UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of July

GRUPO AEROPORTUARIO DEL CENTRO NORTE, S.A.B. DE C.V.

(Translation of Registrant’s Name Into English)

México

Torre Latitud, L501, Piso 5

Av. Lázaro Cárdenas 2225

Col. Valle Oriente, San Pedro Garza García

Nuevo León, México

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

(Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

(If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-             .)

OMA Announces Second Quarter 2026

Operating and Financial Results

Mexico City, Mexico, July 27, 2026—Mexican airport operator Grupo Aeroportuario del Centro Norte, S.A.B. de C.V., known as OMA (NASDAQ: OMAB; BMV: OMA), today reported its unaudited, consolidated financial and operating results for the Second Quarter 2026 (2Q26).

2Q26 summary

2Q26 Operating Results

Operations, Passengers, and Cargo

The number of seats offered decreased 0.3% compared to 2Q25.

During the quarter, 18 domestic and 6 international routes started operations.

Total passenger traffic reached 7.2 million passengers, an increase of 0.4% as compared to 2Q25. During the quarter, of total traffic, 86.1% was domestic and 13.9% was international.

Domestic passenger traffic grew 0.6%, as compared to 2Q25, while international traffic decreased by 1.2%.

The airports with the largest passenger traffic growth in volume terms as compared to 2Q25, were:

The airports with the largest passenger traffic decrease in volume terms as compared to 2Q25, were:

2

Commercial Operations

The commercial space occupancy rate in the passenger terminals was 96.4% as of June 30, 2026.

Freight Logistics Services

Hotel Services

Industrial Services

Consolidated Financial Results

Revenues

Aeronautical revenues increased 3.9% driven by domestic TUA revenue growth of 7.7%. International TUA revenues decreased by 8.7% due to the appreciation of the Mexican peso against the U.S. dollar, as well as the 1.2% decrease in international passenger traffic.

3

Non-aeronautical revenues increased 9.8%.

Commercial revenues increased 6.7%, while commercial revenues per passenger reached Ps.66.4, an increase of 6.3% versus 2Q25. The line items with the largest increases were:

Diversification revenues increased 17.4%, mainly due to de increase of revenues in OMA Carga.

4

Construction revenues represent the value of improvements to concessioned assets. They are equal to construction costs and generate neither a gain nor a loss. Construction revenues and costs are determined based on the advance in the execution of projects in accordance with the airports’ Master Development Programs (MDP), and variations depend on the rate of project execution.

Costs and Operating Expenses

The sum of cost of airport services and general and administrative expenses (G&A) increased 3.6% as compared to 2Q25, mainly due to increases in payroll, and contracted services.

The major maintenance provision expense was Ps.99.3 million, and reflects provision requirements under the recently approved master development program. The outstanding balance of the maintenance provision as of June 30, 2026 was Ps.2,912 million.

The airport concession tax increased 3.9% to Ps.293.8 million, as a result of the increase in revenues.

The technical assistance fee was Ps.69.0 million, 2.9% higher, as a result of the increase in EBITDA during the quarter.

Total operating costs and expenses increased 1.0% in the quarter.

5

Total operating costs and expenses increased 1.0% in the quarter.

Operating Income and Adjusted EBITDA

Operating Income was Ps.2,389 million, 4.1% higher than 2Q25, with an operating margin of 53.5%.

Adjusted EBITDA was Ps.2,722 million, 6.2% higher than 2Q25, with a margin of 75.2%.

Financing Expense and Net Income

Financing Expense was Ps.336.8 million compared to Ps.408.0 million in 2Q25.

Consolidated net income in the quarter was Ps.1,478 million, an increase of 10.2% as compared to 2Q25.

Earnings per share, based on net income of the controlling interest was Ps.3.80, and earnings per ADS was US$1.74. Each ADS represents eight Series B shares.

6

MDP and Strategic Investments

In 2Q26, capital investments and major maintenance works in the MDPs and strategic investments totaled Ps.949 million, comprised of Ps.844 million in improvements to concessioned assets, Ps.21 million in major maintenance and Ps.84 million in strategic investments.

Indebtedness

Derivatives

As of the date of this report, OMA has no financial derivatives exposure.

Cash Flow Statement

During 2Q26, cash flows from operating activities generated cash of Ps.1,759 million.

In the second quarter of 2026, investing activities used cash for Ps.776 million. Financing activities used cash for Ps.2,059 million during the quarter.

The net decrease in cash resulting from operating, investing and financing activities in 2Q26 was Ps.1,076 million. This, combined with the positive effect of changes in the value of cash of Ps.9.4 million, resulted in a Cash and Cash Equivalents balance as of June 30, 2026, of Ps.2,577 million.

7

Relevant Events

OMA announces the achievement of its Sustainability Performance Target. During the quarter, OMA achieved the Sustainability Performance Target (SPT) linked to its sustainability-linked bonds by achieving an 88% reduction in Scope 1 and Scope 2 greenhouse gas emissions per passenger by the end of 2025, surpassing the 58% reduction target from the 2018 baseline. The achievement was driven by energy efficiency and decarbonization initiatives, including the use of renewable energy, solar panels, battery storage systems, and the electrification of airport operations. The results were independently verified, reinforcing the Company's commitment to sustainability.

OMA issues Ps.3.0 billion in Long-Term Notes. On July 16, 2026, OMA issued long-term notes in the Mexican market for an aggregate amount of Ps.3.0 billion. Proceeds from the issuances were used to prepay Ps.1.7 billion of outstanding short-term bank debt, as well as to repay Ps.640 million corresponding to OMA 23L long-term notes maturing on July 24, 2026. The remaining proceeds will be used to fund committed investments under the Master Development Program and for general corporate purposes, including working capital requirements.

Publication of OMA’s 2025 IFRS S1/S2 Report. Today, OMA published its first IFRS S1/S2 Report, prepared in accordance with the sustainability-related disclosure requirements issued by the National Banking and Securities Commission (CNBV). The report provides information on the Company's governance, strategy, risk management, as well as metrics and targets related to sustainability and climate-related risks and opportunities that could reasonably be expected to affect the Company's prospects.

8

9

10

11

12

13

14

Notes to the Financial Information

Financial statements are prepared in accordance with International Financial Reporting Standards (“IFRS”), and presented in accordance with IAS 34 “Interim Financial Reporting.” For more information, please refer to our Quarterly Financial Information submitted to the Mexican Stock Exchange (www.bmv.com.mx)

Unless stated otherwise, all comparisons of operating or financial results are made with respect to the comparable period of 2025. The exchange rates used to convert foreign currency amounts were Ps.18.8483 as of June 30, 2025, and Ps.17.5053 as of June 30, 2026.

Construction revenue, construction cost: IFRIC 12 “Service Concession Arrangements” addresses how service concession operators should account for the obligations they undertake and rights they receive in service concession arrangements. The concession contracts for each of OMA’s airport subsidiaries establishes that the concessionaire is obligated to carry out improvements to the infrastructure transferred in exchange for the rights over the concession granted by the Federal Government. The latter will receive all the assets at the end of the concession period. As a result, the concessionaire should recognize, using the percentage of completion method, the revenues and costs associated with the improvements to the concessioned assets. The amount of the revenues and costs so recognized should be the price that the concessionaire pays or would pay in an arm’s length transaction for the execution of the works or the purchase of machinery and equipment, with no profit recognized for the construction or improvement. The application of IFRIC 12 does not affect operating income, net income, or EBITDA, but does affect calculations of margins based on total revenues.

Capital investments: includes investments in fixed assets (including investments in land, machinery, and equipment) and improvements to concessioned properties under the Master Development Plan (MDP) plus strategic investments.

Strategic Investments: Refers only to those capital investments additional to the Master Development Program.

Passengers and Terminal passengers: All references to passenger traffic volumes are to Terminal passengers, which includes passengers on the three types of aviation (commercial, charter, and general aviation), and excludes passengers in transit. The definition of terminal passengers of OMA may differ from the definition utilized by its shareholder VINCI Airports.

Adjusted EBITDA and Adjusted EBITDA margin: OMA defines Adjusted EBITDA as EBITDA less construction revenue plus construction expense and maintenance provision. We calculate the Adjusted EBITDA margin as Adjusted EBITDA divided by the sum of aeronautical revenue and non-aeronautical revenue. Construction revenue and construction cost do not affect cash flow generation and the maintenance provision corresponds to capital investments. OMA defines EBITDA as net income minus net comprehensive financing income, taxes, and depreciation and amortization. Neither Adjusted EBITDA nor EBITDA should be considered as an alternative to net income as an indicator of our operating performance, or as an alternative to cash flow as an indicator of liquidity. It should be noted that neither Adjusted EBITDA nor EBITDA is defined under IFRS, and may be calculated differently by different companies.

15

Analyst Coverage

In accordance with the requirements of the Mexican Stock Exchange, the analysts covering OMA are:

About OMA

Grupo Aeroportuario del Centro Norte, S.A.B. de C.V., known as OMA, operates 13 international airports in nine states of central and northern Mexico. OMA’s airports serve Monterrey, Mexico’s first largest metropolitan area, the tourist destinations of Acapulco, Mazatlán, and Zihuatanejo, and nine other regional centers and border cities. OMA also operates the NH Collection Hotel inside Terminal 2 of the Mexico City airport and the Hilton Garden Inn at the Monterrey airport. OMA employs over 1,200 persons in order to offer passengers and clients airport and commercial services in facilities. OMA is listed on the Mexican Stock Exchange (OMA) and on the NASDAQ Global Select Market (OMAB). Since December 2022, OMA is part of VINCI Airports, the world´s leading private airport operator.

Webpage: www.oma.aero

X: http://twitter.com/OMAeropuertos

Facebook https://www.facebook.com/OMAeropuertos

16

Pursuant to the requirements 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.

Dated: July 28, 2026