YSS
York Space Systems Inc. · Manufacturing · Market cap $1.1B
Insiders sold $27.1M net in the last 90 days ·1 seller, 0 buyers· latest Form 4 filed Aug 10, 2026
Insider Buying
$25.7M
reported purchases (SEC code P)
Insider Selling
$27.1M
reported sales (SEC code S)
Unique Insiders
3
in the rolling window
Latest filing
Aug 10, 2026
BlackRock Portfolio Management LLC
York Space Systems Inc. (YSS) has 22 SEC Form 4 filings (33 transaction rows) in the rolling window, disclosed by 3 distinct insiders. Most recent filing: Aug 10, 2026.
Inside the rolling window, 3 insiders at York Space Systems Inc. reported 3 open-market purchases totaling $25.7M and 8 open-market sales totaling $27.1M. The most active filer is 10% Owner BlackRock Portfolio Management LLC with 9 filings. Insiders have net sold $27.1M over the trailing 6 months. The most recent open-market filing is a sale of 201,504 shares by 10% Owner BlackRock Portfolio Management LLC, dated Aug 6, 2026, worth $2.3M.
- Industry:Aerospace & Defense
- CEO:Dirk Wallinger
- Employees:710
- HQ:Greenwood Village, CO, US
- IPO:2026-01-29
| Source | |||||||
|---|---|---|---|---|---|---|---|
| 10% Owner | Sale | 201,504 | $2.3M | Aug 10 | -24.8% | SEC ↗ | |
| 10% Owner | Sale | 200,170 | $2.2M | Aug 10 | -24.8% | SEC ↗ | |
| 10% Owner | Sale | 1,080,611 | $16.7M | Aug 10 | -24.8% | SEC ↗ | |
| 10% Owner | Sale | 139,830 | $1.9M | Aug 10 | -24.8% | SEC ↗ | |
| 10% Owner | Sale | 35,574 | $539K | Aug 4 | — | SEC ↗ | |
| 10% Owner | Sale | 13,754 | $207K | Aug 4 | — | SEC ↗ | |
BlackRock Portfolio Management LLCFirst in 6 months | 10% Owner | Sale | 63,390 | $971K | Jul 31 | — | SEC ↗ |
BlackRock Portfolio Management LLCFirst in 6 months | 10% Owner | Sale | 140,823 | $2.1M | Jul 31 | — | SEC ↗ |
Erwin Tami A.First filing | Director | Purchase | 2,941 | $100K | Feb 3 | — | SEC ↗ |
Letarte TylerFirst filing | Director | Purchase | 1,470 | $50K | Feb 3 | — | SEC ↗ |
BlackRock Portfolio Management LLCFirst filing | 10% Owner | Purchase | 752,500 | $25.6M | Feb 3 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does YSS have?
York Space Systems Inc. (YSS) has 22 SEC Form 4 filings (33 transaction rows) in the rolling 365-day window, disclosed by 3 distinct insiders. Most recent filing: Aug 10, 2026.
When was the most recent SEC Form 4 filing for YSS?
The most recent Form 4 filing for YSS on Tracefour is dated Aug 10, 2026.
Who is the most active insider at YSS?
The most active SEC Form 4 filer at YSS in the rolling window is 10% Owner BlackRock Portfolio Management LLC, with 9 filings.
What is the net insider flow at YSS over the last 6 months?
Over the trailing 180 days, insiders at YSS have net sold $27.1M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at YSS in the current window?
Inside the rolling window, insiders at YSS bought $25.7M and sold $27.1M based on SEC Form 4 filings.
Can I get alerts for YSS insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at York Space Systems Inc. (YSS). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
York Space Systems Inc. is in the Manufacturing sector.