Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited combined financial statements and the related notes thereto included in the Company's prospectus filed with the SEC on April 16, 2026 pursuant to Rule 424(b) of the Securities Act of 1933, as amended, in connection with the Company's IPO (the "Prospectus"). See "Note 1. Organization and Nature of Operations" for further details regarding the IPO. The December 31, 2025 balance sheet was derived from the Company's audited combined financial statements. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the SEC. In the opinion of management, the unaudited condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, that are necessary for a fair presentation of the Company's condensed consolidated financial position, results of operations, and cash flows for the interim periods presented. Certain columns and rows may not add due to the use of rounded numbers. Quarterly results are not necessarily indicative of the results to be expected for the entire fiscal year. Following the Reorganization, the financial statements are presented on a condensed consolidated basis and all intercompany accounts and transactions have been eliminated in consolidation. For the periods prior to the Reorganization, the financial statements are presented on a condensed combined basis and combine: (i) the consolidated financial statements of Arcline Engineered Polymer Topco, L.P., (ii) the consolidated financial statements of Hawkeye TopCo, L.P., (iii) the consolidated financial statements of Connector TopCo, L.P., and (iv) the financial statements of Ovation TopCo, L.P., which include only the operations and entities contributed to Arxis, Inc. and therefore do not represent the full consolidated results of Ovation TopCo, L.P. For each of the aforementioned consolidated financial statements, all significant intercompany accounts and transactions have been eliminated in consolidation. Significant Accounting Policies There have been no material changes to the Company’s significant accounting policies from those described in the combined financial statements and related notes included in our March 31, 2026 Quarterly Report on Form 10-Q, except as described below. Share-Based Compensation The Company accounts for share-based compensation in accordance with ASC 718, Compensation-Stock Compensation (“ASC 718”), including certain receivables due from related parties, where recourse exists to the equity interests of the executive. Share-Based Compensation Arrangements The Company grants restricted shares ("RSAs") and restricted stock units ("RSUs") as part of its stock-based compensation arrangements. RSAs represent issued common shares that are subject to forfeiture until vesting conditions are satisfied. RSUs represent the right to receive common shares upon satisfaction of vesting conditions. RSAs and RSUs may include service conditions, performance conditions, or market conditions. The Company issued one share of convertible common stock to Arcline Arxis Advisory I, L.P. (“Arcline”) pursuant to the amended and restated advisory and consulting services agreement (the “Advisory and Consulting Agreement”), in exchange for advisory and consulting services. The award includes market conditions based on the price of the Company’s Class A common stock and a service condition tied to Arcline’s continued performance under the Advisory and Consulting Agreement. The award settles only in shares of the Company’s common stock or is forfeited for no consideration. See “Note 14. Equity” for the award’s conversion, redemption and forfeiture terms. The RSAs, RSUs, and convertible common stock described above are equity-classified awards. The convertible common stock is further presented within permanent equity because none of its features require or permit cash settlement. Share-Based Compensation Accounting Equity-classified awards are measured at grant date fair value and are not subsequently remeasured. Compensation cost for equity-classified time-based awards is recognized over the requisite service period. Compensation cost for equity-classified performance-based awards is recognized when the applicable performance condition is considered probable of achievement. Compensation cost for equity-classified awards with market conditions is recognized on a straight-line basis over the requisite service period regardless of whether the market condition is achieved, provided the requisite service is rendered. Liability-classified awards are initially measured at fair value on the grant date and subsequently remeasured at fair value at each reporting date until settlement. Compensation cost for liability-classified performance-based awards is recognized when the applicable performance condition is considered probable of achievement, for awards that are probable to vest. When the performance condition is event-based, the Company generally does not determine the performance condition is probable until such event occurs. Once vested, changes in fair value are recognized immediately in compensation expense until settlement. The fair value of each award is estimated on the date of grant using an Option Pricing Methodology (“OPM”), under a risk-neutral framework. For awards containing market conditions, the OPM incorporates the relevant market condition, including any minimum stock price thresholds or multiples required for conversion, vesting, or redemption. Liability-classified awards are remeasured at fair value at each reporting date using the same valuation methodology. A number of assumptions are used to determine the fair value of awards granted, including expected term, dividend yield, volatility, and the risk-free interest rate. The Company classifies share-based compensation within Selling, general and administrative expenses. Award forfeitures are accounted for as incurred. Forfeitures occurring after an award's requisite service period are treated as post-vesting events and do not result in reversal of previously recognized compensation cost. See “Note 15. Share-Based Arrangements” for further information, including the grant-date fair value, valuation assumptions and compensation expense recognized for the RSAs, RSUs, and convertible common stock, and “Note 16. Net Income (Loss) Per Share” for the convertible common stock’s treatment as a participating security. Convertible-Related Tax Receivable Agreement In connection with the convertible common stock, the Company entered into a Convertible-Related Tax Receivable Agreement ("TRA") pursuant to which it is contractually obligated to pay counterparties a specified percentage (85%) of the cash tax savings, if any, that the Company realizes from compensation deductions with respect to the convertible common stock award and related election under Section 83(b) of the Internal Revenue Code. The Company's obligations under its TRA represent contingent liabilities that are recognized in accordance with ASC 450, Contingencies ("ASC 450"), when payment is considered probable and the amount is reasonably estimable. Net cash tax savings are calculated by comparing the Company's actual income tax liability (determined using the actual applicable U.S. federal income tax rate and an assumed weighted-average state and local income tax rate) to the amount the Company would have been required to pay had it not been able to utilize any of the compensation deduction subject to the TRA. The TRA liability is recorded within Other long-term liabilities on the Condensed Consolidated Balance Sheets, with a corresponding charge to Selling, general and administrative expenses within the Condensed Consolidated Statements of Operations, at the point such recognition criteria are met. Because the timing and amount of future payments under the TRA depend on the Company's future taxable income, applicable tax rates, and the portion of tax benefits actually realized, actual amounts paid may differ materially from amounts accrued, and changes in estimates are recognized in the period identified within the Condensed Consolidated Statements of Operations. See “Note 14. Equity” for further information. Net Income (Loss) Per Share Basic net income (loss) per common share is computed by dividing net income (loss) attributable to the common shareholders by the weighted-average basic common shares outstanding. The Company utilizes the two-class method required for participating securities to compute net income (loss) per common share. Under the two-class method, net income for each period is allocated between the Company's common stockholders and the holders of the participating securities based on their respective rights to participate in dividends and undistributed earnings, assuming all such earnings for the period had been distributed. The Company considers its convertible common stock to be a participating security. Prior to satisfaction of the applicable conversion conditions, the holder of the convertible common stock is entitled to receive dividends, if any, on an as-converted basis, but is not contractually required to participate in the Company's losses. See "Note 14. Equity" for further discussion of the terms of the convertible common stock. The rights, including the liquidation and dividend rights, of the holders of Class A common stock, Class B common stock, and Class C common stock are identical, except with respect to voting. For the periods presented, the Company did not have any outstanding shares of Class C common stock. See "Note 16. Net Income (Loss) Per Share" for further details. Recent Accounting Pronouncements Yet to be Adopted In December 2025, the FASB issued ASU 2025-11, "Interim Reporting (Topic 270): Narrow-Scope Improvements." The amendments in this ASU clarify interim disclosure requirements and their applicability. This ASU results in a comprehensive list of interim disclosures that are required by GAAP. The ASU is effective for fiscal years beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. The Company is currently evaluating the impacts of adopting this guidance on its financial statement disclosures. In November 2024, the FASB issued ASU 2024-03, “Income Statement (Topic 220): Disaggregation of Income Statement Expenses,” which requires additional disclosures of certain amounts included in the expense captions presented on a company’s income statement as well as disclosures about selling expenses. The ASU is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, and early adoption is permitted. The Company is currently evaluating the impacts of adopting this guidance on its financial statement disclosures.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the Company's audited combined financial statements and the related notes thereto included in the Company's prospectus filed with the SEC on April 16, 2026 pursuant to Rule 424(b) of the Securities Act of 1933, as amended, in connection with the Company's IPO (the "Prospectus"). See "Note 1. Organization and Nature of Operations" for further details regarding the IPO. The December 31, 2025 balance sheet was derived from the Company's audited combined financial statements.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to the rules and regulations of the SEC. In the opinion of management, the unaudited condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, that are necessary for a fair presentation of the Company's condensed consolidated financial position, results of operations, and cash flows for the interim periods presented. Certain columns and rows may not add due to the use of rounded numbers. Quarterly results are not necessarily indicative of the results to be expected for the entire fiscal year.

Following the Reorganization, the financial statements are presented on a condensed consolidated basis and all intercompany accounts and transactions have been eliminated in consolidation. For the periods prior to the Reorganization, the financial statements are presented on a condensed combined basis and combine: (i) the consolidated financial statements of Arcline Engineered Polymer Topco, L.P., (ii) the consolidated financial statements of Hawkeye TopCo, L.P., (iii) the consolidated financial statements of

Share-Based Compensation

The Company accounts for share-based compensation in accordance with ASC 718, Compensation-Stock Compensation (“ASC 718”), including certain receivables due from related parties, where recourse exists to the equity interests of the executive.

Share-Based Compensation Arrangements

The Company grants restricted shares ("RSAs") and restricted stock units ("RSUs") as part of its stock-based compensation arrangements. RSAs represent issued common shares that are subject to forfeiture until vesting conditions are satisfied. RSUs represent the right to receive common shares upon satisfaction of vesting conditions. RSAs and RSUs may include service conditions, performance conditions, or market conditions.

The Company issued one share of convertible common stock to Arcline Arxis Advisory I, L.P. (“Arcline”) pursuant to the amended and restated advisory and consulting services agreement (the “Advisory and Consulting Agreement”), in exchange for advisory and consulting services. The award includes market conditions based on the price of the Company’s Class A common stock and a service condition tied to Arcline’s continued performance under the Advisory and Consulting Agreement. The award settles only in shares of the Company’s common stock or is forfeited for no consideration. See “Note 14. Equity” for the award’s conversion, redemption and forfeiture terms.

The RSAs, RSUs, and convertible common stock described above are equity-classified awards. The convertible common stock is further presented within permanent equity because none of its features require or permit cash settlement.

Share-Based Compensation Accounting

Equity-classified awards are measured at grant date fair value and are not subsequently remeasured. Compensation cost for equity-classified time-based awards is recognized over the requisite service period. Compensation cost for equity-classified performance-based awards is recognized when the applicable performance condition is considered probable of achievement. Compensation cost for equity-classified awards with market conditions is recognized on a straight-line basis over the requisite service period regardless of whether the market condition is achieved, provided the requisite service is rendered.

Liability-classified awards are initially measured at fair value on the grant date and subsequently remeasured at fair value at each reporting date until settlement. Compensation cost for liability-classified performance-based awards is recognized when the applicable performance condition is considered probable of achievement, for awards that are probable to vest. When the performance condition is event-based, the Company generally does not determine the performance condition is probable until such event occurs. Once vested, changes in fair value are recognized immediately in compensation expense until settlement.

The fair value of each award is estimated on the date of grant using an Option Pricing Methodology (“OPM”), under a risk-neutral framework. For awards containing market conditions, the OPM incorporates the relevant market condition, including any minimum stock price thresholds or multiples required for conversion, vesting, or redemption. Liability-classified awards are remeasured at fair value at each reporting date using the same valuation methodology. A number of assumptions are used to determine the fair value of awards granted, including expected term, dividend yield, volatility, and the risk-free interest rate. The Company classifies share-based compensation within Selling, general and administrative expenses. Award forfeitures are accounted for as incurred. Forfeitures occurring after an award's requisite service period are treated as post-vesting events and do not result in reversal of previously recognized compensation cost.

See “Note 15. Share-Based Arrangements” for further information, including the grant-date fair value, valuation assumptions and compensation expense recognized for the RSAs, RSUs, and convertible common stock, and “Note 16. Net Income (Loss) Per Share” for the convertible common stock’s treatment as a participating security.

Convertible-Related Tax Receivable Agreement

In connection with the convertible common stock, the Company entered into a Convertible-Related Tax Receivable Agreement ("TRA") pursuant to which it is contractually obligated to pay counterparties a specified percentage (85%) of the cash tax savings, if any, that the Company realizes from compensation deductions with respect to the convertible common stock award and related election under Section 83(b) of the Internal Revenue Code. The Company's obligations under its TRA represent contingent liabilities that are recognized in accordance with ASC 450, Contingencies ("ASC 450"), when payment is considered probable and the amount is reasonably estimable. Net cash tax savings are calculated by comparing the Company's actual income tax liability (determined using the actual applicable U.S. federal income tax rate and an assumed weighted-average state and local income tax rate) to the amount the Company would have been required to pay had it not been able to utilize any of the compensation deduction subject to the TRA. The TRA liability is recorded within Other long-term liabilities on the Condensed Consolidated Balance Sheets, with a corresponding charge to Selling, general and administrative expenses within the Condensed Consolidated Statements of Operations, at the point such recognition criteria are met. Because the timing and amount of future payments under the TRA depend on the Company's future taxable income, applicable tax rates, and the portion of tax benefits actually realized, actual amounts paid may differ materially from amounts accrued, and changes in estimates are recognized in the period identified within the Condensed Consolidated Statements of Operations. See “Note 14. Equity” for further information.

Net Income (Loss) Per Share

Basic net income (loss) per common share is computed by dividing net income (loss) attributable to the common shareholders by the weighted-average basic common shares outstanding. The Company utilizes the two-class method required for participating securities to compute net income (loss) per common share. Under the two-class method, net income for each period is allocated between the Company's common stockholders and the holders of the participating securities based on their respective rights to participate in dividends and undistributed earnings, assuming all such earnings for the period had been distributed.

The Company considers its convertible common stock to be a participating security. Prior to satisfaction of the applicable conversion conditions, the holder of the convertible common stock is entitled to receive dividends, if any, on an as-converted basis, but is not contractually required to participate in the Company's losses. See "Note 14. Equity" for further discussion of the terms of the convertible common stock.

The rights, including the liquidation and dividend rights, of the holders of Class A common stock, Class B common stock, and Class C common stock are identical, except with respect to voting. For the periods presented, the Company did not have any outstanding shares of Class C common stock. See "Note 16. Net Income (Loss) Per Share" for further details.

Recent Accounting Pronouncements Yet to be Adopted

In December 2025, the FASB issued ASU 2025-11, "Interim Reporting (Topic 270): Narrow-Scope Improvements." The amendments in this ASU clarify interim disclosure requirements and their applicability. This ASU results in a comprehensive list of interim disclosures that are required by GAAP. The ASU is effective for fiscal years beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. The Company is currently evaluating the impacts of adopting this guidance on its financial statement disclosures.

In November 2024, the FASB issued ASU 2024-03, “Income Statement (Topic 220): Disaggregation of Income Statement Expenses,” which requires additional disclosures of certain amounts included in the expense captions presented on a company’s income statement as well as disclosures about selling expenses. The ASU is effective on a prospective basis, with the option for retrospective application, for annual periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, and early adoption is permitted. The Company is currently evaluating the impacts of adopting this guidance on its financial statement disclosures.