CIK 0002086587 · <br>Emerging growth company
York Space Systems Inc.
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- YSS
- Exchange
- NYSE
- Industry
- Guided Missiles & Space Vehicles & Parts
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- Phone
- 720-537-2655
- Business address
- 6060 S WILLOW DR., GREENWOOD VILLAGE, CO, 80111
- Former names
- Yellowstone Midco Holdings II, LLC
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $0
- in 0 filings
Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-08-07 | BlackRock Portfolio Management LLC 10% owner | Sale | −200,170 | $10.99 | $2.2M | 16,517,115 |
| 2026-08-06 | BlackRock Portfolio Management LLC 10% owner | Sale | −201,504 | $11.60 | $2.3M | 16,717,285 |
| 2026-08-05 | BlackRock Portfolio Management LLC 10% owner | Sale | −116,162 | $13.49 | $1.6M | 16,930,673 |
| 2026-08-05 | BlackRock Portfolio Management LLC 10% owner | Sale | −11,884 | $15.28 | $182K | 16,918,789 |
| 2026-08-05 | BlackRock Portfolio Management LLC 10% owner | Sale | −116,162 | $13.49 | $1.6M | 16,943,178 |
| 2026-08-05 | BlackRock Portfolio Management LLC 10% owner | Sale | −11,784 | $15.28 | $180K | 16,931,394 |
| 2026-08-04 | BlackRock Portfolio Management LLC 10% owner | Sale | −78,082 | $15.02 | $1.2M | 17,515,311 |
| 2026-08-04 | BlackRock Portfolio Management LLC 10% owner | Sale | −468,476 | $15.58 | $7.3M | 17,046,835 |
| 2026-08-04 | BlackRock Portfolio Management LLC 10% owner | Sale | −77,743 | $15.02 | $1.2M | 17,515,650 |
| 2026-08-04 | BlackRock Portfolio Management LLC 10% owner | Sale | −456,310 | $15.58 | $7.1M | 17,059,340 |
| 2026-08-03 | BlackRock Portfolio Management LLC 10% owner | Sale | −13,754 | $15.03 | $207K | 17,593,393 |
| 2026-07-31 | BlackRock Portfolio Management LLC 10% owner | Sale | −35,574 | $15.14 | $539K | 17,607,147 |
| 2026-07-30 | BlackRock Portfolio Management LLC 10% owner | Sale | −140,823 | $15.18 | $2.1M | 17,642,721 |
| 2026-07-29 | BlackRock Portfolio Management LLC 10% owner | Sale | −63,390 | $15.31 | $971K | 17,783,544 |
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