William D Mosley sold $24M of STX
CEO at Seagate Technology Holdings plc. 30,000 shares at an average of $816.28, traded Sep 1, 2026, filed Sep 3, 2026.
Score components
- +25RoleCEO
- +25Trade size$24.5M at market
- 0Share of holdings soldSold 9.2% of holdings
- +15Cluster5 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 0001137789-26-000197, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 1, 2026 | MOption exercise Ordinary Shares10b5-1 | +14,000 | $46.23 | $647k | 325,168 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -357 | $804.61 | $287k | 324,811 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -160 | $805.55 | $129k | 324,651 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -160 | $807.19 | $129k | 324,491 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -960 | $808.62 | $776k | 323,531 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,160 | $809.55 | $939k | 322,371 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,105 | $810.78 | $896k | 321,266 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,578 | $811.73 | $1.3M | 319,688 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,200 | $812.55 | $975k | 318,488 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -2,040 | $813.74 | $1.7M | 316,448 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -2,878 | $814.75 | $2.3M | 313,570 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -4,555 | $815.75 | $3.7M | 309,015 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -4,287 | $816.75 | $3.5M | 304,728 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -2,080 | $817.71 | $1.7M | 302,648 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,040 | $818.78 | $852k | 301,608 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,320 | $819.84 | $1.1M | 300,288 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -920 | $820.89 | $755k | 299,368 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -480 | $822.05 | $395k | 298,888 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -600 | $822.89 | $494k | 298,288 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -1,240 | $824.05 | $1.0M | 297,048 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -600 | $824.93 | $495k | 296,448 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -580 | $826.00 | $479k | 295,868 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -340 | $826.86 | $281k | 295,528 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -120 | $827.90 | $99k | 295,408 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -80 | $829.10 | $66k | 295,328 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -80 | $830.36 | $66k | 295,248 | 39 d ago |
| Sep 1, 2026 | SOpen-market sale Ordinary Shares10b5-1 | -80 | $832.05 | $67k | 295,168 | 39 d ago |
| Sep 1, 2026 | MOption exercise NQ Optionsderivative10b5-1 | -14,000 | $0.00 | $0 | 97,100 | 39 d ago |
Related signals
Other insiders at Seagate Technology Holdings plc and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 23Weak | Seagate Technology Holdings plc | William D Mosley CEO | $17M 18,998 shares | -5% | |
| 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% |
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.