YSS insider trading — York Space Systems Inc.
Over the last 90 days, insiders at York Space Systems Inc. (YSS) made 0 open-market purchases worth $0 and 8 open-market sales worth $18.41M, making them net sellers by $18.41M. The largest sale was by Blackrock Portfolio Management Llc (10% Owner), who sold 534,053 shares for $8.28M on Aug 4, 2026.
Updated Oct 16, 2026.
Recent YSS insider transactions
Every Form 4 filed by York Space Systems Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 7, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 200,170 | $10.99 | $2.20M | Form 4 |
| Aug 6, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 201,504 | $11.60 | $2.34M | Form 4 |
| Aug 5, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 127,946 | $13.65 | $1.75M | Form 4 |
| Aug 4, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 534,053 | $15.50 | $8.28M | Form 4 |
| Aug 3, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 13,754 | $15.03 | $207K | Form 4 |
| Jul 31, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 35,574 | $15.14 | $539K | Form 4 |
| Jul 30, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 140,823 | $15.18 | $2.14M | Form 4 |
| Jul 29, 2026 | Blackrock Portfolio Management Llc | 10% Owner | S · Sale | Indirect | 63,390 | $15.31 | $971K | Form 4 |
YSS insider trading FAQ
Are insiders buying YSS stock?
Not on the open market. In the last 90 days, York Space Systems Inc. insiders made no open-market purchases, and 8 open-market sales totaling $18.41M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading YSS?
Recent sellers: Blackrock Portfolio Management Llc.
Where does YSS insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.