X0202 SCHEDULE 13G 0001880792 XXXXXXXX LIVE Common Stock, par value $0.0001 03/31/2026 0002086587 York Space Systems Inc. 987084100 6060 S. Willow Drive Greenwood Village CO 80111 Rule 13d-1(d) AeroEquity GP, LLC b DE 0.00 30196088.00 0.00 30196088.00 30196088.00 N 23.28 OO Calculated based on 129,694,458 shares of common stock, par value $0.0001 per share ("Common Stock") of York Space System Inc. (the "Issuer") outstanding as reported on the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026. Michael Robert Greene b X1 0.00 30196088.00 0.00 30196088.00 30196088.00 N 23.28 IN Calculated based on 129,694,458 shares of Common Stock of the Issuer outstanding as reported on the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026. David H. Rowe b X1 0.00 30196088.00 0.00 30196088.00 30196088.00 N 23.28 IN Calculated based on 129,694,458 shares of Common Stock of the Issuer outstanding as reported on the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026. York Space Systems Inc. 6060 S. Willow Drive, Greenwood Village, CO 80111 This statement is filed by the entities listed below, all of whom together are referred to herein as the "Reporting Persons": (i) AE Industrial Partners Fund II, LP; (ii) AE Industrial Partners Fund II-A, LP; (iii) AE Industrial Partners Fund II-B, LP; (iv) AE Industrial Partners Fund III, LP; (v) AE Industrial Partners Fund III-A, LP (vi) AE Industrial Partners Aerospace Opportunities, LP (vii) AE Co-Investment Partners Fund III-Y, LP (viii) AE Co-Investment Partners Fund III Y-2, LP (ix) AE Industrial PSO Equity Partners, LP; (x) AE Industrial Partners PBCI Aggregator, LP (together with each of the foregoing, the "AE Holders"); (xi) AeroEquity GP, LLC ("AeroEquity"); (xii) Michael Robert Greene; and (xiii) David H. Rowe. 6700 Broken Sound Pkwy NW, Boca Raton, FL 33487 See response to Item 4 on the cover page. Y See response to Item 9 on the cover page. See response to Item 11 on the cover page. See response to Item 5 on the cover page. See response to Item 6 on the cover page. See response to Item 7 on the cover page. See response to Item 8 on the cover page. Each of the AE Holders is ultimately controlled by AeroEquity. AeroEquity is controlled by its managing members, Michael Robert Greene and David H. Rowe. Messrs. Greene and Rowe make all voting and investment decisions with respect to the securities held by AE Industrial Partners. AeroEquity and Messrs. Greene and Rowe may therefore be deemed to have voting and dispositive power over 30,196,088.00 shares of Common Stock directly held by the AE Holders. The reported amounts do not include 11,168,593 shares of Common Stock beneficially owned by Dirk Wallinger. Pursuant to the Director Nomination Agreement, dated as of January 28, 2026, by and among the Issuer and the stockholders party thereto, the Reporting Persons may be deemed to be a member of a "group" within the meaning of Rule 13d-5(b) and beneficially own securities beneficially owned by Dirk Wallinger. The filing of this Statement shall not be deemed an admission of membership in any such "group" or of beneficial ownership of the securities beneficially owned by Mr. Wallinger, for purposes of Section 13(d) or 13(g) or for any other purpose. The responses to Items 5 through 9 of the cover page to this Statement do not reflect any securities beneficially owned by Mr. Wallinger. The reported amounts also do not include an aggregate of 64,178,201 shares of Common Stock beneficially owned by parties to voting agreements (the "Voting Agreement"), by and among the Issuer and the stockholders party thereto. Pursuant to the Voting Agreements, the Reporting Persons may be deemed to be a member of a "group" within the meaning of Rule 13d-5(b) and beneficially own securities beneficially owned by the parties to the Voting Agreements. The filing of this Statement shall not be deemed an admission of membership in any such "group" or of beneficial ownership of the securities beneficially owned by such parties, for purposes of Section 13(d) or 13(g) or for any other purpose. The responses to Items 5 through 9 of the cover page to this Statement do not reflect any securities beneficially owned by parties subject to the Voting Agreements. As a result of the foregoing, the Reporting Persons may be deemed to beneficially own an aggregate of 105,542,882 shares of Common Stock, or 81.38% of shares of Common Stock outstanding. Y Y Y Y Y Y Exhibit 1 Joint Filing Agreement, dated as of May 15, 2026. AeroEquity GP, LLC /s/ Michael Robert Greene 05/15/2026 Michael Robert Greene /s/ Michael Robert Greene 05/15/2026 David H. Rowe /s/ David H. Rowe 05/15/2026