William D Mosley sold $17M of STX
CEO at Seagate Technology Holdings plc. 18,998 shares at an average of $914.67, traded Oct 1, 2026, filed Oct 2, 2026.
Score components
- +25RoleCEO
- +25Trade size$17.4M at market
- 0Share of holdings soldSold 4.8% of holdings
- +8Cluster2 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001137789-26-000261, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | MOption exercise Ordinary Shares10b5-1 | +14,000 | $46.23 | $647k | 392,108 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -360 | $898.10 | $323k | 391,748 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -517 | $900.46 | $466k | 391,231 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -440 | $901.49 | $397k | 390,791 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -384 | $902.55 | $347k | 390,407 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -696 | $903.36 | $629k | 389,711 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -480 | $904.33 | $434k | 389,231 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -480 | $905.38 | $435k | 388,751 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -601 | $906.42 | $545k | 388,150 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -560 | $907.43 | $508k | 387,590 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,027 | $908.58 | $933k | 386,563 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -307 | $909.84 | $279k | 386,256 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -840 | $910.69 | $765k | 385,416 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,146 | $912.04 | $1.0M | 384,270 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -696 | $913.08 | $636k | 383,574 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -904 | $913.94 | $826k | 382,670 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -960 | $915.01 | $878k | 381,710 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -480 | $916.10 | $440k | 381,230 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -400 | $917.22 | $367k | 380,830 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -920 | $918.49 | $845k | 379,910 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -840 | $919.56 | $772k | 379,070 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -630 | $920.62 | $580k | 378,440 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -930 | $921.64 | $857k | 377,510 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -800 | $922.66 | $738k | 376,710 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -760 | $923.78 | $702k | 375,950 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -640 | $924.72 | $592k | 375,310 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,080 | $925.88 | $1000k | 374,230 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -480 | $926.78 | $445k | 373,750 | 10 d ago |
| Oct 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -640 | $927.90 | $594k | 373,110 | 10 d ago |
| Oct 1, 2026 | MOption exercise NQ Optionsderivative10b5-1 | -14,000 | $0.00 | $0 | 83,100 | 10 d ago |
Related signals
Other insiders at Seagate Technology Holdings plc and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 38Weak | Seagate Technology Holdings plc | William D Mosley CEO | $10M 11,002 shares | -3% | |
| 30Weak | Seagate Technology Holdings plc | John Christopher Morris EVP & CTO | $8.2M 9,354 shares | -29% | |
| 55Moderate | Seagate Technology Holdings plc | William D Mosley CEO | $76M 97,889 shares | -21% | |
| 50Moderate | Seagate Technology Holdings plc | John Christopher Morris EVP & CTO | $12M 15,466 shares | -33% | |
| 57Moderate | Seagate Technology Holdings plc | Gianluca Romano EVP & CFO | $39M 49,984 shares | -41% | |
| 40Moderate | Seagate Technology Holdings plc | Ban Seng Teh EVP & Chief Commercial Officer | $41M 52,730 shares | -90% | |
| 50Moderate | Seagate Technology Holdings plc | William D Mosley CEO | $1.5M 1,870 shares | -1% | |
| 31Weak | Seagate Technology Holdings plc | John Christopher Morris EVP & CTO | $385k 493 shares | -3% | |
| 47Moderate | Seagate Technology Holdings plc | Gianluca Romano EVP & CFO | $38M 45,898 shares | -57% | |
| 32Weak | Seagate Technology Holdings plc | Gianluca Romano EVP & CFO | $4.7M 5,555 shares | -16% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.