Description of Business and Basis of Presentation	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Description of Business York Space Systems Inc. is a leading, U.S.-based, national defense and commercial prime providing a comprehensive suite of mission-critical solutions for national security, government and commercial customers. The Company is one of the only space and defense primes with proprietary hardware and software capabilities designed to address its customers’ complex mission requirements across the critical elements of the entire space ecosystem throughout the entire mission lifecycle. All references in this Quarterly Report on Form 10-Q to the "Company,” “York,” “we,” “us” and “our” refer to York Space Systems Inc. and its consolidated subsidiaries. The Company is purpose built to address evolving national security space challenges and to adapt to the ongoing shift in the U.S. government’s mission needs and procurement processes, where economics, agility, rapid capabilities, and heritage drive customer decision making. The Company delivers mission critical solutions in a zero-tolerance for error environment where systems must work. The Company believes it is uniquely positioned to capture an outsized share of growth in its core markets. The Company provides customers a vertically integrated, full technology stack of solutions including design, production, integration, and operation of spacecraft with turnkey offerings to manage spacecraft and constellations throughout their entire mission lifecycle. The Company’s primary operating subsidiary, York Space Systems, LLC was founded in 2012 to create an innovative space technology mission prime, with a goal of meeting the evolving national security threats from space by providing mission-critical spacecraft at scale, faster, and at lower cost. Common Control Reorganization and Corporate Conversion Prior to January 28, 2026, the Company operated as a Delaware limited liability company under the name Yellowstone Midco Holdings II, LLC (“Midco II”). On January 28, 2026, prior to the effectiveness of the registration statement relating to the Company's initial public offering (“IPO”), Midco II converted into a Delaware corporation pursuant to a statutory conversion and changed its name to York Space Systems Inc. (the “Corporate Conversion”). Prior to October 3, 2025, the Company operated through Yellowstone Midco Holdings, LLC (“Midco I”). On October 3, 2025, all of the outstanding equity of Midco I, including both redeemable preferred and common units, was contributed to Midco II (the “Common Control Reorganization”) and, as a result, Midco I became a wholly owned subsidiary of Midco II. Immediately prior to the Common Control Reorganization, both Midco I and Midco II were wholly-owned subsidiaries of Yellowstone Ultimate Holdings, LP, (“Holdings”), a limited partnership that was controlled by investment funds managed by AE Industrial Partners, LP (“AE Industrial Partners”). At the time of the Corporate Conversion, all Class P units of Midco II (the "Class P Units") converted into 8,885,674 shares of our common stock which was calculated as an amount of shares equal to (i) the outstanding aggregate total preference amount of such Class P Unit, divided by (ii) the IPO price discounted by 20% and all outstanding common units of Midco II converted into an aggregate of 99,558,713 shares of common stock, including 2,269,473 shares of unrestricted common stock distributed in respect of vested Class B units (the “Incentive Units”) in Holdings and 2,147,313 shares of restricted stock distributed in respect of unvested Incentive Units, in each case, in connection with the Incentive Unit Distributions (as defined below). Immediately following the Corporate Conversion, Holdings distributed all common stock received upon conversion of the common units of Midco II to its limited partners and liquidated (the “Holdings Liquidation”). In connection with that action, vested and unvested Incentive Units (the “Incentive Unit Distributions”) were distributed. Certain shares of common stock distributed in respect of unvested Incentive Units are subject to time vesting and the recipients of such shares have entered into restricted stock agreements with us in connection with the receipt of such shares. As a result of the Holdings Liquidation, all partners of Holdings, including investment funds managed by AE Industrial Partners, became direct holders of the Company's common stock. The Common Control Reorganization is considered a reorganization of entities under common control. Amounts for the period from January 1, 2025 through March 31, 2025 presented in the unaudited condensed consolidated financial statements and accompanying notes herein represent the historical operations of Midco I. The amounts as of March 31, 2026 and for the period from January 1, 2026 through March 31, 2026 reflect the consolidated operations of the Company. Initial Public Offering On January 29, 2026, the Company's common stock began trading on the New York Stock Exchange (the "NYSE") under the ticker "YSS". In its IPO, the Company sold a total of 18.5 million shares of its common stock at a public offering price of $34.00 per share, for an aggregate offering price of $629.0 million. The Company received net proceeds of $583.4 million, net of $36.2 million of underwriting discounts and commissions and $9.4 million of other offering costs. The proceeds from the IPO will be used for general corporate and working capital purposes. Basis of Presentation The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include the Company’s accounts and the accounts of the Company’s wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”), certain information and footnote disclosures required by GAAP for annual financial statements have been condensed or omitted from these interim financial statements. Accordingly, these financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s 2025 Annual Report on Form 10-K, filed with the SEC on March 19, 2026. The results for the interim periods may not be indicative of results for the full year.

York Space Systems Inc. is a leading, U.S.-based, national defense and commercial prime providing a comprehensive suite of mission-critical solutions for national security, government and commercial customers. The Company is one of the only space and defense primes with proprietary hardware and software capabilities designed to address its customers’ complex mission requirements across the critical elements of the entire space ecosystem throughout the entire mission lifecycle. All references in this Quarterly Report on Form 10-Q to the "Company,” “York,” “we,” “us” and “our” refer to York Space Systems Inc. and its consolidated subsidiaries.

The Company is purpose built to address evolving national security space challenges and to adapt to the ongoing shift in the U.S. government’s mission needs and procurement processes, where economics, agility, rapid capabilities, and heritage drive customer decision making. The Company delivers mission critical solutions in a zero-tolerance for error environment where systems must work. The Company believes it is uniquely positioned to capture an outsized share of growth in its core markets. The Company provides customers a vertically integrated, full technology stack of solutions including design, production, integration, and operation of spacecraft with turnkey offerings to manage spacecraft and constellations throughout their entire mission lifecycle.

The Company’s primary operating subsidiary, York Space Systems, LLC was founded in 2012 to create an innovative space technology mission prime, with a goal of meeting the evolving national security threats from space by providing mission-critical spacecraft at scale, faster, and at lower cost.

Prior to January 28, 2026, the Company operated as a Delaware limited liability company under the name Yellowstone Midco Holdings II, LLC (“Midco II”). On January 28, 2026, prior to the effectiveness of the registration statement relating to the Company's initial public offering (“IPO”), Midco II converted into a Delaware corporation pursuant to a statutory conversion and changed its name to York Space Systems Inc. (the “Corporate Conversion”).

Prior to October 3, 2025, the Company operated through Yellowstone Midco Holdings, LLC (“Midco I”). On October 3, 2025, all of the outstanding equity of Midco I, including both redeemable preferred and common units, was contributed to Midco II (the “Common Control Reorganization”) and, as a result, Midco I became a wholly owned subsidiary of Midco II. Immediately prior to the Common Control Reorganization, both Midco I and Midco II were wholly-owned subsidiaries of Yellowstone Ultimate Holdings, LP, (“Holdings”), a limited partnership that was controlled by investment funds managed by AE Industrial Partners, LP (“AE Industrial Partners”).

At the time of the Corporate Conversion, all Class P units of Midco II (the "Class P Units") converted into 8,885,674 shares of our common stock which was calculated as an amount of shares equal to (i) the outstanding aggregate total preference amount of such Class P Unit, divided by (ii) the IPO price discounted by 20% and all outstanding common units of Midco II converted into an aggregate of 99,558,713 shares of common stock, including 2,269,473 shares of unrestricted common stock distributed in respect of vested Class B units (the “Incentive Units”) in Holdings and 2,147,313 shares of restricted stock distributed in respect of unvested Incentive Units, in each case, in connection with the Incentive Unit Distributions (as defined below).

Immediately following the Corporate Conversion, Holdings distributed all common stock received upon conversion of the common units of Midco II to its limited partners and liquidated (the “Holdings Liquidation”). In connection with that action, vested and unvested Incentive Units (the “Incentive Unit Distributions”) were distributed. Certain shares of common stock distributed in respect of unvested Incentive Units are subject to time vesting and the recipients of such shares have entered into restricted stock agreements with us in connection with the receipt of such shares. As a result of the Holdings Liquidation, all partners of Holdings, including investment funds managed by AE Industrial Partners, became direct holders of the Company's common stock.

The Common Control Reorganization is considered a reorganization of entities under common control. Amounts for the period from January 1, 2025 through March 31, 2025 presented in the unaudited condensed consolidated financial statements and accompanying notes herein represent the historical operations of Midco I. The amounts as of March 31, 2026 and for the period from January 1, 2026 through March 31, 2026 reflect the consolidated operations of the Company.

On January 29, 2026, the Company's common stock began trading on the New York Stock Exchange (the "NYSE") under the ticker "YSS". In its IPO, the Company sold a total of 18.5 million shares of its common stock at a public offering price of $34.00 per share, for an aggregate offering price of $629.0 million. The Company received net proceeds of $583.4 million, net of $36.2 million of underwriting discounts and commissions and $9.4 million of other offering costs. The proceeds from the IPO will be used for general corporate and working capital purposes.

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”). The unaudited condensed consolidated financial statements include the Company’s accounts and the accounts of the Company’s wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”), certain information and footnote disclosures required by GAAP for annual financial statements have been condensed or omitted from these interim financial statements. Accordingly, these financial statements should be read in conjunction with the audited consolidated financial statements and notes included in the Company’s 2025 Annual Report on Form 10-K, filed with the SEC on March 19, 2026. The results for the interim periods may not be indicative of results for the full year.