No. 001-32833)

10.4 1

Amendment No. 15, Loan Modification Agreement and Refinancing Facility Agreement, dated March 22, 2024, relating to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders and Amendment, dated March 22, 2024, relating to the Guarantee and Collateral Agreement, dated June 23, 2006, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed March 22, 2024 (File No. 001-32833)

10.4 2

Amendment No. 16, Loan Modification Agreement and Refinancing Facility Agreement, dated June 4, 2024, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed June 4, 2024 (File No. 001-32833)

10.4 3

Amendment No. 17 and Incremental Revolving Credit Assumption Agreement, dated September 19, 2024, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed September 20, 2024 (File No. 001-32833)

10.4 4

Amendment No. 18 and Incremental Term Loan Assumption Agreement, dated as of August 19, 2025, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 20, 2025 (File No. 001-32833)

10.4 5

Amendment No. 19, Loan Modification Agreement and Refinancing Facility Agreement, dated as of September 17, 2025, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed September 17, 202 5 (File No. 001-32833)

10.4 6

Amendment No. 20 and Incremental Term Loan Assumption Agreement, dated as of February 13, 2026, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed February 13, 2026 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.4 7

Amendment No. 21 and Incremental Term Loan Assumption Agreement, dated as of April 17, 2026, to the Second Amended and Restated Credit Agreement, dated June 4, 2014, among TransDigm Inc., TransDigm Group Incorporated, each subsidiary of TransDigm Inc. party thereto, the lenders party thereto, and Goldman Sachs Bank USA, as administrative agent and collateral agent for the lenders**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed April 17, 2026 (File No. 001-32833)

10.4 8

Guarantee and Collateral Agreement, dated as of June 23, 2006, as amended and restated as of December 6, 2010, as further amended and restated as of February 14, 2011 and February 28, 2013, among TransDigm Inc., TransDigm Group Incorporated, the subsidiaries of TransDigm Inc. named therein and Credit Suisse AG as administrative agent and collateral agent

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed March 6, 2013 (File No. 001-32833)

10.49

Receivables Purchase Agreement, dated October 21, 2013, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association as a Purchaser and a Purchaser Agent, the various other Purchasers and Purchaser Agents from time to time party thereto, and PNC National Association as Administrator

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed February 5, 2014 (File No. 001-32833)

10.5 0

First Amendment to the Receivables Purchase Agreement, dated March 25, 2014, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association as a Purchaser, Purchaser Agent for its Purchaser Group and as Administrator

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 13, 2015 (File No. 001-32833)

10.5 1

Second Amendment to the Receivables Purchase Agreement, dated August 8, 2014, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as a Purchaser Agent for its Purchaser Group and Administrator, and Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchase Agent for its Purchaser Group

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 13, 2015 (File No. 001-32833)

10.5 2

Third Amendment to the Receivables Purchase Agreement, dated March 20, 2015, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as a Purchaser Agent for its Purchaser Group and Administrator, Atlantic Asset Securitization LLC, as a Conduit Purchaser, and Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchase Agent for its and Atlantic’s Purchaser Group

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 13, 2015 (File No. 001-32833)

10.5 3

Fourth Amendment to the Receivables Purchase Agreement dated as of August 4, 2015, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as a Purchaser Agent for its Purchaser Group and Administrator, Atlantic Asset Securitization LLC, as a Conduit Purchaser, and Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchaser Agent for its and Atlantic’s Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 8-K, filed August 7, 2015 (File No. 001-32833)

10.5 4

Ninth Amendment to the Receivables Purchase Agreement dated as of August 1, 2017, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, Atlantic Asset Securitization LLC, as a Conduit Purchaser, Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchaser Agent for its and Atlantic’s Purchaser Group, and Fifth Third Bank, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 13, 2017 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.5 5

Tenth Amendment to the Receivables Purchase Agreement dated as of July 31, 2018, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, Atlantic Asset Securitization LLC, as a Conduit Purchaser, Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchaser Agent for its and Atlantic’s Purchaser Group, and Fifth Third Bank, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 8, 2018 (File No. 001-32833)

10.5 6

Eleventh Amendment to the Receivables Purchase Agreement dated as of July 30, 2019, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, Atlantic Asset Securitization LLC, as a Conduit Purchaser, Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchaser Agent for its and Atlantic’s Purchaser Group, and Fifth Third Bank, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 19, 2019 (File No. 001-32833)

10.5 7

Twelfth Amendment to the Receivables Purchase Agreement dated as of July 22, 2020, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, Atlantic Asset Securitization LLC, as a Conduit Purchaser, Credit Agricole Corporate and Investment Bank, as a Committed Purchaser and as a Purchaser Agent for its and Atlantic’s Purchaser Group, and Fifth Third Bank, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 12, 2020 (File No. 001-32833)

10.5 8

Thirteenth Amendment to the Receivables Purchase Agreement dated as of July 26, 2021, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Fifth Third Bank, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 16, 2021 (File No. 001-32833)

10.59

Fourteenth Amendment to the Receivables Purchase Agreement dated as of July 25, 2022, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Fifth Third Bank, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 10, 2022 (File No. 001-32833)

10.6 0

Fifteenth Amendment to the Receivables Purchase Agreement dated as of July 25, 2023, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Wells Fargo Bank, National Association, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 8, 2023 (File No. 001-32833)

10.6 1

Sixteenth Amendment to the Receivables Purchase Agreement dated as of May 28, 2024, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Wells Fargo Bank, National Association, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 7, 2024 (File No. 001-32833)

Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

10.6 2

Seventeenth Amendment to the Receivables Purchase Agreement dated as of July 12, 2024, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Wells Fargo Bank, National Association, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 6, 2024 (File No. 001-32833)

10.6 3

Eighteenth Amendment to the Receivables Purchase Agreement dated as of July 11, 2025, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Wells Fargo Bank, National Association, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 5, 2025 (File No. 001-32833)

10.6 4

Twentieth Amendment to the Receivables Purchase Agreement dated as of July 10, 2026, among TransDigm Receivables LLC, TransDigm Inc., PNC Bank, National Association, as a Committed Purchaser, as Purchaser Agent for its Purchaser Group and as Administrator, and Wells Fargo Bank, National Association, as a Committed Purchaser and as Purchaser Agent for its Purchaser Group**

Incorporated by reference to TransDigm Group Incorporated’s Form 10-Q, filed August 4, 2026 (File No. 001-32833)

19.1

TransDigm Group Incorporated Amended and Restated Insider Trading and Confidentiality Policy Statement*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 7, 2024 (File No. 001-32833)

21.1

Subsidiaries of TransDigm Group Incorporated

Filed Herewith

22.1

Listing of Subsidiary Guarantors

Filed Herewith

23.1

Consent of Independent Registered Public Accounting Firm

Filed Herewith

31.1

Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Filed Herewith

31.2

Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

Filed Herewith

32.1

Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Furnished Herewith

32.2

Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Furnished Herewith

TransDigm Group Incorporated Compensation Clawback Policy, dated October 2, 2023*

Incorporated by reference to TransDigm Group Incorporated’s Form 10-K, filed November 9, 2023 (File No. 001-32833)

101.INS

Inline XBRL Instance Document: The XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

Filed Herewith

101.SCH

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Inline XBRL Taxonomy Extension Calculation Linkbase

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Table of Contents

Exhibit No.

Description

Filed Herewith or Incorporated by Reference From

101.PRE

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Filed Herewith

104

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Filed Herewith



*			Indicates management contract or compensatory plan contract or arrangement.
**			Schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company hereby undertakes to furnish on a supplemental basis a copy of any omitted schedule or exhibit upon request by the Securities and Exchange Commission.

ITEM 16. FORM 10-K SUMMARY

None.

Table of Contents

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized on November 10, 2026.


TRANSDIGM GROUP INCORPORATED
By:			/s/ Sarah Wynne
Name:			Sarah Wynne
Title:			Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the registrant and in the capacities and as of the dates indicated.

Signature

Title

Date

/s/ Michael Lisman

President, Chief Executive Officer and Director
(Principal Executive Officer)

November 10, 2026

Michael Lisman

/s/ Sarah Wynne

Chief Financial Officer
(Principal Financial Officer and Principal Accounting Officer)

November 10, 2026

Sarah Wynne

/s/ W. Nicholas Howley

Chairman

November 10, 2026

W. Nicholas Howley

/s/ David A. Barr

Director

November 10, 2026

David A. Barr

/s/ Jane M. Cronin

Director

November 10, 2026

Jane M. Cronin

/s/ Michael Graff

Director

November 10, 2026

Michael Graff

/s/ Sean P. Hennessy

Director

November 10, 2026

Sean P. Hennessy

/s/ Irina I. Krasik

Director

November 10, 2026

Irina I. Krasik

/s/ Gary E. McCullough

Director

November 10, 2026

Gary E. McCullough

/s/ Pete Palmer

Director

November 10, 2026

Pete Palmer

/s/ Michele L. Santana

Director

November 10, 2026

Michele L. Santana

/s/ Robert J. Small

Lead Independent Director

November 10, 2026

Robert J. Small

Table of Contents

TRANSDIGM GROUP INCORPORATED AND SUBSIDIARIES

ANNUAL REPORT ON FORM 10-K:

FISCAL YEAR ENDED SEPTEMBER 30, 2026

ITEM 8 AND ITEM 15(a) (1)

FINANCIAL STATEMENTS INDEX


			Page
Financial Statements:
Report of Independent Registered Public Accounting Firm (Ernst & Young LLP, PCAOB ID: 42)			F-1
Consolidated Balance Sheets as of September 30, 2026 and 2025			F-3
Consolidated Statements of Income for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-4
Consolidated Statements of Comprehensive Income for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-5
Consolidated Statements of Changes in Stockholders’ Deficit for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-6
Consolidated Statements of Cash Flows for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-7
Notes to Consolidated Financial Statements for Fiscal Years Ended September 30, 2026, 2025 and 2024			F-8 to F-40

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of

TransDigm Group Incorporated

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of TransDigm Group Incorporated (the “Company”) as of September 30, 2026 and 2025, the related consolidated statements of income, comprehensive income, changes in stockholders’ deficit and cash flows for each of the three fiscal years in the period ended September 30, 2026, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at September 30, 2026 and 2025, and the results of its operations and its cash flows for each of the three fiscal years in the period ended September 30, 2026, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company's internal control over financial reporting as of September 30, 2026, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated November 10, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

F-1

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						Annual assessment of goodwill for impairment
Description of the Matter						As disclosed in Note 8, the Company had goodwill of $12,946 million at September 30, 2026. As discussed in Note 1 to the consolidated financial statements, goodwill is tested for impairment annually as of the first day of the fourth fiscal quarter, or more frequently, if an event occurs or circumstances change that would more likely than not reduce fair value below carrying value. The Company’s goodwill is initially assigned to its reporting units as of the acquisition date. The Company first assesses qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If the Company determines the qualitative assessment is not sufficient to conclude on whether it is more likely than not that the fair value is less than the carrying value, a quantitative impairment test is performed. The Company may also elect to bypass the qualitative assessment and perform a quantitative test for any or all reporting units. As part of the quantitative assessment, the Company determines the fair value of the reporting units using a discounted cash flow valuation model. Auditing management’s quantitative impairment assessment was complex and judgmental for certain of the reporting units due to the significant estimation required to determine fair value. In particular, the fair value estimates were sensitive to significant assumptions, such as changes in the discount rate, revenue growth rates and EBITDA margins, which are affected by expectations about future market or economic conditions.
How We Addressed the Matter in Our Audit						We obtained an understanding, evaluated the design and tested the operating effectiveness of controls over the Company’s impairment process, including controls over management’s review of the valuation model and the significant assumptions underlying the fair value determination, as described above. To test the fair values of the Company’s reporting units, our audit procedures included, among others, assessing the use of the discounted cash flow valuation model and testing the significant assumptions discussed above and underlying data used by the Company in its analyses for certain of the reporting units evaluated using the quantitative assessment. We utilized internal valuation specialists in assessing the fair value methodologies applied and evaluating the reasonableness of the discount rate selected by management in the determination of the fair values of certain of the reporting units. We compared the revenue growth rates and EBITDA margins used by management to current industry trends, recent historical performance, or other relevant factors. We performed sensitivity analyses of significant assumptions described above to evaluate the changes in fair values that would result from changes in the assumptions.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2004.

Cleveland, Ohio

November 10, 2026

F-2

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TRANSDIGM GROUP INCORPORATED

CONSOLIDATED BALANCE SHEETS

AS OF SEPTEMBER 30, 2026 AND 2025

(Amounts in millions, except share amounts)


	2026		2025
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	2,279	$	2,808
Trade accounts receivable—Net	2,054		1,617
Inventories—Net	2,713		2,095
Prepaid expenses and other	606		492
Total current assets	7,652		7,012
PROPERTY, PLANT AND EQUIPMENT—NET	1,832		1,579
GOODWILL	12,946		10,612
OTHER INTANGIBLE ASSETS—NET	5,152		3,454
OTHER NON-CURRENT ASSETS	432		252
TOTAL ASSETS	$	28,014	$	22,909

LIABILITIES, REDEEMABLE NCI AND STOCKHOLDERS’ DEFICIT
CURRENT LIABILITIES:
Current portion of long-term debt	$	147	$	124
Short-term borrowings—trade receivable securitization facility	873		724
Accounts payable	518		368
Accrued and other current liabilities	1,100		966
Total current liabilities	2,638		2,182
LONG-TERM DEBT	33,743		29,167
DEFERRED INCOME TAXES	1,023		759
OTHER NON-CURRENT LIABILITIES	517		480
Total liabilities	37,921		32,588

REDEEMABLE NONCONTROLLING INTERESTS (“NCI”)	85		—

TD GROUP STOCKHOLDERS’ DEFICIT:
Common stock - $.01 par value; authorized 224,400,000 shares; issued 62,984,285 and 62,465,317 at September 30, 2026 and September 30, 2025, respectively	1		1
Additional paid-in capital	3,471		3,135
Accumulated deficit	(8,529)		(10,606)
Accumulated other comprehensive income (loss)	34		(10)
Treasury stock, at cost; 8,406,114 and 6,089,675 shares at September 30, 2026 and September 30, 2025, respectively	(4,977)		(2,206)
Total TD Group stockholders’ deficit	(10,000)		(9,686)
NONCONTROLLING INTERESTS	8		7
Total stockholders’ deficit	(9,992)		(9,679)
TOTAL LIABILITIES, REDEEMABLE NCI AND STOCKHOLDERS’ DEFICIT	$	28,014	$	22,909

See notes to consolidated financial statements

F-3

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TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF INCOME

(Amounts in millions, except per share amounts)


	Fiscal Years Ended September 30,
	2026		2025		2024
NET SALES	$	10,557	$	8,831	$	7,940
COST OF SALES	4,303		3,520		3,268
GROSS PROFIT	6,254		5,311		4,672
SELLING AND ADMINISTRATIVE EXPENSES	1,191		945		980
AMORTIZATION OF INTANGIBLE ASSETS	252		201		161
INCOME FROM OPERATIONS	4,811		4,165		3,531
INTEREST EXPENSE—NET	2,008		1,572		1,286
REFINANCING COSTS	28		11		58
OTHER EXPENSE (INCOME)	11		(47)		(28)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	2,764		2,629		2,215
INCOME TAX PROVISION	656		555		500
NET INCOME	2,108		2,074		1,715
LESS: NET INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	(1)		—		(1)
NET INCOME ATTRIBUTABLE TO TD GROUP	$	2,107	$	2,074	$	1,714
NET INCOME APPLICABLE TO TD GROUP COMMON STOCKHOLDERS	$	2,048	$	1,866	$	1,481
Earnings per share attributable to TD Group common stockholders:
Earnings per share	$	35.51	$	32.08	$	25.62
Cash dividends declared per common share	$	—	$	90.00	$	110.00
Weighted-average shares outstanding:
Basic and diluted	57.6		58.2		57.8

See notes to consolidated financial statements

F-4

Table of Contents

TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Amounts in millions)


	Fiscal Years Ended September 30,
	2026		2025		2024
Net income	$	2,108	$	2,074	$	1,715
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(66)		58		181
Unrealized gains (losses) on derivatives	101		(23)		(124)
Pension and post-retirement benefit plans adjustment	9		(3)		(1)
Other comprehensive income, net of tax	44		32		56
Total comprehensive income	2,152		2,106		1,771
Comprehensive income attributable to noncontrolling interests	(1)		—		(1)
Comprehensive income attributable to TD Group	$	2,151	$	2,106	$	1,770

See notes to consolidated financial statements

F-5

Table of Contents

TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ DEFICIT

(Amounts in millions, except share amounts)


			TD Group Stockholders’ Deficit
	Redeemable Noncontrolling Interests		Common Stock			Additional Paid-In Capital		Accumulated Deficit		Accumulated Other Comprehensive (Loss) Income		Treasury Stock					Total Stockholders’ Deficit
			Number of Shares	Par Value								Number of Shares	Value		Noncontrolling Interests
BALANCE—September 30, 2023	$	—	60,995,513	$	1	$	2,440	$	(2,621)	$	(98)	(5,688,639)	$	(1,706)	$	6	$	(1,978)
Changes in noncontrolling interests of consolidated subsidiaries, net	—		—	—		—		—		—		—	—		1		1
Special dividends ($35.00 and $75.00 per share) and vested dividend equivalents declared	—		—	—		—		(6,368)		—		—	—		—		(6,368)
Accrued unvested dividend equivalents and other	—		—	—		—		(87)		—		—	—		—		(87)
Compensation expense recognized for employee stock options	—		—	—		134		—		—		—	—		—		134
Stock-based compensation activity	—		909,320	—		245		—		—		—	—		—		245
Net income attributable to TD Group	—		—	—		—		1,714		—		—	—		—		1,714
Foreign currency translation adjustment, net of tax	—		—	—		—		—		181		—	—		—		181
Unrealized loss on derivatives, net of tax	—		—	—		—		—		(124)		—	—		—		(124)
Pension and post-retirement benefit plans adjustment, net of tax	—		—	—		—		—		(1)		—	—		—		(1)
BALANCE—September 30, 2024	$	—	61,904,833	$	1	$	2,819	$	(7,362)	$	(42)	(5,688,639)	$	(1,706)	$	7	$	(6,283)

Special dividends ($90.00 per share) and vested dividend equivalents declared	—		—	—		—		(5,232)		—		—	—		—		(5,232)
Accrued unvested dividend equivalents and other	—		—	—		—		(86)		—		—	—		—		(86)
Compensation expense recognized for employee stock options	—		—	—		150		—		—		—	—		—		150
Stock-based compensation activity	—		560,484	—		166		—		—		—	—		—		166
Stock repurchases under repurchase program	—		—	—		—		—		—		(401,036)	(500)		—		(500)
Excise tax on stock repurchases	—		—	—		—		—		—		—	—		—		—
Net income attributable to TD Group	—		—	—		—		2,074		—		—	—		—		2,074
Foreign currency translation adjustment, net of tax	—		—	—		—		—		58		—	—		—		58
Unrealized loss on derivatives, net of tax	—		—	—		—		—		(23)		—	—		—		(23)
Pension and post-retirement benefit plans adjustment, net of tax	—		—	—		—		—		(3)		—	—		—		(3)
BALANCE—September 30, 2025	$	—	62,465,317	$	1	$	3,135	$	(10,606)	$	(10)	(6,089,675)	$	(2,206)	$	7	$	(9,679)
Noncontrolling interests recognized related to acquisitions	90		—	—		—		—		—		—	—		—		—
Changes in noncontrolling interests of consolidated subsidiaries, net	1		—	—		—		—		—		—	—		1		1

Acquisitions of noncontrolling interests	(6)		—	—		—		—		—		—	—		—		—

Accrued unvested dividend equivalents and other	—		—	—		—		(30)		—		—	—		—		(30)
Compensation expense recognized for employee stock options	—		—	—		170		—		—		—	—		—		170
Stock-based compensation activity	—		518,968	—		166		—		—		—	—		—		166
Stock repurchases under repurchase program	—		—	—		—		—		—		(2,316,439)	(2,750)		—		(2,750)
Excise tax on stock repurchases	—		—	—		—		—		—		—	(21)		—		(21)
Net income attributable to TD Group	—		—	—		—		2,107		—		—	—		—		2,107
Foreign currency translation adjustment, net of tax	—		—	—		—		—		(66)		—	—		—		(66)
Unrealized gain on derivatives, net of tax	—		—	—		—		—		101		—	—		—		101
Pension and post-retirement benefit plans adjustment, net of tax	—		—	—		—		—		9		—	—		—		9
BALANCE—September 30, 2026	$	85	62,984,285	$	1	$	3,471	$	(8,529)	$	34	(8,406,114)	$	(4,977)	$	8	$	(9,992)

See notes to consolidated financial statements

F-6

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TRANSDIGM GROUP INCORPORATED

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Amounts in millions)


	Fiscal Years Ended September 30,
	2026		2025		2024
OPERATING ACTIVITIES:
Net income	$	2,108	$	2,074	$	1,715
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	191		163		149
Amortization of intangible assets and product certification costs	254		204		163
Amortization of debt issuance costs, original issue discount and premium	47		38		40


Refinancing costs	28		11		58
Gain on sale of businesses, net	—		(10)		(11)
Non-cash stock and deferred compensation expense	158		157		217
Deferred income taxes	48		(10)		10



Changes in assets/liabilities, net of effects from acquisitions and sales of businesses:
Trade accounts receivable	(258)		(212)		(84)
Inventories	(272)		(146)		(83)
Income taxes receivable	(5)		(94)		(62)
Other assets	(115)		(55)		(60)
Accounts payable	73		38		(11)
Accrued interest	10		23		60
Accrued and other liabilities	(80)		(143)		(56)
Net cash provided by operating activities	2,187		2,038		2,045
INVESTING ACTIVITIES:
Capital expenditures	(274)		(222)		(165)
Acquisition of businesses, net of cash acquired	(4,389)		(419)		(2,347)
Other investing transactions, net	1		46		71
Net cash used in investing activities	(4,662)		(595)		(2,441)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options	155		166		245
Dividends and dividend equivalent payments	(59)		(9,629)		(2,038)
Repurchases of common stock	(2,750)		(500)		—
Proceeds from issuance of senior secured notes, net	2,978		494		7,373
Repayments of senior secured notes	(1,846)		—		(4,400)
Proceeds from issuance of senior subordinated notes, net	1,686		4,598		—
Repayments of senior subordinated notes, net	—		(2,650)		(550)
Proceeds from trade receivable securitization facility, net	150		238		137
Proceeds from term loans, net	1,781		6,015		6,815
Repayment on term loans	(121)		(3,622)		(4,403)
Financing costs and other, net	(20)		(10)		(8)
Net cash provided by (used in) financing activities	1,954		(4,900)		3,171
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(8)		4		14
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(529)		(3,453)		2,789
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	2,808		6,261		3,472
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	2,279	$	2,808	$	6,261
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the period for interest, net	$	1,922	$	1,481	$	1,158
Cash paid during the period for income taxes, net of refunds	$	599	$	640	$	539

See notes to consolidated financial statements

F-7

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TRANSDIGM GROUP INCORPORATED

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

FISCAL YEARS ENDED SEPTEMBER 30, 2026, 2025 AND 2024

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

General Information

TransDigm Group Incorporated (“TD Group”), through its wholly-owned subsidiary, TransDigm Inc., is a leading global designer, producer and supplier of highly engineered aircraft components that are critical to the safe and effective operation of nearly all commercial and military aircraft worldwide. Our products are represented in nearly every commercial and military aircraft in service today. TransDigm Inc., along with TransDigm Inc.’s direct and indirect wholly-owned operating subsidiaries (collectively, with TD Group, the “Company” or “TransDigm”), offers a broad range of proprietary aerospace products. TD Group has no significant assets or operations other than its 100% ownership of TransDigm Inc. TD Group’s common stock is listed on the New York Stock Exchange, or the NYSE, under the trading symbol “TDG.”

As used in this Annual Report on Form 10-K, unless the context otherwise requires, the terms “Company”, “TD Group”, “TransDigm”, “we,” “our” or “us” refer to TransDigm Group Incorporated and its subsidiaries.

Basis of Presentation and Principles of Consolidation

The accompanying consolidated financial statements were prepared in conformity with generally accepted accounting principles in the United States (“U.S. GAAP”) and include the accounts of TD Group and subsidiaries. Intercompany balances and transactions have been eliminated. Certain reclassifications to the consolidated financial statements and notes have been made to the prior year amounts to conform to the current year presentation, none of which are material.

Estimates – The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Shipping and Handling Costs – Shipping and handling costs are included in cost of sales in the consolidated statements of income.

Research and Development Costs – The Company expenses research and development costs as incurred and classifies such amounts in selling and administrative expenses. The expense recognized for research and development costs for the fiscal years ended September 30, 2026, 2025 and 2024 was approximately $151 million, $118 million, and $107 million, respectively.

Cash Equivalents – The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. Cash equivalents are recorded at cost, which approximates fair value.

Allowance for Credit Losses – The Company's allowance for credit losses is the allowance for uncollectible accounts. The allowance for uncollectible accounts reduces the trade accounts receivable balance to the estimated net realizable value equal to the amount that is expected to be collected. The Company’s method for developing its allowance for credit losses is based on historical write-off experience, the aging of receivables, an assessment of the creditworthiness of customers, economic conditions and other external market information. The allowance also incorporates a provision for the estimated impact of disputes with customers. All provisions for allowances for uncollectible accounts are included in selling and administrative expenses. The determination of the amount of the allowance for uncollectible accounts is subject to judgment and estimation by management and is also assessed individually at each operating unit by the operating unit’s management team. If circumstances change or economic conditions deteriorate or improve, the allowance for uncollectible accounts could increase or decrease. Refer to Note 5, “Trade Accounts Receivable,” for further information.

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Inventories – Inventories are stated at the lower of cost or net realizable value. Cost of inventories is generally determined by the average actual cost and the first-in, first-out (“FIFO”) methods and includes material, labor and overhead related to the manufacturing process. Provision for potentially obsolete or slow-moving inventory is made based on management’s analysis of inventory levels, historical usage and future sales forecasts. The provision for potentially obsolete or slow-moving inventory at September 30, 2026 and 2025 was $357 million and $270 million, respectively. Refer to Note 6, “Inventories,” for further information.

Property, Plant and Equipment – Property, plant and equipment are stated at cost and include improvements which significantly increase capacities or extend the useful lives of existing plant and equipment. Depreciation is computed using the straight-line method over the following general estimated useful lives: land improvements from 10 to 20 years, buildings and improvements from 5 to 30 years, machinery and equipment from 2 to 10 years and furniture and fixtures from 3 to 10 years. Certain exceptions do apply in which an asset will have an estimated useful life outside of the range listed above dependent on, among other things, the nature and condition of the asset. Net gains or losses related to asset dispositions are recognized in earnings in the period in which dispositions occur. Routine maintenance, repairs and replacements are expensed as incurred. Amortization expense of assets accounted for as finance leases is included within depreciation expense.

Property, plant and equipment is assessed for potential impairment whenever indicators of impairment are present by determining whether the carrying value of the property can be recovered through projected, undiscounted cash flows from future operations over the property’s remaining estimated useful life. Any impairment recognized is the amount by which the carrying amount exceeds the fair value of the asset. Fair value is measured based on quoted market prices in active markets, if available. If quoted market prices are not available, the estimate of fair value is based on various valuation techniques, including the discounted value of estimated future cash flows. No impairments of long-lived assets were recorded in fiscal 2026, 2025 or 2024. Refer to Note 7, “Property, Plant and Equipment,” for further information.

Financial Instruments – Interest rate swap and collar agreements are used to manage interest rate risk associated with floating rate borrowings under our Second Amended and Restated Credit Agreement dated as of June 4, 2014 (the “Credit Agreement”). Under the swap agreements, the Company receives floating rate payments in exchange for making fixed rate payments over the term of the agreements, without an exchange of the underlying principal amount. The collar agreements establish a floor and a cap on Term SOFR for a portion of the Company’s floating rate debt. Together, these agreements reduce the impact of interest rate movements on future interest expense. The interest rate swap and collar agreements are designated and qualify as cash flow hedges.

The Company transacts business in various foreign currencies, which subjects the Company’s cash flows and results of operations to exposure related to changes in foreign currency exchange rates. These exposures arise primarily from purchases or sales of products and services from third parties. Foreign currency forward exchange contracts provide for the purchase or sale of foreign currencies at specified future dates at specified exchange rates, and are used to offset changes in the fair value of certain assets or liabilities or forecasted cash flows resulting from transactions denominated in foreign currencies.

For derivatives designated as cash flow hedges, the entire change in fair value is recorded in accumulated other comprehensive income (loss) in stockholders’ deficit and is reclassified into earnings, in the same line as the hedged item, in the period during which the hedged item affects earnings. Gains and losses on the interest rate swap and collar agreements reclassified into earnings are recognized in interest expense-net. Gains and losses on the foreign currency forward contracts reclassified into earnings are recognized in net sales. Cash flows from settled contracts are included in net cash provided by operating activities. Refer to Note 18, “Derivatives and Hedging Activities,” for further information.

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Business Combinations – In accordance with ASC 805, “Business Combinations,” the Company uses the acquisition method of accounting to allocate costs of acquired businesses to the assets acquired and liabilities assumed based on their estimated fair values at the dates of acquisition. The excess costs of acquired businesses over the fair values of the assets acquired and liabilities assumed were recognized as goodwill. Intangible assets other than goodwill are recognized if the benefit of the intangible asset is obtained through contractual or other legal rights, or if the intangible asset can be sold, transferred, licensed or exchanged, regardless of the Company’s intent to do so. Other intangible assets consist of identifiable intangibles acquired or recognized in accounting for the acquisitions (trademarks, trade names, technology, customer relationships, order backlog and other intangible assets). The valuations of the acquired assets and liabilities will impact the determination of future operating results. Management determines fair value using a discounted future cash flow analysis or other accepted valuation techniques. Determining the fair value of assets acquired and liabilities assumed requires management’s judgment and often involves the use of estimates and assumptions which may be significant, including assumptions with respect to future cash inflows and outflows, revenue growth rates and earnings before interest, taxes, depreciation and amortization (“EBITDA”) margins, discount rates, customer attrition rates, royalty rates, asset lives and market multiples, among other items. These assumptions are forward looking and could be affected by future economic and market conditions. We determine the fair values of intangible assets acquired generally in consultation with third-party valuation advisors. Fair value adjustments to the Company’s assets and liabilities are recognized and the results of operations of the acquired business are included in our consolidated financial statements from the effective date of the merger or acquisition.

Acquisition transaction-related expenses for the fiscal years ended September 30, 2026, 2025 and 2024 totaled approximately $25 million, $6 million and $33 million, respectively. These costs are expensed when incurred and included in selling and administrative expenses in the consolidated statements of income.

Goodwill and Other Intangible Assets – The Company performs an annual impairment test for goodwill and other intangible assets as of the first day of the fourth fiscal quarter of each year, or more frequently, if an event occurs or circumstances change that would more likely than not reduce fair value below carrying value.

We may elect to perform a qualitative assessment that considers economic, industry and company-specific factors for all or selected reporting units. If, after completing this assessment, it is determined that it is more-likely-than-not that the fair value of a reporting unit is less than its carrying value, we proceed to a quantitative test. We may also elect to perform a quantitative test instead of a qualitative assessment for any or all of our reporting units. In this application, the definition of “more-likely-than-not” is interpreted as a likelihood of more than 50%. For the quantitative test, management determines the estimated fair value through the use of a discounted cash flow valuation model incorporating discount rates commensurate with the risks involved for each reporting unit. If the estimated fair value of the reporting unit is less than the current carrying value, impairment of goodwill of the reporting unit is recognized. The assumptions used in the discounted cash flow valuation model for impairment testing include discount rates, revenue growth rates and EBITDA margins, cash flow projections and terminal value rates. Discount rates are set by using the weighted average cost of capital (“WACC”) methodology.

U.S. GAAP requires that the annual, and any interim, impairment assessment be performed at the reporting unit level. Our reporting units have been identified at the operating unit level, which is one level below our operating segments. Substantially all goodwill was determined and recognized for each reporting unit pursuant to the accounting for the merger or acquisition as of the date of each transaction. With respect to acquisitions integrated into an existing reporting unit, any acquired goodwill is combined with the goodwill of the reporting unit.

The impairment test for indefinite-lived intangible assets consists of a comparison between their fair values and carrying values. If the carrying amounts of intangible assets that have indefinite useful lives exceed their fair values, an impairment loss will be recognized in an amount equal to the sum of any such excesses.

The Company assesses the recoverability of its amortizable intangible assets only when indicators of impairment are present by determining whether the carrying value can be recovered through projected, undiscounted cash flows from future operations over their remaining lives. Amortization of amortizable intangible assets is computed using the straight-line method over the following general estimated useful lives: technology & other from 10 to 22 years, order backlog from 1 to 3 years, customer relationships from 10 to 20 years, and other intangible assets over 20 years. No indicators of impairment on the amortizable intangible assets were identified in fiscal 2026, 2025 or 2024.

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Stock-Based Compensation – The Company records stock-based compensation expense using the Black-Scholes pricing model based on certain valuation assumptions. Compensation expense is recorded over the vesting periods of the stock options, adjusted for expected forfeitures. The Company has classified stock-based compensation primarily within selling and administrative expenses to correspond with the classification of employees that receive stock option grants. The Company also evaluates any subsequent changes to any option holders’ terms under the modification rules of ASC 718. If determined to be a modification, the Black-Scholes pricing model is updated as of the date of the modification resulting in a cumulative catch up to expense, if necessary. Refer to Note 16, “Stock-Based Compensation,” for further information.

Income Taxes – The provision for income taxes is calculated using the asset and liability method. Under the asset and liability method, deferred income taxes are recognized for the tax effect of temporary differences between the financial statement carrying amount of assets and liabilities and the amounts used for income tax purposes and for certain changes in valuation allowances. Valuation allowances are recorded to reduce certain deferred tax assets when, in our estimation, it is more likely than not that a tax benefit will not be realized. We recognize uncertain tax positions when we have determined it is more likely than not that a tax position will not be sustained upon examination. However, new information may become available, or applicable laws or regulations may change, thereby resulting in a favorable or unfavorable adjustment to amounts recorded. Taxes related to Global Intangible Low-Taxed Income (“GILTI”) are treated as a current period expense when incurred. Refer to Note 12, “Income Taxes,” for further information.

Comprehensive Income (Loss) – The term “comprehensive income (loss)” represents the change in stockholders’ equity (deficit) from transactions and other events and circumstances resulting from non-stockholder sources. The Company’s accumulated other comprehensive income or loss, consisting principally of fair value adjustments to its interest rate swap and collar agreements (net of tax), cumulative foreign currency translation adjustments and pension liability adjustments (net of tax), is reported separately in the accompanying consolidated statements of comprehensive income.

Foreign Currency Translation and Transactions – The assets and liabilities of subsidiaries located outside the United States are translated into U.S. dollars at the rates of exchange in effect at the balance sheet dates. Revenue and expense items are translated at the average monthly exchange rates prevailing during the period. Gains and losses resulting from foreign currency transactions are recognized currently in income and those resulting from translation of financial statements, including gains and losses from certain intercompany transactions, are accumulated as a separate component of other comprehensive income (loss) for the period. Foreign currency losses or (gains) recognized in cost of sales on the consolidated statements of income from changes in exchange rates were $2 million, $10 million and $20 million for the fiscal years ended September 30, 2026, 2025 and 2024, respectively.

Earnings per Share – Earnings per share is calculated using the two-class method, which includes the weighted-average number of common shares outstanding during the period and other securities that participate in cash dividends (“participating securities”). The Company’s vested stock options are considered “participating securities” because they include non-forfeitable rights to cash dividends. Unvested stock options are not participating securities because their dividend equivalent rights are forfeitable. Under the two-class method, net income attributable to the Company is allocated to both common shares and participating securities based on their respective weighted-average shares outstanding for the period. Diluted earnings per share includes the effect of other potentially dilutive securities, calculated using the treasury stock method, and reflects the more dilutive of the treasury stock and two-class methods. Contingently issuable shares are included in basic earnings per share when all necessary conditions have been satisfied, and in diluted earnings per share if the conditions would have been satisfied had the end of the reporting period been the end of the contingency period. Antidilutive securities are excluded from the calculation. Refer to Note 4, “Earnings Per Share,” for further information.

Redeemable Noncontrolling Interests – As detailed in Note 20, “Redeemable Noncontrolling Interests,” the noncontrolling interest holders of certain subsidiaries hold put options that allow them to sell up to 100% of their remaining interest to the Company. The Company holds call options that allow it to acquire up to 100% of their remaining interest. The cash consideration to be paid for the equity interests (redemption value) is primarily based on a formula using certain adjusted EBITDA metrics and a specified multiple.

Redeemable noncontrolling interests are initially recorded at their acquisition-date fair value. The fair value of the redeemable noncontrolling interests is determined using a Monte Carlo simulation and includes the put and call options available under the purchase agreement. Because redemption is outside the Company’s control, they are presented as temporary equity, between liabilities and stockholders’ deficit, on the consolidated balance sheets. After initial measurement, redeemable noncontrolling interests that are currently redeemable or probable of becoming redeemable are carried at the greater of (i) the redemption value or (ii) the carrying amount, which is the initial amount adjusted for the noncontrolling interest holders’ share of subsidiary earnings reduced by dividends paid to them.

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New Accounting Pronouncements Adopted

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires a public business entity to disclose specific categories in its annual effective tax rate reconciliation and disaggregated information about significant reconciling items by jurisdiction and by nature. The ASU also requires entities to disclose their income tax payments (net of refunds) to international, federal, and state and local jurisdictions. The standard makes several other changes to income tax disclosure requirements. This standard is effective for annual periods beginning after December 15, 2024 (fiscal 2026), and requires prospective application with the option to apply it retrospectively. The Company adopted this standard in the fourth quarter of fiscal 2026 and applied it prospectively. Refer to Note 12, “Income Taxes,” for the required disclosures.

Recent Accounting Pronouncements Issued

In November 2024, the FASB issued ASU 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” Additionally, in January 2025, the FASB issued ASU 2025-01 to clarify the effective date of ASU 2024-03. The standard requires, among other items, additional disaggregated disclosures in the notes to financial statements for certain categories of expenses that are included on the face of the statement of income. The standard is effective for fiscal years beginning after December 15, 2026 (fiscal 2028), and for interim periods within fiscal years beginning after December 15, 2027 (fiscal 2029), on a retrospective or prospective basis, with early adoption permitted. The Company is currently evaluating this standard to determine its impact on our disclosures.

In November 2025, the FASB issued ASU 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements.” ASU 2025-09 provides amendments intended to better align hedge accounting and financial reporting with an entity’s risk management strategies, including expanded eligibility of forecasted transactions, additional flexibility in measuring hedge effectiveness and clarifications related to hedging non-financial items. The standard is effective for fiscal years beginning after December 15, 2026 and interim periods within those fiscal years (fiscal 2028), with early adoption permitted. The Company is currently evaluating this standard to determine its impact on our consolidated financial statements and disclosures.

In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements.” ASU 2025-11 provides clarifications intended to improve the consistency and usability of interim disclosure requirements and the applicability to Topic 270. ASU 2025-11 also provides additional guidance for reporting material events occurring after the most recent annual period. The standard is effective for interim periods within annual periods beginning after December 15, 2027 (fiscal 2029) on a prospective basis, with early adoption permitted. The Company is currently evaluating this standard to determine its impact on our disclosures.

2. ACQUISITIONS

Prince & Izant – On September 28, 2026, the Company completed the acquisition of 99% of the outstanding stock of Prince & Izant (“P&I”) for approximately $1,058 million in cash, net of cash acquired. The definitive agreement to acquire P&I was entered into on July 27, 2026. The acquisition was financed using cash on hand. The remaining 1% of P&I equity interests continue to be owned by a member of P&I’s management team. Refer to Note 20, “Redeemable Noncontrolling Interests,” for further information.

P&I, headquartered in Cleveland, Ohio, is a leading global designer and manufacturer of highly engineered brazing alloys and specialty metal components used across a range of advanced performance and high cost-of-failure applications. P&I primarily supports the aerospace and defense, aeroderivative turbine, and transportation end markets. Within aerospace and defense, select applications include aircraft engine fuel nozzles and rocket engines. Additionally, but to a lesser degree, P&I also serves the medical and general industrial end markets. P&I derives the majority of its revenue from the aftermarket and supports a large installed base globally. P&I’s products are highly proprietary in nature and support end customers through advanced metallurgy, precise chemistry requirements, and deep formulation expertise which are critical to supporting the evolving performance requirements in the markets which it serves. P&I has manufacturing locations in Cleveland, Ohio; Tinley Park, Illinois; Franksville, Wisconsin; and Bay Shore, New York.

The operating results of P&I are included within TransDigm’s Power & Control segment.

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The Company accounted for the P&I acquisition using the acquisition method of accounting and included the results of operations of the acquisition in its consolidated financial statements from the acquisition date. The purchase price was allocated to the assets acquired, liabilities assumed and redeemable noncontrolling interests recognized based on their estimated fair values at the acquisition date. The excess of the purchase price and the fair value of the redeemable noncontrolling interests over the fair value of the net identifiable assets acquired was recorded as goodwill. The allocation is preliminary. As of September 30, 2026, the measurement period (not to exceed one year from the acquisition date) is open. The Company is in the process of obtaining a third-party valuation of the other intangible assets and the redeemable noncontrolling interests and of finalizing working capital and income taxes. The amounts recognized are subject to adjustment until the end of the measurement period and the adjustments may be material.

The preliminary allocation resulted in $627 million of goodwill and $410 million of other intangible assets. The other intangible assets consist of $198 million of technology (amortized over 20 years), $135 million of customer relationships (amortized over 20 years), $65 million of trademarks and trade names (indefinite-lived) and $12 million of backlog (amortized over 1 year). Of these amounts, $219 million of goodwill and $170 million of other intangible assets are expected to be deductible for tax purposes over 15 years.

Jet Parts Engineering and Victor Sierra Aviation Holdings – On April 7, 2026, the Company completed the acquisition of 95% of the outstanding stock of Jet Parts Engineering (“JPE”) and 96% of the outstanding stock of Victor Sierra Aviation Holdings (“VSA”) for approximately $2,142 million in cash, net of cash acquired. The definitive agreement to acquire JPE and VSA was entered into on January 13, 2026. The remaining 5% and 4%, respectively, of JPE and VSA equity interests continue to be owned by certain members of JPE’s and VSA’s management teams. Refer to Note 20, “Redeemable Noncontrolling Interests,” for further information. The acquisition was financed using cash on hand and the net proceeds from the debt offerings completed in February 2026 (refer to Note 10, “Debt,” for further information).

JPE, headquartered in Seattle, Washington, is a leading independent designer and manufacturer of aerospace aftermarket solutions, primarily proprietary original equipment manufacturer (“OEM”) alternative parts and repairs. JPE serves commercial, regional and cargo airline customers, as well as maintenance, repair and overhaul providers. JPE’s products are highly engineered, proprietary parts manufacturer approval (“PMA”) components with a strong presence across major commercial aerospace platforms. VSA is a leading designer, manufacturer, and distributor of proprietary PMA and other aftermarket parts serving the commercial aerospace end market – primarily the general aviation and business aviation sectors. VSA is a leading collection of brands including McFarlane Aviation, Tempest Aero Group, and Aviation Products Systems. VSA offers a complete line of highly engineered PMA, custom design and OEM products, as well as service and repair stations. Nearly all of JPE’s and VSA’s sales are derived from the commercial aftermarket.

The operating results of JPE and VSA are included within TransDigm’s Power & Control segment.

The Company accounted for the JPE and VSA acquisition using the acquisition method of accounting and included the results of operations of the acquisition in its consolidated financial statements from the effective date of the acquisition. The total purchase price was allocated to the underlying assets acquired, liabilities assumed and redeemable noncontrolling interests recognized based upon their estimated fair values at the date of acquisition. The excess of the purchase price and the fair value of the redeemable noncontrolling interests over the fair value of the net identifiable assets acquired was recorded as goodwill. The Company has completed the valuation of the identifiable intangible assets and redeemable noncontrolling interests, which was performed with the assistance of a third-party valuation specialist. The allocation remains preliminary and is subject to adjustment during the measurement period, which will not exceed one year from the acquisition date, as the Company finalizes income taxes and certain other assets and liabilities. The Company does not expect material changes to the allocation.

During the fourth quarter of fiscal 2026, the Company recorded measurement period adjustments, primarily as a result of the completion of the third-party valuation and related impact on deferred tax liabilities, that increased goodwill by a net amount of $47 million. The adjustment to goodwill was a result of an increase to deferred income tax liabilities of $90 million, partially offset by an increase to other intangible assets of $43 million. The related effect on amortization expense was not material. The remaining measurement period adjustments recorded were not material.

The allocation resulted in $1,183 million of goodwill and $996 million of other intangible assets. The other intangible assets consist of $625 million of customer relationships (amortized over 20 years), $280 million of technology (amortized over 20 years) and $91 million of trademarks and trade names (indefinite-lived). Of these amounts, $753 million of goodwill and $707 million of other intangible assets are expected to be deductible for tax purposes over 15 years.

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Simmonds Precision Products, Inc. – On October 6, 2025, the Company completed the acquisition of all the outstanding stock of the Simmonds Precision Products, Inc. business (“Simmonds”) of Goodrich Corporation for approximately $757 million in cash, net of cash acquired. The acquisition was financed using cash on hand. Simmonds, headquartered in Vergennes, Vermont, is a leading global designer and manufacturer of fuel & proximity sensing and structural health monitoring solutions for the aerospace and defense end markets. Simmonds’ products are highly engineered, proprietary components with significant aftermarket content and a strong presence across major aerospace and defense platforms. The operating results of Simmonds are included within TransDigm’s Power & Control segment.

The Company completed its allocation of the fair value of the assets acquired and liabilities assumed for the Simmonds acquisition. The final allocation resulted in $370 million of goodwill and $425 million of other intangible assets. The other intangible assets consist of $219 million of technology (amortized over 20 years), $160 million of customer relationships (amortized over 20 years) and $46 million of trademarks and trade names (indefinite-lived). All of the goodwill and other intangible assets recognized are deductible for tax purposes over 15 years.

Servotronics, Inc. – On June 2, 2025, the Company launched a tender offer to acquire all the issued and outstanding stock of Servotronics, Inc. (“Servotronics”), at a price of $47.00 per share in cash. On July 1, 2025, the tender offer expired, resulting in all issued and outstanding stock of Servotronics being canceled and Servotronics becoming a wholly owned subsidiary of the Company. The total purchase price was approximately $133 million in cash, net of cash acquired. The acquisition was financed through cash on hand. Servotronics, headquartered in Elma, New York, is a leading global designer and manufacturer of servo controls and other advanced technology components for aerospace and defense applications. Its products are highly engineered, proprietary components with significant aftermarket content and a strong presence across major aerospace and defense platforms. The operating results of Servotronics are included within TransDigm’s Power & Control segment.

The Company completed its allocation of the fair value of the assets acquired and liabilities assumed for the Servotronics acquisition. The final allocation resulted in $76 million of goodwill and $46 million of other intangible assets, none of which are deductible for tax purposes.

Other Acquisitions – For the fiscal year ended September 30, 2026, the Company completed several acquisitions consisting of substantially all of the assets and technical data rights of certain product lines or all the outstanding stock of certain businesses (collectively, referred to herein as the “Other Acquisitions”), each meeting the definition of a business, for a total aggregate purchase price of $434 million in cash, net of cash acquired. Each of the acquisitions was financed using cash on hand. These acquisitions represent bolt-ons to existing TransDigm operating units. Of the $176 million of goodwill recognized, $112 million is expected to be deductible for tax purposes over 15 years. Of the $134 million of other intangible assets recognized, $95 million is expected to be deductible for tax purposes over 15 years. As of September 30, 2026, the measurement period (not to exceed one year) is open for the fiscal 2026 Other Acquisitions; therefore, the assets acquired and liabilities assumed are subject to adjustment until the end of the respective measurement period. No adjustments are expected to be material to the consolidated financial statements.

For the fiscal year ended September 30, 2025, the Company completed a number of Other Acquisitions, each meeting the definition of a business, for a total aggregate purchase price of $284 million in cash, net of cash acquired. Each of the acquisitions was financed using cash on hand. These acquisitions represent bolt-ons to existing TransDigm operating units. All of the approximately $147 million of goodwill and $90 million of other intangible assets recognized for the acquisitions are deductible for tax purposes over 15 years.

* * * * *

Pro forma net sales and results of operations for the acquisitions, had they occurred at the beginning of the fiscal years ended September 30, 2026 or September 30, 2025 are not material. Net sales and results of operations for the fiscal 2026 acquisitions included in the consolidated statements of income for the fiscal year ended September 30, 2026 are not material.

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The acquisitions completed by the Company strengthen and expand the Company’s position to design, produce and supply highly engineered proprietary aerospace components in niche markets with significant aftermarket content and provide opportunities to create value through the application of our three core value-driven operating strategy (obtaining profitable new business, continually improving our cost structure, and providing highly engineered value-added products to customers). The purchase prices paid reflect the current earnings and cash flows, as well as the future earnings and cash flows expected to be generated by the businesses, which are driven in most cases by the recurring aftermarket consumption over the life of a particular aircraft, estimated to be approximately 25 to 30 years. The primary items that generate the goodwill recognized are the premiums paid by the Company for the future earnings potential of the businesses acquired and the value of their assembled workforces that do not qualify for separate recognition.

3. REVENUE RECOGNITION

TransDigm's sales are concentrated in the aerospace and defense industry. The Company’s customers include: distributors of aerospace components, commercial airlines, large commercial transport and regional and business aircraft original equipment manufacturers (“OEMs”), various armed forces of the U.S. and friendly foreign governments, defense OEMs, system suppliers, and various other industrial customers.

The Company recognizes revenue from contracts with customers using the five step model prescribed in ASC 606. A substantial portion of the Company’s revenue is recorded at a point-in-time basis. Revenue is recognized from the sale of products or services when obligations under the terms of the contract are satisfied and control of promised goods or services has transferred to the customer. Control is transferred when the customer has the ability to direct the use of and obtain benefits from the goods or services. Revenue is measured at the amount of consideration the Company expects to be paid in exchange for goods or services.

In a limited number of contracts, control transfers to the customer over time, primarily in contracts where the customer is required to pay for the cost of both the finished and unfinished goods at the time of cancellation plus a reasonable profit relative to the work performed for products that were customized for the customer. Therefore, we recognize revenue over time for those agreements that have a right to margin and where the products being produced have no alternative use.

Based on our production cycle, it is generally expected that goods related to the revenue will be shipped and billed within twelve months. For revenue recognized over time, we estimate the amount of revenue attributable to a contract earned at a given point during the production cycle based on certain costs, such as materials and labor incurred to date, plus the expected profit, which is a cost-to-cost input method.

We consider the contractual consideration payable by the customer and assess variable consideration that may affect the total transaction price. Variable consideration is included in the estimated transaction price when there is a basis to reasonably estimate the amount, including whether the estimate should be constrained in order to avoid a significant reversal of revenue in a future period. These estimates are based on historical experience, anticipated performance under the terms of the contract and our best judgment at the time.

When contracts are modified to account for changes in contract specifications and requirements, the Company considers whether the modification either creates new or changes the existing enforceable rights and obligations. Contract modifications that are for goods or services that are not distinct from the existing contract, due to the significant integration with the original good or service provided, are accounted for as if they were part of that existing contract. The effect of a contract modification to an existing contract on the transaction price and our measure of progress for the performance obligation to which it relates, is recognized as an adjustment to revenue on a cumulative catch-up basis. When the modifications include additional performance obligations that are distinct and at relative stand-alone selling price, they are accounted for as a new contract and performance obligation, which are recognized prospectively.

The Company’s payment terms vary by the type and location of the customer and the products or services offered. The Company does not offer any payment terms that would meet the requirements for consideration as a significant financing component.

Shipping and handling fees and costs incurred in connection with products sold are recorded in cost of sales in the consolidated statements of income, and are not considered a performance obligation to our customers.

The Company pays sales commissions that relate to contracts for products or services that are satisfied at a point-in-time or over a period of one year or less and are expensed as incurred. These costs are reported as a component of selling and administrative expenses in the consolidated statements of income.

In fiscal 2026, 2025 and 2024, no customer individually accounted for 10% or more of the Company’s net sales.

Net sales to foreign customers, primarily in Western Europe, Canada and Asia, were $3,698 million, $3,296 million and $2,908 million during the fiscal years ended September 30, 2026, 2025 and 2024, respectively.

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We have elected to adopt the practical expedient to not disclose the aggregate amount of transaction price allocated to performance obligations that are unsatisfied as of the end of the reporting period for performance obligations that are part of a contract with an original expected duration of one year or less.

Contract Assets and Liabilities – Contract assets reflect revenue recognized and performance obligations satisfied in advance of customer billing or reimbursable costs related to a specific contract. Contract liabilities (Deferred revenue) relate to payments received in advance of the satisfaction of performance under the contract. We receive payments from customers based on the terms established in our contracts. The following table summarizes our contract assets and liabilities balances (in millions):


	September 30, 2026		September 30, 2025
Contract assets, current (1)	$	339	$	280
Contract assets, non-current (2)	128		94
Total contract assets	467		374
Contract liabilities, current (3)	161		143
Contract liabilities, non-current (4)	5		7
Total contract liabilities	166		150
Net contract assets	$	301	$	224

(1)Included in prepaid expenses and other on the consolidated balance sheets.

(2)Included in other non-current assets on the consolidated balance sheets.

(3)Included in accrued and other current liabilities on the consolidated balance sheets.

(4)Included in other non-current liabilities on the consolidated balance sheets.

The increase in the Company’s current and non-current contract assets at September 30, 2026 compared to September 30, 2025 is primarily due to the fiscal 2026 acquisitions and also the timing and status of work in process and/or milestones of certain contracts. For the fiscal year ended September 30, 2026, the revenue recognized that was included in the contract liability balance at the beginning of the fiscal year was approximately $115 million.

Refer to Note 15, “Segments,” for disclosures related to the disaggregation of revenue.

4. EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted earnings per share (in millions, except per share data) using the two-class method:


	Fiscal Years Ended September 30,
	2026		2025		2024
Numerator for earnings per share:
Net income	$	2,108	$	2,074	$	1,715
Less: Net income attributable to noncontrolling interests	(1)		—		(1)
Net income attributable to TD Group	2,107		2,074		1,714
Less: Dividends declared or paid on participating securities	(59)		(208)		(233)

Net income applicable to TD Group common stockholders—basic and diluted	$	2,048	$	1,866	$	1,481
Denominator for basic and diluted earnings per share under the two-class method:
Weighted-average common shares outstanding	55.9		56.3		55.8
Vested options deemed participating securities	1.7		1.9		2.0
Total shares for basic and diluted earnings per share	57.6		58.2		57.8



Earnings per share—basic and diluted (1)	$	35.51	$	32.08	$	25.62

(1)Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated using unrounded numbers.

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Basic and diluted earnings per share are the same for all periods presented. Vested stock options are participating securities and are included in the two-class method for both measures. Unvested stock options were not included in diluted earnings per share because the related performance conditions had not been met as of the end of the period. No securities were excluded from the computation of diluted earnings per share because their effect would have been antidilutive.

5. TRADE ACCOUNTS RECEIVABLE

Trade accounts receivable consist of the following (in millions):


	September 30, 2026		September 30, 2025
Trade accounts receivable—gross	$	2,086	$	1,642
Allowance for uncollectible accounts	(32)		(25)
Trade accounts receivable—Net	$	2,054	$	1,617

Allowance for Credit Losses – The Company’s allowance for credit losses is the allowance for uncollectible accounts. The allowance for uncollectible accounts reduces the trade accounts receivable balance to the estimated net realizable value equal to the amount that is expected to be collected. For the fiscal years ended September 30, 2026 and 2025, the activity (including charges to expense, write-offs and recoveries) to the allowance was not material.

6. INVENTORIES

Inventories consist of the following (in millions):


	September 30, 2026		September 30, 2025
Raw materials and purchased component parts	$	1,624	$	1,295
Work-in-progress	746		543
Finished goods	343		257
Inventories—Net	$	2,713	$	2,095

7. PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following (in millions):


	September 30, 2026		September 30, 2025
Land and improvements	$	203	$	192
Buildings and improvements	924		794
Machinery, equipment and other	1,869		1,621
Construction-in-progress	193		163
Total	3,189		2,770
Accumulated depreciation	(1,357)		(1,191)
Property, plant and equipment—Net	$	1,832	$	1,579

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8. GOODWILL AND INTANGIBLE ASSETS

The following is a summary of changes in the carrying value of goodwill by segment for the fiscal years ended September 30, 2025 and 2026 (in millions):


	Power & Control		Airframe		Non-aviation		Total
Balance at September 30, 2024	$	5,034	$	5,306	$	79	$	10,419
Goodwill acquired during the period	189		13		—		202
Purchase price allocation adjustments (1)	18		(56)		—		(38)
Currency translation adjustments and other	32		(3)		—		29
Balance at September 30, 2025	5,273		5,260		79		10,612
Goodwill acquired during the period	2,272		84		—		2,356
Purchase price allocation adjustments (2)	21		—		—		21
Currency translation adjustments and other	(26)		(17)		—		(43)
Balance at September 30, 2026	$	7,540	$	5,327	$	79	$	12,946

(1)Primarily related to the opening balance sheet adjustments recorded for the acquisition of Raptor Scientific (Airframe) completed during the fourth quarter of fiscal 2024 and CPI’s Electron Device Business (Power & Control) completed during the third quarter of fiscal 2024, within the allowable measurement period (not to exceed one year from the acquisition date).

(2)Primarily related to the opening balance sheet adjustments recorded for Servotronics (Power & Control) and certain Other Acquisitions (Power & Control) completed during fiscal 2025, within the allowable measurement period (not to exceed one year from the acquisition date). Measurement period adjustments for acquisitions completed during fiscal 2026 are included in goodwill acquired during the period.

Other intangible assets–net in the consolidated balance sheets consist of the following at September 30 (in millions):


	2026						2025
	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Trademarks and trade names	$	1,371	$	—	$	1,371	$	1,162	$	—	$	1,162
Technology	3,392		1,271		2,121		2,647		1,137		1,510
Order backlog	59		29		30		59		28		31
Customer relationships	1,925		299		1,626		971		225		746
Other	12		8		4		12		7		5
Total	$	6,759	$	1,607	$	5,152	$	4,851	$	1,397	$	3,454

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The purchase price of each acquisition is allocated to the assets acquired and liabilities assumed based on their estimated fair values at the acquisition date. For acquisitions with an open measurement period (not to exceed one year from the acquisition date), the allocations are provisional and subject to adjustment. Refer to Note 2, “Acquisitions,” for further information. Intangible assets acquired during the fiscal year ended September 30, 2026 are summarized in the table below (in millions):


	Gross Amount		Amortization Period
Intangible assets not subject to amortization:
Trademarks and trade names	$	214

Intangible assets subject to amortization:
Technology & Other	766		10 to 20 years
Order backlog	26		1 to 3 years
Customer relationships	959		10 to 20 years
	1,751

Total	$	1,965

Information regarding the amortization expense of amortizable intangible assets is detailed below (in millions):

Annual Amortization Expense:


Fiscal Years Ended September 30,
2026	$	252
2025	201
2024	161

Estimated Amortization Expense:


Fiscal Years Ended September 30,
2027	$	294
2028	271
2029	265
2030	262
2031	253

9. ACCRUED AND OTHER CURRENT LIABILITIES

Accrued and other current liabilities consist of the following (in millions):


	September 30, 2026		September 30, 2025
Compensation and related benefits	$	280	$	235
Interest	218		208
Contract liabilities, current (Note 3)	161		143
Dividend equivalent payments, current (Note 16)	54		59
Product warranties	45		37
Current operating lease liabilities (Note 17)	22		15
Excise tax on share repurchases	21		—
Income taxes payable, current	18		40
Foreign currency forward exchange contracts (Note 18)	1		2
Other	280		227
Accrued and other current liabilities	$	1,100	$	966

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10. DEBT

The Company’s debt consists of the following (in millions):


	September 30, 2026
	Gross Amount		Debt Issuance Costs		Original Issue (Discount) or Premium		Net Amount
Short-term borrowings—trade receivable securitization facility	$	875	$	(2)	$	—	$	873
Term loans	$	12,803	$	(52)	$	(29)	$	12,722
6.750% secured notes due 2028 (“2028 Secured Notes”)	269		(1)		(1)		267
4.625% senior subordinated notes due 2029 (“4.625% 2029 Notes”)	1,200		(3)		—		1,197
6.375% secured notes due 2029 (“2029 Secured Notes”)	2,750		(12)		(1)		2,737
4.875% senior subordinated notes due 2029 (“4.875% 2029 Notes”)	750		(2)		—		748
6.875% secured notes due 2030 (“2030 Secured Notes”)	1,450		(8)		—		1,442
7.125% secured notes due 2031 (“2031 Secured Notes”)	1,000		(6)		(5)		989
6.625% secured notes due 2032 (“2032 Secured Notes”)	2,200		(14)		—		2,186
6.000% secured notes due 2033 (“2033 Secured Notes”)	1,500		(11)		—		1,489
6.375% senior subordinated notes due 2033 (“6.375% 2033 Notes”)	2,650		(12)		(17)		2,621
6.250% secured notes due 2034 (“2034 Secured Notes”)	500		(4)		—		496
6.750% senior subordinated notes due 2034 (“6.750% 2034 Notes”)	2,000		(16)		—		1,984
6.125% senior subordinated notes due 2034 (“6.125% 2034 Notes”)	1,700		(15)		2		1,687
6.750% secured notes due 2035 (“2035 Secured Notes”)	3,000		(27)		—		2,973
Government refundable advances	8		—		—		8
Finance lease obligations	344		—		—		344
	34,124		(183)		(51)		33,890
Less: current portion	148		(1)		—		147
Long-term debt	$	33,976	$	(182)	$	(51)	$	33,743

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	September 30, 2025
	Gross Amount		Debt Issuance Costs		Original Issue Discount		Net Amount
Short-term borrowings—trade receivable securitization facility	$	725	$	(1)	$	—	$	724
Term loans	$	11,124	$	(43)	$	(33)	$	11,048
2028 Secured Notes	2,100		(11)		(6)		2,083
4.625% 2029 Notes	1,200		(5)		—		1,195
2029 Secured Notes	2,750		(17)		(1)		2,732
4.875% 2029 Notes	750		(3)		—		747
2030 Secured Notes	1,450		(10)		—		1,440
2031 Secured Notes	1,000		(8)		(6)		986
2032 Secured Notes	2,200		(17)		—		2,183
2033 Secured Notes	1,500		(12)		—		1,488
6.375% 2033 Notes	2,650		(14)		(20)		2,616
2034 Secured Notes	500		(5)		—		495
6.750% 2034 Notes	2,000		(18)		—		1,982
Government refundable advances	12		—		—		12
Finance lease obligations	284		—		—		284
	29,520		(163)		(66)		29,291
Less: current portion	125		(1)		—		124
Long-term debt	$	29,395	$	(162)	$	(66)	$	29,167

Issuance of the $1,200 Million 6.125% 2034 Notes – On February 13, 2026, the Company entered into a purchase agreement in connection with a private offering of $1,200 million in aggregate principal amount of 6.125% senior subordinated notes due 2034 (the “$1,200 million 6.125% 2034 Notes”) at an issue price of 100% of the principal amount. The $1,200 million 6.125% 2034 Notes were issued pursuant to an indenture, dated as of February 13, 2026, among TransDigm Inc., as issuer, TransDigm Group and the other subsidiaries of TransDigm Inc. named therein, as guarantors. The $1,200 million 6.125% 2034 Notes bear interest at 6.125% per annum, which accrues from February 13, 2026 and is payable in arrears on January 31 and July 31 of each year, commencing on July 31, 2026. The $1,200 million 6.125% 2034 Notes mature on July 31, 2034, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the related indenture.

Issuance of the $500 Million 6.125% 2034 Notes – On April 17, 2026, the Company entered into a purchase agreement in connection with a private offering of an additional $500 million in aggregate principal amount of 6.125% senior subordinated notes due 2034 (the “$500 million 6.125% 2034 Notes”) at an issue price of 100.375%, which resulted in a premium of approximately $2 million. The $500 million 6.125% 2034 Notes were issued pursuant to a supplemental indenture, dated as of April 17, 2026, which is substantially the same as the terms and conditions that apply to the $1,200 million 6.125% 2034 Notes indenture dated as of February 13, 2026 (collectively, the $500 million 6.125% 2034 Notes and the $1,200 million 6.125% 2034 Notes are referred to herein as the “6.125% 2034 Notes”).

The Company capitalized approximately $16 million in debt issuance costs associated with the 6.125% 2034 Notes during the fiscal year ended September 30, 2026.

Amendment No. 20 and Incremental Term Loan Assumption Agreement – On February 13, 2026, the Company entered into Amendment No. 20 and Incremental Term Loan Assumption Agreement (herein, “Amendment No. 20”), pursuant to which the Company, among other things, incurred $800 million in Tranche N term loans (the “Initial Tranche N term loans”). The other terms and conditions that apply to the Initial Tranche N term loans are substantially the same as the terms and conditions that apply to the other term loans existing under the Term Loans Facility. The Initial Tranche N term loans were fully drawn on February 13, 2026.

Amendment No. 21 and Incremental Term Loan Assumption Agreement – On April 17, 2026, the Company entered into Amendment No. 21 and Incremental Term Loan Assumption Agreement (herein, “Amendment No. 21”), pursuant to which the Company, among other things, incurred $1,000 million in additional Tranche N term loans (the “Additional Tranche N term loans”). The other terms and conditions that apply to the Additional Tranche N term loans are substantially the same as the terms and conditions that apply to the other term loans existing under the Term Loans Facility (collectively, the Additional Tranche N term loans and the Initial Tranche N term loans are referred to herein as the “Tranche N term loans”). The Additional Tranche N term loans were fully drawn on April 17, 2026.

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Principal payments for the Tranche N term loans commenced on June 30, 2026, with approximately $4.5 million to be paid on a quarterly basis up to the February 13, 2033 maturity date. The Tranche N term loans bear interest at Term SOFR plus 2.50% per annum, which accrued from February 13, 2026, and is payable in arrears on March 31, June 30, September 30, and December 31 of each year, commencing on June 30, 2026.

The Company capitalized approximately $17 million in debt issuance costs associated with Amendments No. 20 and No. 21 during the fiscal year ended September 30, 2026.

Use of Proceeds

The Company used the net proceeds from the February 13, 2026 issuances of the $1,200 million 6.125% 2034 Notes and the Initial Tranche N term loans, along with cash on hand, to fund the purchase price of the acquisition of JPE and VSA and for related transaction fees and expenses.

The Company intended to use the net proceeds from the April 17, 2026 issuances of the $500 million 6.125% 2034 Notes and the Additional Tranche N term loans, along with cash on hand, to fund the purchase price of the proposed acquisition of Stellant Systems, Inc., common stock repurchases (refer to Note 14, “Stock Repurchase Program”) and for general corporate purposes. Notwithstanding the July 13, 2026 announcement that the Company elected to withdraw from its proposed acquisition of Stellant Systems, Inc., there was no special mandatory redemption of the April 17, 2026 debt issuances and they remain outstanding.

Issuance of the 2035 Secured Notes – On September 28, 2026, the Company entered into a purchase agreement in connection with a private offering of $3,000 million in aggregate principal amount of 6.750% senior secured notes due 2035 at an issue price of 100% of the principal amount. The 2035 Secured Notes were issued pursuant to an indenture, dated as of September 28, 2026, among TransDigm Inc., as issuer, TransDigm Group and the other subsidiaries of TransDigm Inc. named therein, as guarantors. The 2035 Secured Notes bear interest at 6.750% per annum, which accrues from September 28, 2026 and is payable in arrears on January 31 and July 31 of each year, commencing on January 31, 2027. The 2035 Secured Notes mature on January 31, 2035, unless earlier redeemed or repurchased, and are subject to the terms and conditions set forth in the related indenture.

The Company capitalized approximately $27 million in debt issuance costs associated with the 2035 Secured Notes during the fiscal year ended September 30, 2026.

The net proceeds from the 2035 Secured Notes were used to repurchase the tendered 2028 Secured Notes (as further described below) and for general corporate purposes.

Tender Offer for the 2028 Secured Notes – On September 14, 2026, the Company announced a cash tender offer for any and all of its outstanding $2,100 million aggregate principal amount of 6.750% senior secured notes due 2028. On September 29, 2026, the Company purchased approximately $1,831 million aggregate principal amount of the 2028 Secured Notes that had been validly tendered before the early tender deadline of September 25, 2026. Holders received total consideration of $1,008.00 (plus accrued and unpaid interest) per $1,000 principal amount. The total consideration included an early tender premium of $30.00 per $1,000 principal amount. Approximately $269 million aggregate principal amount of the 2028 Secured Notes remained outstanding as of September 30, 2026. Subsequent to September 30, 2026, approximately $2 million aggregate principal amount of the 2028 Secured Notes were validly tendered and repurchased by the Company prior to the expiration of the tender offer on October 13, 2026.

The Company recorded refinancing costs of approximately $26 million, consisting of the $15 million early tender premium paid in excess of par, plus the write-off of the unamortized debt issuance costs and original issue discount of $6 million and $3 million, respectively, and other fees of $2 million during the fiscal year ended September 30, 2026 in conjunction with the purchase of the 2028 Secured Notes.

Trade Receivable Securitization Facility – The Company’s trade receivable securitization facility (the “Securitization Facility”) effectively increases the Company’s borrowing capacity depending on the amount of the domestic operations’ trade accounts receivable. The Securitization Facility includes the right for the Company to exercise annual one year extensions as long as there have been no termination events as defined by the agreement. The Company uses the proceeds from the Securitization Facility as an alternative to other forms of debt, effectively reducing borrowing costs.

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Government Refundable Advances

Government refundable advances consist of payments received from the Canadian government to assist in research and development related to commercial aviation. The requirement to repay this advance is based on year-over-year commercial aviation revenue growth for certain product lines at CMC Electronics, which is a wholly-owned subsidiary of TransDigm. As of September 30, 2026 and 2025, the outstanding balance of these advances was $8 million and $12 million, respectively.

Obligations under Finance Leases

The Company leases certain buildings and equipment under finance leases. The present value of the minimum finance lease payments, inclusive of the current portion, represents a balance of $344 million and $284 million at September 30, 2026 and 2025, respectively. The increase in fiscal 2026 is primarily attributable to leases assumed from business combinations, new leases of facilities and amendments to previous agreements qualifying as lease modifications resulting in a change in classification from an operating lease to a finance lease. Refer to Note 17, “Leases,” for further disclosure of the Company’s lease obligations.

Senior Secured Credit Facilities

As of September 30, 2026, TransDigm has $12,803 million in fully drawn term loans (the “Term Loans Facility”) and a $910 million revolving credit facility, of which $865 million in borrowings was available to the Company under the revolving commitments. As of September 30, 2025, TransDigm had $11,124 million in fully drawn term loans and a $910 million revolving credit facility, of which $857 million was available for borrowing to the Company under the revolving commitments. For both fiscal 2026 and 2025, draws on the revolving commitments are subject to an interest rate of Term SOFR plus 2.25% and the unused portion of the revolving commitments is subject to a fee of 0.50% per annum. The total fees incurred on the unused portion of the revolving commitments were not material in fiscal 2026 or fiscal 2025. TransDigm is in compliance with all the covenants contained in the Credit Agreement.


Term Loans Facility	Maturity Date	Interest Rate under Term Loans Facility	Aggregate Principal as of September 30,
			2026		2025
Tranche J	February 28, 2031	Term SOFR plus 2.50%	$	3,559	$	3,595
Tranche K	March 22, 2030	Term SOFR plus 2.25%	$	3,508	$	3,544
Tranche L	January 19, 2032	Term SOFR plus 2.50%	$	1,470	$	1,485
Tranche M	August 19, 2032	Term SOFR plus 2.50%	$	2,475	$	2,500
Tranche N	February 13, 2033	Term SOFR plus 2.50%	$	1,791	$	—

The interest rates per annum applicable to the Term Loans Facility under the Credit Agreement are, at TransDigm’s option, equal to either an alternate base rate or an adjusted Term SOFR for one-, three- or six-month interest periods chosen by TransDigm, in each case plus an applicable margin percentage. The adjusted Term SOFR related to the Term Loans Facility is not subject to a floor. Refer to Note 18, “Derivatives and Hedging Activities,” for further information about how our interest rate swaps and collar agreements are used to hedge and offset, respectively, the variable interest rate portion of our debt.

Secured Notes

TransDigm Inc. is the issuer of the 2028 Secured Notes, 2029 Secured Notes, 2030 Secured Notes, 2031 Secured Notes, 2032 Secured Notes, 2033 Secured Notes, 2034 Secured Notes and 2035 Secured Notes (collectively, the “Secured Notes”). The Secured Notes are senior secured obligations of TransDigm Inc. and are fully and unconditionally guaranteed on a joint and several, senior secured basis by TransDigm Group and certain of TransDigm Inc.’s subsidiaries, as described under “Guarantor Information” in Item 7 of this Form 10-K and listed in Exhibit 22.1. The Secured Notes contain restrictive covenants that are substantially similar to many of the restrictive covenants in the Credit Agreement. The Company is in compliance with all of the covenants contained in the Secured Notes.

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Subordinated Notes

TransDigm Inc. is the issuer of the 4.625% 2029 Notes, 4.875% 2029 Notes, 6.375% 2033 Notes, 6.750% 2034 Notes and the 6.125% 2034 Notes (collectively, the “Subordinated Notes”). The Subordinated Notes are unsecured obligations of TransDigm Inc., are subordinated in right of payment to its senior indebtedness (including the Secured Notes and the senior secured credit facilities) and are fully and unconditionally guaranteed, on a joint and several, senior subordinated unsecured basis, by TD Group and certain of TransDigm Inc.’s subsidiaries, as described under “Guarantor Information” in Item 7 and listed in Exhibit 22.1. The Subordinated Notes contain restrictive covenants that are substantially similar to many of the restrictive covenants in the Credit Agreement. The Company is in compliance with all of the covenants contained in the Subordinated Notes.

Debt Repayment Schedule

At September 30, 2026, future maturities of long-term debt (excluding finance lease obligations) are as follows (in millions), refer to Note 17, “Leases,” for future maturities of finance leases:


Fiscal Years Ended September 30,
2027	$	136
2028	401
2029	4,830
2030	3,496
2031	4,921
Thereafter	19,996
Total	$	33,780

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11. FAIR VALUE MEASUREMENTS

The Company values its financial instruments using an industry standard market approach, in which prices and other relevant information are generated by market transactions involving identical or comparable assets or liabilities. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs (other than quoted prices) that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. No financial instruments were measured at fair value on a recurring basis, or disclosed at fair value, using unobservable inputs (Level 3). Fair value measurements made at the acquisition date of businesses, which use significant unobservable inputs, are described in Note 2, “Acquisitions.”

The following table presents our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in millions):


	Level	September 30, 2026		September 30, 2025
Assets:

Interest rate swap and collar agreements (1)	2	$	19	$	7

Interest rate swap and collar agreements (2)	2	117		8

Liabilities:

Foreign currency forward exchange contracts (3)	2	1		2
Interest rate collar agreements (4)	2	—		3

(1)Included in prepaid expenses and other on the consolidated balance sheets.

(2)Included in other non-current assets on the consolidated balance sheets.

(3)Included in accrued and other current liabilities on the consolidated balance sheets.

(4)Included in other non-current liabilities on the consolidated balance sheets.

The Company’s derivatives consist of interest rate swap and collar agreements and foreign currency forward exchange contracts. The fair values of the interest rate swap and collar agreements were derived by taking the net present value of the expected cash flows using observable market inputs (Level 2) such as SOFR rate curves, futures, volatilities and basis spreads (when applicable). The fair values of the foreign currency forward exchange contracts were derived by using Level 2 inputs based on observable spot and forward exchange rates in active markets. There has not been any impact to the fair value of derivative liabilities due to the Company’s own credit risk. Similarly, there has not been any material impact to the fair value of derivative assets based on the Company’s evaluation of counterparties’ credit risks.

The fair value of cash and cash equivalents, trade accounts receivable-net, accounts payable and borrowings under the Securitization Facility approximated carrying value at September 30, 2026 and 2025 due to the short-term nature of these financial instruments or, in the case of the Securitization Facility, its variable interest rate (Level 2).

The estimated fair value of the Company’s term loans was based on information provided by the agent under the Company’s Credit Agreement (Level 2). The estimated fair values of the Company’s notes were based upon quoted market prices (Level 1). The carrying value of long-term debt, including the current portion and excluding borrowings under the Securitization Facility, government refundable advances, finance lease obligations, debt issuance costs, original issue discount and premium, and the fair value of long-term debt are as follows (in millions):


	September 30, 2026				September 30, 2025
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current portion	$	33,772	$	33,351	$	29,224	$	29,574

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12. INCOME TAXES

The Company’s income from continuing operations before income taxes includes the following components for the periods shown below (in millions):


	Fiscal Years Ended September 30,
	2026		2025		2024
United States	$	2,202	$	2,119	$	1,800
Foreign	562		510		415
	$	2,764	$	2,629	$	2,215

The Company’s income tax provision (benefit) on income from continuing operations consists of the following for the periods shown below (in millions):


	Fiscal Years Ended September 30,
	2026		2025		2024
Current
Federal	$	424	$	420	$	354
State	67		45		38
Foreign	117		100		98
	608		565		490
Deferred
Federal	23		(32)		(6)
State	6		1		7
Foreign	19		21		9
	48		(10)		10
	$	656	$	555	$	500

The Company adopted ASU 2023-09 on a prospective basis beginning with the 2026 annual reporting period. Reconciliations between the U.S. federal statutory income tax rate and the effective income tax rate consist of the following for the period shown below (in millions):


	Fiscal Year Ended September 30, 2026
	Amount		Percent
Federal statutory income tax rate	$	580	21.0	%
State and local income taxes, net of federal income tax effect (1)	59		2.1	%
Foreign tax effects	31		1.1	%
Effect of changes in tax laws or rates enacted in the current period	—		—	%
Effect of cross-border tax laws:
Foreign-derived intangibles income	(47)		(1.7)	%
Other	24		0.8	%
Tax credits	(29)		(1.0)	%
Changes in valuation allowances:
Federal valuation allowance - 163j	48		1.7	%
Nontaxable or nondeductible items	(14)		(0.5)	%
Changes in unrecognized tax benefits	(1)		—	%
Other adjustments	5		0.2	%
Income tax expense and effective tax rate	$	656	23.7	%

(1)State taxes in California, Illinois, and New Jersey made up the majority (greater than 50 percent) of the tax effect in this category.

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A reconciliation from the statutory federal income tax rate to our effective income tax rate, applying ASC 740 prior to the adoption of ASU 2023-09, consists of the following for the periods shown below:


	Fiscal Years Ended September 30,
	2025		2024
Federal statutory income tax rate	21.0	%	21.0	%
Changes in valuation allowances impacting results	3.7	%	4.0	%
State and local income taxes, net of federal benefit	0.9	%	1.3	%
Foreign-derived intangibles income	(1.6)	%	(1.2)	%
Stock-based compensation	(2.9)	%	(3.6)	%
Other—net	—	%	1.1	%
Effective income tax rate	21.1	%	22.6	%

The components of the deferred taxes consist of the following (in millions):


	September 30, 2026		September 30, 2025
Deferred tax assets:
Interest expense limitation	$	479	$	419
Employee benefits	150		131
Inventories	130		99
Net operating losses	58		59
Capitalized research and development costs	45		86
Other	1		14
Total deferred tax assets	863		808
Valuation allowance	(516)		(456)
Net deferred tax assets	347		352
Deferred tax liabilities:
Intangible assets	(1,042)		(1,012)
Outside basis differences	(194)		—
Property, plant and equipment	(134)		(99)
Total deferred tax liabilities	(1,370)		(1,111)
Total net deferred tax (liabilities) assets	$	(1,023)	$	(759)

At September 30, 2026, the Company has state net operating loss carryforwards of approximately $620 million, German net operating loss carryforwards of $87 million and United Kingdom net operating loss carryforwards of approximately $52 million that expire in various fiscal years from 2027 to 2046. The Company has U.S. and non-U.S. tax credit carryforwards of $3 million that expire beginning in fiscal year 2027.

The deferred tax assets for the interest expense limitation, net operating losses, and tax credit carryforwards are reduced by a valuation allowance for the amount of such assets that the Company believes will not be realized.

With limited exception, no provision has been made for income taxes on undistributed earnings of foreign subsidiaries at September 30, 2026, since it is the Company’s intention to indefinitely reinvest such undistributed earnings. The cash that is permanently reinvested is typically used to expand operations either organically or through acquisitions. It is not practicable to estimate the additional taxes that would be payable on the remittance of such earnings. We have provided for taxes in jurisdictions in which we are not considered indefinitely reinvested, however, such amounts are not significant.

The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction and various state, local and foreign jurisdictions. The Company is no longer subject to U.S. federal examinations for years before fiscal 2022. The Company is currently under examination for its federal income taxes in Canada for fiscal years 2018 through 2019, in France for fiscal years 2020 through 2022, and in Germany for fiscal years 2017 through 2024. In addition, the Company is subject to state income tax examinations for fiscal years 2015 and later.

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The following schedule presents the changes in deferred tax asset valuation allowance as follows (in millions):


Fiscal Year Ended September 30,	Balance at Beginning of Period	Charged to Income Tax Expense		Balance at End of Period
2026	$456	$	60	$	516
2025	318	138		456
2024	227	91		318

Total income taxes paid, net of refunds, by material jurisdiction in accordance with the adoption of ASU 2023-09 consists of the following for the period shown below (in millions):


	September 30, 2026
U.S. federal	$	420
State and local	58
Foreign
Germany	48
Other	73
	$	599

The Company does not have material unrecognized tax benefits as of September 30, 2026 and 2025. The Company classifies all income tax-related interest and penalties as income tax expense, which were not material for the fiscal years ended September 30, 2026 and 2025. As of September 30, 2026 and 2025, the Company’s accrual for interest and penalties was not material.

13. COMMITMENTS AND CONTINGENCIES

Legal Proceedings – During the ordinary course of business, the Company is from time to time threatened with, or may become a party to, legal actions and other proceedings such as product liability claims, employee claims, workers’ compensation claims and class action lawsuits. Insurance may cover some of the costs associated with these claims and proceedings. While the Company is currently involved in certain legal proceedings, it believes the results will not have a material adverse effect on its financial condition, results of operations or cash flows, and it does not believe a loss in excess of amounts accrued is reasonably possible.

Environmental Liabilities – The Company’s operations and facilities are subject to federal, state, local and foreign environmental laws and regulations, and the Company is currently involved in the investigation and remediation of a number of sites, including sites at which it has been identified as a potentially responsible party under federal and state superfund laws. Liabilities are recorded when they are probable and the costs are reasonably estimable, which is generally no later than completion of a feasibility study or when the Company has recommended a remedy or committed to a plan of action. The estimates are based on current facts, laws, regulations and technology and reflect anticipated allocations among potentially responsible parties. They are not discounted, do not consider inflation and are not offset by possible insurance or other third-party recoveries. Because of uncertainties about the nature and extent of contamination, remediation alternatives, evolving standards and the responsibility of other parties, adjustments to the accruals will likely be necessary as investigation and remediation proceed. The Company does not have material liabilities for environmental remediation obligations at September 30, 2026 and 2025.

Commitments – The Company uses letters of credit to support certain payment and performance obligations. Letters of credit reduce the amount available for borrowing under the revolving credit facility. As of September 30, 2026, the Company had $45 million of letters of credit outstanding, none of which had been drawn. Refer to Note 10, “Debt,” Note 17, “Leases,” and Note 20, “Redeemable Noncontrolling Interests,” for information on the Company’s other commitments.

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14. STOCK REPURCHASE PROGRAM

The authorized capital stock of TD Group consists of 224,400,000 shares of $.01 par value common stock and 149,600,000 shares of $.01 par value preferred stock. The total number of shares of common stock issued at September 30, 2026 and 2025 was 62,984,285 and 62,465,317, respectively. The total number of shares held in treasury was 8,406,114 and 6,089,675 at September 30, 2026 and 2025, respectively. There were no shares of preferred stock outstanding at September 30, 2026 and 2025. The terms of the preferred stock have not been established.

On January 27, 2022, the Board of Directors of the Company (the “Board”) authorized a stock repurchase program permitting repurchases of up to $2.2 billion of the Company’s outstanding shares (referred to herein as the “existing stock repurchase program”), replacing the $650 million stock repurchase program. In November 2025, the Board increased the authorization under the existing stock repurchase program by $5.0 billion. Repurchases are subject to any restrictions in the Credit Agreement and the indentures governing the Subordinated Notes and Secured Notes. There is no expiration date for the existing stock repurchase program.

During fiscal 2026, the Company repurchased 2,316,439 shares of common stock at an average price of $1,187.21 per share, for a total amount of $2,750 million. The repurchased shares of common stock are classified as treasury stock in the statement of changes in stockholders’ deficit. As of September 30, 2026, $3,038 million remained available for repurchase under the existing stock repurchase program.

15. SEGMENTS

The Company’s businesses are organized and managed in three reportable segments: Power & Control, Airframe and Non-aviation.

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The Company’s segments are reported on the same basis used internally by our Chief Operating Decision Maker (“CODM”) for evaluating performance and for allocating resources. The Company’s CODM is collectively the President and Chief Executive Officer and Co-Chief Operating Officers. The primary measurement used internally by our CODM and management to review and assess the operating performance of each segment is EBITDA As Defined. Actual results are compared to plan, forecast and prior year on a monthly basis. The Company defines EBITDA As Defined as earnings before interest, taxes, depreciation and amortization plus certain non-operating items recorded as corporate expenses including non-cash compensation charges incurred in connection with the Company’s stock option or deferred compensation plans, foreign currency gains and losses, acquisition-integration costs, acquisition transaction-related expenses, and refinancing costs. Acquisition transaction and integration-related expenses represent costs incurred to integrate acquired businesses into TD Group’s operations; facility relocation costs and other acquisition-related costs; transaction and valuation-related costs for acquisitions comprising deal fees, legal, financial and tax due diligence expenses; amortization expense of inventory step-up recorded in connection with the purchase accounting of acquired businesses.

The accounting policies for each segment are the same as those described in the summary of significant accounting policies in Note 1 to the Company’s consolidated financial statements. Intersegment sales and transfers are recorded at values based on market prices, which creates intercompany profit on intersegment sales or transfers that is eliminated in consolidation. Intersegment sales were immaterial for the periods presented below. Corporate consists of our corporate offices. Corporate expenses consist primarily of compensation, benefits, professional services and other administrative costs incurred by the corporate offices. Corporate assets consist primarily of cash and cash equivalents. Corporate expenses and assets reconcile reportable segment data to the consolidated totals. An immaterial amount of corporate expenses is allocated to the operating segments.

The following table sets forth, for the periods indicated, certain financial information by reportable segment, which includes a reconciliation of EBITDA As Defined to consolidated income from continuing operations before income taxes (in millions):


	Fiscal Year Ended September 30, 2026
	Power & Control		Airframe		Non-aviation	Total
Net sales to external customers
Commercial and non-aerospace OEM	$	1,128	$	1,330		$	2,458
Commercial and non-aerospace aftermarket	1,784		1,643			3,427
Defense	2,861		1,630			4,491
Non-aviation	—		—		181	181
Net sales	5,773		4,603		181	10,557
Less:
Other segment expenses (1)	2,675		2,104		102
Total segment EBITDA As Defined	3,098		2,499		79	5,676
Less: Unallocated corporate EBITDA As Defined						113
Depreciation and amortization expense						445
Interest expense-net						2,008
Acquisition transaction and integration-related expenses						101
Non-cash stock and deferred compensation expense						158
Refinancing costs						28
Other, net						59
Income from continuing operations before income taxes						$	2,764

(1)Primarily represents cost of sales, selling expenses, general and administrative expenses, research and development, and miscellaneous income or expense. Excludes depreciation and amortization; non-cash stock and deferred compensation expense; foreign currency transaction gains or losses; acquisition transaction and integration-related expenses and payroll withholding taxes related to dividend equivalent payments.

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	September 30, 2026
	Power & Control		Airframe		Non-aviation		Corporate (1)		Total
Total assets	$	15,115	$	10,525	$	219	$	2,155	$	28,014
Capital expenditures	151		114		8		1		274
Depreciation and amortization	245		194		6		—		445

(1)Corporate consists of our corporate offices and does not constitute an operating segment. These amounts are included to reconcile to total consolidated assets, capital expenditures and depreciation and amortization, respectively.


	Fiscal Year Ended September 30, 2025
	Power & Control		Airframe		Non-aviation	Total
Net sales to external customers
Commercial and non-aerospace OEM	$	926	$	1,180		$	2,106
Commercial and non-aerospace aftermarket	1,360		1,444			2,804
Defense	2,273		1,488			3,761
Non-aviation	—		—		160	160
Net sales	4,559		4,112		160	$	8,831
Less:
Other segment expenses (1)	1,964		1,902		93
Total segment EBITDA As Defined	2,595		2,210		67	4,872
Less: Unallocated corporate EBITDA As Defined						112
Depreciation and amortization expense						367
Interest expense-net						1,572
Acquisition transaction and integration-related expenses						42
Non-cash stock and deferred compensation expense						157
Refinancing costs						11
Other, net						(18)
Income from continuing operations before income taxes						$	2,629


	September 30, 2025
	Power & Control		Airframe		Non-aviation		Corporate (1)		Total
Total assets	$	9,859	$	10,267	$	202	$	2,581	$	22,909
Capital expenditures	108		103		9		2		222
Depreciation and amortization	180		181		6		—		367

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	Fiscal Year Ended September 30, 2024
	Power & Control		Airframe		Non-aviation	Total
Net sales to external customers
Commercial and non-aerospace OEM	$	841	$	1,280		$	2,121
Commercial and non-aerospace aftermarket	1,218		1,290			2,508
Defense	1,907		1,239			3,146
Non-aviation	—		—		165	165
Net sales	3,966		3,809		165	$	7,940
Less:
Other segment expenses (1)	1,715		1,847		99
Total segment EBITDA As Defined	2,251		1,962		66	4,279
Less: Unallocated corporate EBITDA As Defined						106
Depreciation and amortization expense						312
Interest expense-net						1,286
Acquisition transaction and integration-related expenses						70
Non-cash stock and deferred compensation expense						217
Refinancing costs						58
Other, net						15
Income from continuing operations before income taxes						$	2,215


	September 30, 2024
	Power & Control		Airframe		Non-aviation		Corporate (1)		Total
Total assets	$	9,180	$	10,045	$	193	$	6,168	$	25,586
Capital expenditures	90		73		2		—		165
Depreciation and amortization	133		172		6		1		312

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Geographic Area Information

Net sales are measured based on the geographic destination of sales. Long-lived assets consist of property, plant and equipment-net and operating lease right-of-use assets, and are attributed to the country in which the assets are physically located. Net sales and long-lived assets of individual countries outside of the United States are not material.

The following table presents net sales by geographic area (in millions):


	Fiscal Years Ended September 30,
	2026		2025		2024
Net sales
United States	$	6,859	$	5,535	$	5,032
Foreign Countries	3,698		3,296		2,908
	$	10,557	$	8,831	$	7,940

The following table presents long-lived assets by geographic area (in millions):


	September 30, 2026		September 30, 2025		September 30, 2024
Long-lived assets
United States	$	1,541	$	1,339	$	1,273
Foreign Countries	383		305		276
	$	1,924	$	1,644	$	1,549

16. STOCK-BASED COMPENSATION

The Company’s equity compensation plans are designed to assist the Company in attracting, retaining, motivating and rewarding key employees, directors or consultants, and promoting the creation of long-term value for stockholders by closely aligning the interests of these individuals with those of the Company’s stockholders. The Company’s equity compensation plans provide for the granting of stock options.

Non-cash stock compensation expense recognized by the Company during the fiscal years ended September 30, 2026, 2025 and 2024 was $146 million, $152 million and $188 million, respectively. Of the total non-cash stock compensation expense recorded in fiscal 2026, 2025 and 2024, $15 million, $15 million and $18 million, respectively, was recorded as a component of cost of sales and $131 million, $137 million and $170 million, respectively, was recorded as a component of selling and administrative expenses on the consolidated statements of income. The related tax benefit for the fiscal years ended September 30, 2026, 2025 and 2024 was $28 million, $24 million and $24 million, respectively. Of the total non-cash stock compensation expense recorded in fiscal 2026, 2025 and 2024, $170 million, $150 million and $134 million was recorded as a component of additional paid-in capital and $(24) million, less than $2 million and $54 million was recorded as a component of other non-current liabilities (as further discussed below).

The liability awards relate to (1) stock options granted between fiscal 2017 and fiscal 2020 from the 2014 stock option plan and (2) stock options that the Company expects to grant in fiscal 2027 from the 2019 stock option plan, for which compensation cost is being accrued during fiscal 2026 because the service period began before the grant date. Until the options are granted, the Company recognizes compensation cost for the service rendered based on the fair value of the expected awards, remeasured at the end of each reporting period. Upon grant, the liability will be remeasured to fair value on the grant date. In each case, the options are provided to certain employees in lieu of these individuals receiving salary and/or bonus compensation paid in cash. The vesting of the stock options is subject to the achievement of the same operating performance goals as other grants. The liability is remeasured each reporting period based on the results of the Black-Scholes option-pricing model on the last day of the reported period. The fiscal 2026 amount includes a $24 million benefit from the remeasurement of liability awards. The liability for these awards, included in other non-current liabilities, was $67 million and $102 million as of September 30, 2026 and 2025, respectively.

The weighted-average grant date fair value of options granted during the fiscal years ended September 30, 2026, 2025 and 2024 was $519.89, $549.03 and $397.31, respectively. The total fair value of options vested during fiscal years ended September 30, 2026, 2025 and 2024 was $136 million, $107 million and $97 million, respectively. Cash proceeds received from exercises of stock options for the fiscal years ended September 30, 2026, 2025 and 2024 were $155 million, $166 million and $245 million, respectively.

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Compensation expense is recognized based upon probability assessments of awards that are expected to vest in future periods, adjusted for expected forfeitures. Such probability assessments are subject to revision and, therefore, unrecognized compensation expense is subject to future changes in estimate. As of September 30, 2026, there was approximately $265 million of total unrecognized compensation expense related to non-vested awards expected to vest, which is expected to be recognized over a weighted-average period of 1.8 years.

The fair value of the Company’s employee stock options was estimated at the date of grant using a Black-Scholes option-pricing model with the following weighted average assumptions for all options granted during the periods presented in the table below:


	Fiscal Years Ended September 30,
	2026	2025	2024
Risk-free interest rate	3.9% to 4.5%	4.0% to 4.5%	4.1% to 4.7%
Expected life of options	6.5 years	6.5 years	6.5 years
Expected dividend yield of stock	—	—	—
Expected volatility of stock	32.5%	32.5%	33.5%

The risk-free interest rate is based upon the U.S. Treasury bond rates with a term similar to the expected life of the award as of the grant date. The average expected life of stock-based awards is based on the Company’s actual historical exercise experience. The Company uses actual historical changes in the market value of its stock to calculate the volatility assumption as it is management’s belief that this is the best indicator of future volatility. The Company estimates stock option forfeitures based on historical data. The total number of stock options expected to vest is adjusted by actual and estimated forfeitures. Changes to the actual and estimated forfeitures will result in a cumulative adjustment in the period of change. Notwithstanding the special dividends declared and paid from time to time, the Company historically has not declared and paid regular cash dividends and does not anticipate doing so in future periods. No dividend yield is assumed because dividend equivalents are paid on vested options and accrue on unvested options, so option holders are not disadvantaged by dividends declared on the underlying shares. Accordingly, the Black-Scholes fair value is not reduced for expected dividends.

2019 Stock Option Plan

In August 2019, the Board of Directors of TD Group adopted a new stock option plan, which was subsequently approved by stockholders on October 3, 2019. The 2019 stock option plan permits TD Group to award stock options to our key employees, directors or consultants. The total number of shares of TD Group common stock reserved for issuance or delivery under the 2019 stock option plan is 4,000,000, subject to adjustment in the event of any stock dividend or split, reorganization, recapitalization, merger, share exchange or any other similar corporate transaction or event. Options granted under this plan may be outstanding for a maximum of 10 years from the date of grant. The Company will issue new shares upon exercise of the stock options.

Performance Vested Stock Options – Generally all of the options granted through September 30, 2026 under the 2019 stock option plan have been pursuant to an equity incentive program adopted by the Company in 2008. Under the 2008 equity incentive program, generally all of the options granted will vest based on the Company’s achievement of established operating performance goals, typically over a five year period. The following table summarizes the activity, pricing and other information for the Company’s performance vested stock-based award activity during the fiscal year ended September 30, 2026:


	Number of Options	Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at September 30, 2025	759,608	$	1,020.20
Granted	631,757	1,256.82
Exercised	(19,970)	729.42
Forfeited	(127,777)	1,153.67
Expired	(2,394)	1,305.54
Outstanding at September 30, 2026	1,241,224	$	1,131.02	8.3 years	$	111,598,907
Expected to vest	747,635	$	1,170.62	8.6 years	$	41,596,994
Exercisable at September 30, 2026	174,374	$	866.87	6.8 years	$	47,466,690

At September 30, 2026, there were 2,708,865 remaining shares available for award under TD Group’s 2019 stock option plan.

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2014 Stock Option Plan

In July 2014, the Board of Directors of TD Group adopted the 2014 stock option plan, which was subsequently approved by stockholders on October 2, 2014. The 2014 stock option plan permitted TD Group to award stock options to our key employees, directors or consultants. The total number of shares of TD Group common stock reserved for issuance or delivery under the 2014 stock option plan was 5,000,000, subject to adjustment in the event of any stock dividend or split, reorganization, recapitalization, merger, share exchange or any other similar corporate transaction or event. The 2014 stock option plan expired on July 24, 2024 and no further shares may be granted under the plan thereafter. Options granted under this plan may be outstanding for a maximum of 10 years from the date of grant. The Company will issue new shares upon exercise of the stock options.

Performance Vested Stock Options – Generally all of the options granted through September 30, 2026 under the 2014 stock option plan have been pursuant to an equity incentive program adopted by the Company in 2008. Under the 2008 equity incentive program, generally all of the options granted will vest based on the Company’s achievement of established operating performance goals, typically over a five year period. The following table summarizes the activity, pricing and other information for the Company’s performance vested stock-based award activity during the fiscal year ended September 30, 2026:


	Number of Options	Weighted-Average Exercise Price Per Option		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at September 30, 2025	3,230,926	$	487.45
Granted	—	—
Exercised	(495,226)	281.30
Forfeited	(73,165)	616.14
Expired	—	—
Outstanding at September 30, 2026	2,662,535	$	522.25	3.5 years	$	1,676,206,812
Expected to vest	191,041	$	670.36	6.4 years	$	79,803,044
Exercisable at September 30, 2026	2,207,899	$	422.39	3.0 years	$	1,459,127,942

The total intrinsic value of performance options exercised during the fiscal years ended September 30, 2026, 2025 and 2024 was $516 million, $600 million and $794 million, respectively.

Dividends and Dividend Equivalent Plans

Pursuant to the Amended and Restated 2014 Stock Option Plan Dividend Equivalent Plan and the 2019 Stock Option Plan Dividend Equivalent Plan, all of the vested options granted under the existing stock option plans, except for grants to the members of the Board of Directors, are entitled to dividend equivalent payments in the event of the declaration of a dividend by the Company. No dividends were declared in fiscal 2026.

Dividend equivalent payments are made during the Company’s first fiscal quarter each year and also upon payment of any dividends declared. Total dividend equivalent payments were $59 million, $208 million and $233 million during the fiscal years ended September 30, 2026, 2025 and 2024, respectively. At September 30, 2026, there was $54 million recorded in accrued and other current liabilities and $52 million recorded in other non-current liabilities on the consolidated balance sheets related to future dividend equivalent payments.

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17. LEASES

The Company leases manufacturing facilities, offices, land, equipment and vehicles. Such leases, some of which are noncancellable and, in many cases, include renewals, expire at various dates. Such options to renew are included in the lease term when it is reasonably certain that the option will be exercised. The Company’s lease agreements typically do not contain any significant residual value guarantees or restrictive covenants, and payments within certain lease agreements are adjusted periodically for changes in an index or rate.

The Company determines if an arrangement is a lease at inception. Lease assets and liabilities are recognized at the commencement date of the lease based on the present value of lease payments over the lease term. Lease assets represent the Company’s right to use an underlying asset for the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The discount rate implicit in the Company’s leases is generally not determinable, and therefore the Company uses its incremental borrowing rate, which is determined based on the lease term and the currency in which lease payments are made. The lease term includes options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options.

Leases are classified as either operating or finance leases based on the criteria in ASC 842. Operating lease cost is recognized on a straight-line basis over the lease term. Finance lease right-of-use assets are amortized on a straight-line basis over the shorter of the lease term or the useful life of the underlying asset, and interest on finance lease liabilities is recognized using the effective interest method. Where the lease transfers ownership or the Company is reasonably certain to exercise a purchase option, the asset is amortized over its useful life. The Company has made an accounting policy election not to recognize lease assets or liabilities for leases with a term of twelve months or less. The Company has also elected, for all classes of underlying assets, not to separate non-lease components, such as related services, from lease components, and accounts for them as a single lease component.

The components of lease expense for the fiscal years ended September 30, 2026, 2025 and 2024 are as follows (in millions):


		Fiscal Years Ended September 30,
	Classification	2026		2025		2024
Operating lease cost	Cost of sales or selling and administrative expenses	$	34	$	23	$	22
Finance lease cost:
Amortization of leased assets	Cost of sales	18		15		12
Interest on lease liabilities	Interest expense-net	22		19		16
Total lease cost		$	74	$	57	$	50

Supplemental cash flow information related to leases for the fiscal years ended September 30, 2026, 2025 and 2024 is as follows (in millions):


	Fiscal Years Ended September 30,
	2026		2025		2024
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash outflows from operating leases	$	33	$	23	$	21
Operating cash outflows from finance leases	17		16		14
Financing cash outflows from finance leases	8		7		6

Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$	55	$	25	$	21
Finance leases	49		25		83

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Supplemental balance sheet information related to leases is as follows (in millions):


	Classification	September 30, 2026		September 30, 2025
Operating Leases
Operating lease right-of-use assets	Other non-current assets	$	92	$	65

Current operating lease liabilities	Accrued and other current liabilities	22		15
Long-term operating lease liabilities	Other non-current liabilities	74		51
Total operating lease liabilities		$	96	$	66

Finance Leases
Finance lease right-of-use assets, net	Property, plant and equipment-net	$	307	$	264

Current finance lease liabilities	Current portion of long-term debt	12		8
Long-term finance lease liabilities	Long-term debt	332		276
Total finance lease liabilities		$	344	$	284

As of September 30, 2026 and 2025 the Company has the following remaining lease term and weighted average discount rates:


	September 30, 2026	September 30, 2025
Weighted-average remaining lease term
Operating leases	5.2 years	6.4 years
Finance leases	20.0 years	19.8 years

Weighted-average discount rate
Operating leases	6.0%	5.7%
Finance leases	6.9%	7.0%

Future maturities of lease liabilities are as follows (in millions):


Fiscal Years Ended September 30,	Operating Leases		Finance Leases
2027	$	27	$	29
2028	21		30
2029	17		31
2030	12		31
2031	9		32
Thereafter	35		509
Total future minimum lease payments	121		662
Less: imputed interest	25		318
Total lease liabilities	$	96	$	344

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18. DERIVATIVES AND HEDGING ACTIVITIES

The Company is exposed to, among other things, the impact of changes in interest rates and foreign currency exchange rates in the normal course of business. The Company’s risk management program is designed to manage the exposure and volatility arising from these risks, and utilizes derivative financial instruments to offset a portion of these risks. The Company uses derivative financial instruments only to the extent necessary to hedge identified business risks and does not enter into such transactions for trading purposes. The Company generally does not require collateral or other security with counterparties to these financial instruments and is therefore subject to credit risk in the event of nonperformance; however, the Company monitors credit risk and currently does not anticipate nonperformance by other parties. The Company has agreements with each of its swap and collar counterparties that contain a provision whereby if the Company defaults on the Credit Agreement, the Company could also be declared in default on its swaps and collars resulting in an acceleration of settlement under the swaps and collars.

All derivative financial instruments are recorded at fair value in the consolidated balance sheets. For a derivative that has not been designated as an accounting hedge, the change in the fair value is recognized immediately through earnings. For a derivative that has been designated as an accounting hedge of an existing asset or liability (a fair value hedge), the change in the fair value of both the derivative and underlying asset or liability is recognized immediately through earnings. For a derivative designated as a cash flow hedge of a forecasted transaction, the entire change in the fair value of the derivative is recorded in accumulated other comprehensive income (loss) and reclassified into earnings in the same period the hedged transaction affects earnings.

Interest Rate Swap and Collar Agreements – Interest rate swap and collar agreements are used to manage interest rate risk associated with floating rate borrowings, specifically the term loans under the Credit Agreement. Under the swap agreements, the Company receives floating rate payments in exchange for making fixed rate payments over the term of the agreements, without an exchange of the underlying principal amount. Under the collar agreements, the Company pays the counterparties if the elected tenor’s Term SOFR falls below the floor rate, and the counterparties pay the Company if it exceeds the cap rate. No payments are exchanged under the collar agreements unless Term SOFR is above the cap or below the floor. Together, these agreements reduce the impact of interest rate movements on future interest expense.

The interest rate swap and collar agreements are designated and qualify as cash flow hedges. The entire change in the fair value of these instruments is recorded in accumulated other comprehensive income (loss) and is reclassified into interest expense-net in the period during which the hedged interest payments affect earnings. Cash flows related to the derivative contracts are included in cash flows from operating activities on the consolidated statements of cash flows.

During the third quarter of fiscal 2026, the Company entered into new interest rate collar agreements aggregating to a notional amount of $800 million with an effective date of June 30, 2026 and maturity date of September 30, 2030. The rate floor is 2.50% and cap is 4.50%.

The tables below summarize the key terms of the swaps and collars as of September 30, 2026 (aggregated by effective date).

Interest rate swap agreements:

Aggregate Notional Amount (in millions)

Effective Date

Maturity Date

Conversion of Related Variable Rate Debt subject to Term SOFR to Fixed Rate of:

$700

9/30/2025

9/30/2027

3.22% plus applicable margin percentage

$125

9/30/2027

9/30/2029

3.11% plus applicable margin percentage

$1,025

9/30/2027

9/30/2029

3.12% plus applicable margin percentage

$900

9/30/2027

9/30/2029

3.14% plus applicable margin percentage

Interest rate collar agreements:

Aggregate Notional Amount (in millions)

Effective Date

Maturity Date

Offsets Variable Rate Debt Attributable to Fluctuations Below and Above:

$1,338

9/30/2025

9/30/2027

Three-month Term SOFR rate of 2.50% (floor) and 4.50% (cap)

$700

9/30/2025

9/30/2027

Three-month Term SOFR rate of 2.00% (floor) and 3.91% (cap)

$800

6/30/2026

9/30/2030

Three-month Term SOFR rate of 2.50% (floor) and 4.50% (cap)

$1,550

9/30/2026

9/30/2027

Three-month Term SOFR rate of 2.50% (floor) and 4.50% (cap)

$2,050

9/30/2027

9/30/2029

Three-month Term SOFR rate of 2.21% (floor) and 4.25% (cap)

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Certain derivative asset and liability balances are offset where master netting agreements provide for the legal right of setoff. For classification purposes, the Company records the net fair value of each type of derivative position that is expected to settle in less than one year with each counterparty as a net current asset or liability and each type of long-term position as a net non-current asset or liability. The amounts shown in the table below represent the gross amounts of recognized assets and liabilities, the amounts offset in the consolidated balance sheets and the net amounts of assets and liabilities presented therein (in millions):


	September 30, 2026				September 30, 2025
	Asset		Liability		Asset		Liability

Interest rate collar agreements	63		—		7		3
Interest rate swap agreements	73		—		8		—


Net derivatives as classified in the consolidated balance sheets (1)	$	136	$	—	$	15	$	3

(1)Refer to Note 11, “Fair Value Measurements,” for the consolidated balance sheets classification of the Company’s interest rate swap and collar agreements. The increase in the fair value of the interest rate swap and collar agreements is primarily attributable to increases in forward Term SOFR rates compared to September 30, 2025.

Based on the fair value amounts determined as of September 30, 2026, the estimated net amount of existing gains and caplet amortization expected to be reclassified into interest expense-net within the next twelve months is approximately $11 million.

Foreign Currency Forward Exchange Contracts – The Company transacts business in various foreign currencies, which subjects the Company’s cash flows and earnings to exposure related to changes in foreign currency exchange rates. These exposures arise primarily from purchases or sales of products and services from third parties. Foreign currency forward exchange contracts provide for the purchase or sale of foreign currencies at specified future dates at specified exchange rates, and are used to offset changes in the fair value of certain assets or liabilities or forecasted cash flows resulting from transactions denominated in foreign currencies. At September 30, 2026, the Company has outstanding foreign currency forward exchange contracts to sell U.S. dollars with notional amounts of $128 million. The maximum duration of the Company’s foreign currency cash flow hedge contracts at September 30, 2026 is twelve months. These notional values consist of contracts for the Canadian dollar and the euro and are stated in U.S. dollar equivalents at spot exchange rates at the respective trade dates. Amounts related to foreign currency forward exchange contracts included in accumulated other comprehensive (income) loss in stockholders’ deficit are reclassified into net sales when the hedged transaction settles. As of September 30, 2026, the Company expects to record a net loss of approximately $1 million on foreign currency forward exchange contracts designated as cash flow hedges to net sales over the next twelve months.

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19. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table presents the total changes by component in accumulated other comprehensive income (loss), net of taxes, for the fiscal years ended September 30, 2026 and 2025 (in millions):


	Unrealized (losses) gains on derivatives (1)		Pension and post-retirement benefit plans adjustment (2)		Foreign currency translation adjustment (3)		Total
Balance at September 30, 2024	$	19	$	1	$	(62)	$	(42)


Net current-period other comprehensive (loss) income (4)	(23)		(3)		58		32
Balance at September 30, 2025	(4)		(2)		(4)		(10)


Net current-period other comprehensive income (loss) (4)	101		9		(66)		44
Balance at September 30, 2026	$	97	$	7	$	(70)	$	34

(1)Represents unrealized gains (losses) on derivatives designated and qualifying as cash flow hedges, net of tax (expense) benefit, of $(31) million and $8 million for the fiscal years ended September 30, 2026 and 2025, respectively.

(2)There were no material pension liability adjustments, net of taxes, related to activity for the defined pension plans and postretirement benefit plans for the fiscal years ended September 30, 2026 and 2025.

(3)Represents gains (losses) resulting from foreign currency translation of financial statements, including gains (losses) from certain intercompany transactions, into U.S. dollars at the rates of exchange in effect at the balance sheet dates. Refer to Note 1, “Summary of Significant Accounting Policies,” for additional information.

(4)Presented net of reclassifications out of accumulated other comprehensive income (loss) into earnings, specifically net sales and interest expense-net, for realized gains (losses) on derivatives designated and qualifying as cash flow hedges of $(3) million (net of taxes of $(1) million) and $14 million (net of taxes of $4 million), respectively, for the fiscal year ended September 30, 2026 and $(1) million (net of taxes of less than $(1) million) and $57 million (net of taxes of $18 million), respectively, for the fiscal year ended September 30, 2025.

20. REDEEMABLE NONCONTROLLING INTERESTS

The purchase agreements of JPE and VSA and P&I include a series of put and call options. The put options, held by the noncontrolling interest holders, provide the right to sell up to 100% of their remaining interest to the Company. The call options are held by the Company and provide it with the right to acquire from the noncontrolling interest holders up to 100% of their remaining interest. The redemption value is payable in cash and is primarily based on a formula using certain adjusted EBITDA metrics and a specified multiple.

The noncontrolling interests are classified as redeemable noncontrolling interests, outside of permanent equity, because the put options are not solely within the Company’s control. The rollforward of redeemable noncontrolling interests is presented in the consolidated statements of changes in stockholders’ deficit.

Redeemable noncontrolling interests are initially recorded at acquisition-date fair value. When a redeemable noncontrolling interest is currently redeemable or probable of becoming redeemable, it is adjusted to the greater of (i) its redemption value or (ii) its carrying amount, which is the initial amount adjusted for the holders’ share of earnings and distributions. The carrying amount of the redeemable noncontrolling interests as of September 30, 2026 was $85 million. The difference between the carrying amount and redemption value as of September 30, 2026 was not material.

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EXHIBIT INDEX

TO FORM 10-K FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 2026


Exhibit No.						Description
10.18						Form of Stock Option Agreement for Director and NEO options awarded in fiscal 2027*
21.1						Subsidiaries of TransDigm Group Incorporated
22.1						Listing of Subsidiary Guarantors
23.1						Consent of Independent Registered Public Accounting Firm
31.1						Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2						Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to Rule 13a-14(a) or 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1						Certification by Principal Executive Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2						Certification by Principal Financial Officer of TransDigm Group Incorporated pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS						Inline XBRL Instance Document: The XBRL Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH						Inline XBRL Taxonomy Extension Schema
101.CAL						Inline XBRL Taxonomy Extension Calculation Linkbase
101.DEF						Inline XBRL Taxonomy Extension Definition Linkbase
101.LAB						Inline XBRL Taxonomy Extension Label Linkbase
101.PRE						Inline XBRL Taxonomy Extension Presentation Linkbase
104						Cover Page Interactive Data File: the cover page XBRL tags are embedded within the Inline XBRL document and are contained within Exhibit 101