York Space Systems Inc.
YSS- Exchange
- NYSE
- Industry
- Guided Missiles & Space Vehicles & Parts
- SEC CIK
- 0002086587
No open-market purchases or sales by York Space Systems Inc. insiders were filed in the last 90 days; 161 institutions reported holding it in 13F filings for Q2 2026, worth $1.60B in total; Soros Fund Management is the only superinvestor holding it.
Holders of 5% or more of YSS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of York Space Systems Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Aeroequity GP, LLC | 13G/A | 23.96%32.9M shares | +0.68 ppfrom 23.28% | May 15, 20262 filings | Aug 14, 2026 | SEC |
| BlackRock Portfolio Management LLC | 13G | 14.00%17.8M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| Wallinger Dirk | 13G | 8.60%11.2M shares | New | May 15, 20261 filing | May 15, 2026 | SEC |
| BlackRock, Inc. | 13G | 5.40%7.44M shares | New | Oct 27, 20261 filing | Oct 27, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
5 Schedule 13D and 13G filings on York Space Systems Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Oct 27, 20265:25 PM ET | BlackRock, Inc. | 13G | 5.40%7.44M shares | New | Sep 30, 2026 | SEC |
| Aug 14, 20264:05 PM ET | Aeroequity GP, LLCand 2 others | 13G/A | 23.96%32.9M shares | +0.68 ppfrom 23.28% | Jun 30, 2026 | SEC |
| May 15, 20264:05 PM ET | Wallinger Dirk | 13G | 8.60%11.2M shares | New | Mar 31, 2026 | SEC |
| May 15, 20268:45 AM ET | Aeroequity GP, LLCand 2 others | 13G | 23.28%30.2M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20264:06 PM ET | BlackRock Portfolio Management LLC | 13G | 14.00%17.8M shares | New | Mar 31, 2026 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell York Space Systems Inc. shares.
No Form 144 notices for York Space Systems Inc. are on file.