SEC Form 4 · accession 0001104659-26-070964
York Space Systems Inc. · YSS
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
A later amendment supersedes this filing — read the amendment. The figures below are kept as originally reported (version chain, not an overwrite).
Period of report
Jun 4, 2026
Accepted (ET)
Jun 5, 2026 · 4:05 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0002086587
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock, par value $0.0001 per shareF2,F3 | Jun 4, 2026 | A | 287,789 | $34.00 | A | 30,483,877 | I | See Footnotes |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Consists of 287,789 shares of common stock issued to AE Industrial HorizonX Venture Fund II, LP, pursuant to that certain Agreement and Plan of Reorganization (the "Merger Agreement"), dated as of May 15, 2026, by and among York Space Systems Inc. (the "Company"), Solestial, Inc. and the other parties thereto.
- F2Consists of 2,832,488 shares held by AE Industrial Partners Fund II, LP, 1,813,066 shares held by AE Industrial Partners Fund II-A, LP, 6,842 shares held by AE Industrial Partners Fund II-B, LP, 10,908,489 shares held by AE Industrial Partners Fund III, LP, 3,258,380 shares held by AE Industrial Partners Fund III-A, LP, 566,675 shares held by AE Aerospace Opportunities Fund, 8,757,636 shares held by AE Co-Investment Partners Fund III-Y, LP (CIV), 1,475,343 shares held by AE Co-Investment Partners Fund III Y-2, LP, 23,916 shares held by AE Industrial PSO Equity Partners, LP, 553,253 shares held by AE Industrial Partners PBCI Aggregator, LP and 287,789 shares held by AE Industrial HorizonX Venture Fund II, LP.
- F3Each entity described above is ultimately controlled by AeroEquity GP, LLC. AeroEquity GP, LLC is controlled by its managing members, Michael Greene and David Rowe. Messrs. Greene and Rowe make all voting and investment decisions with respect to the securities held by AE Industrial Partners. Each of the entities and individuals named above disclaims beneficial ownership of the securities held by AE Industrial Partners, except to the extent of its pecuniary interest therein.
Remarks
Exhibit 24.1 - Power of Attorney