MOSLEY WILLIAM D - Insider Non-Derivative Transactions at Seagate Technology Holdings plc (STX) - (SEC)
Updated on January 3, 2026.
According to recent SEC insider information filed on Dec 11, 2025, MOSLEY WILLIAM D's relationship to Seagate Technology Holdings plc (STX) is Director,Officer (CEO), and currently has 451,573 shares of Ordinary Shares.
The chart below shows the number of shares owned, and the table shows the recent insider transactions.
You can see similar information for other STX insiders.
Related Topics: SEC Topic List.
Data Source: SEC.
MOSLEY WILLIAM D - Insider Non-Derivative Transactions of STX Ordinary Shares
MOSLEY WILLIAM D - Insider Non-Derivative Transactions at STX
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| Date | Transaction | No. of Shares | Price Per Share | Shares Owned After Transactions |
|---|---|---|---|---|
| Dec 12, 2025 | F -- (Ordinary Shares) | 1678 | 307.85 | 449895 |
| Dec 12, 2025 | M -- (Ordinary Shares) | 3319 | 0 | 451573 |
| Dec 10, 2025 | F -- (Ordinary Shares) | 1423 | 282.86 | 447060 |
| Dec 10, 2025 | F -- (Ordinary Shares) | 1221 | 282.86 | 448254 |
| Dec 10, 2025 | M -- (Ordinary Shares) | 2815 | 0 | 448483 |
| Dec 10, 2025 | M -- (Ordinary Shares) | 2415 | 0 | 449475 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 100 | 274.89 | 445668 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 800 | 273.04 | 445768 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 5894 | 272.24 | 446568 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 5718 | 271.19 | 452462 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 5338 | 270.29 | 458180 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 650 | 269.43 | 463518 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 407 | 268.58 | 464168 |
| Dec 2, 2025 | Sell -- (Ordinary Shares) | 1093 | 267.27 | 464575 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 300 | 268.65 | 465668 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 1901 | 267.04 | 465968 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 5506 | 266.25 | 467869 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 4194 | 265.44 | 473375 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 400 | 263.58 | 477569 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 600 | 262.21 | 477969 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 400 | 261.58 | 478569 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 599 | 260.32 | 478969 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 1000 | 258.96 | 479568 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 1200 | 258.08 | 480568 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 1000 | 256.99 | 481768 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 1400 | 255.98 | 482768 |
| Nov 4, 2025 | Sell -- (Ordinary Shares) | 1500 | 254.44 | 484168 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1000 | 257.83 | 485668 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 3885 | 256.88 | 486668 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1011 | 255.69 | 490553 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 500 | 254.65 | 491564 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1900 | 253.76 | 492064 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 800 | 252.45 | 493964 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 700 | 252.03 | 494764 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1004 | 250.43 | 495464 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1500 | 249.42 | 496468 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 800 | 248.3 | 497968 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 700 | 247.2 | 498768 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1400 | 245.94 | 499468 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 1400 | 245.24 | 500868 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 500 | 243.43 | 502268 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 400 | 241.5 | 502768 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 500 | 240.02 | 503168 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 300 | 238.8 | 503668 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 500 | 237.83 | 503968 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 400 | 236.38 | 504468 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 200 | 235.24 | 504868 |
| Oct 2, 2025 | Sell -- (Ordinary Shares) | 600 | 234.09 | 505068 |
| Sep 15, 2025 | F -- (Ordinary Shares) | 32931 | 195.99 | 505668 |
| Sep 15, 2025 | M -- (Ordinary Shares) | 65170 | 0 | 538599 |
| Sep 12, 2025 | F -- (Ordinary Shares) | 1678 | 196.81 | 473429 |
| Sep 12, 2025 | M -- (Ordinary Shares) | 3319 | 0 | 475107 |
| Sep 10, 2025 | F -- (Ordinary Shares) | 4552 | 191.59 | 463367 |
| Sep 10, 2025 | F -- (Ordinary Shares) | 1423 | 191.59 | 464759 |
| Sep 10, 2025 | M -- (Ordinary Shares) | 2815 | 0 | 466182 |
| Sep 10, 2025 | M -- (Ordinary Shares) | 9007 | 0 | 467919 |
| Sep 10, 2025 | F -- (Ordinary Shares) | 4883 | 191.59 | 469538 |
| Sep 10, 2025 | F -- (Ordinary Shares) | 2300 | 191.59 | 471788 |
| Sep 10, 2025 | M -- (Ordinary Shares) | 4550 | 0 | 474088 |
| Sep 10, 2025 | M -- (Ordinary Shares) | 9662 | 0 | 474421 |
| Sep 3, 2025 | Sell -- (Ordinary Shares) | 7000 | 170.19 | 458912 |
| Sep 3, 2025 | Sell -- (Ordinary Shares) | 5715 | 169.06 | 465912 |
| Sep 3, 2025 | Sell -- (Ordinary Shares) | 5843 | 168.29 | 471627 |
| Sep 3, 2025 | Sell -- (Ordinary Shares) | 400 | 166.6 | 477470 |
| Sep 3, 2025 | Sell -- (Ordinary Shares) | 342 | 165.67 | 477870 |
| Sep 3, 2025 | Sell -- (Ordinary Shares) | 700 | 164.8 | 478212 |
| Aug 2, 2025 | Sell -- (Ordinary Shares) | 500 | 156.42 | 478912 |
| Aug 2, 2025 | Sell -- (Ordinary Shares) | 1346 | 155.84 | 479412 |
| Aug 2, 2025 | Sell -- (Ordinary Shares) | 4825 | 154.67 | 480758 |
| Aug 2, 2025 | Sell -- (Ordinary Shares) | 8311 | 153.67 | 485583 |
| Aug 2, 2025 | Sell -- (Ordinary Shares) | 2544 | 152.68 | 493894 |
| Aug 2, 2025 | Sell -- (Ordinary Shares) | 2474 | 151.63 | 496438 |
| Jul 2, 2025 | Sell -- (Ordinary Shares) | 10966 | 145.26 | 498710 |
| Jul 2, 2025 | Sell -- (Ordinary Shares) | 5262 | 144.29 | 509676 |
| Jul 2, 2025 | Sell -- (Ordinary Shares) | 3772 | 143.41 | 514938 |
| Jun 12, 2025 | F -- (Ordinary Shares) | 1677 | 126.49 | 518710 |
| Jun 12, 2025 | M -- (Ordinary Shares) | 3318 | 0 | 520387 |
| Jun 10, 2025 | Sell -- (Ordinary Shares) | 54347 | 130.19 | 515677 |
| Jun 10, 2025 | F -- (Ordinary Shares) | 1422 | 130.17 | 517069 |
| Jun 10, 2025 | M -- (Ordinary Shares) | 2814 | 0 | 518491 |
| Jun 10, 2025 | M -- (Ordinary Shares) | 54347 | 54.78 | 570024 |
| Jun 4, 2025 | Sell -- (Ordinary Shares) | 50000 | 120.27 | 515677 |
| Jun 4, 2025 | M -- (Ordinary Shares) | 50000 | 54.78 | 515677 |
| Jun 4, 2025 | M -- (Ordinary Shares) | 50000 | 54.78 | 565677 |
| Jun 3, 2025 | Sell -- (Ordinary Shares) | 7586 | 119.4 | 515677 |
| Jun 3, 2025 | Sell -- (Ordinary Shares) | 9715 | 118.73 | 523263 |
| Jun 3, 2025 | Sell -- (Ordinary Shares) | 2699 | 117.94 | 532978 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 400 | 111.06 | 485677 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 51000 | 110 | 486077 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 400 | 111.06 | 535677 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 51000 | 110 | 536077 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 5195 | 108.94 | 537077 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 7777 | 108.08 | 542272 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 3828 | 107.43 | 550049 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 1800 | 106 | 553877 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 5195 | 108.94 | 587077 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 7777 | 108.08 | 592272 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 3828 | 107.43 | 600049 |
| May 23, 2025 | Sell -- (Ordinary Shares) | 1800 | 106 | 603877 |
| May 23, 2025 | M -- (Ordinary Shares) | 50000 | 54.78 | 605677 |
| Apr 2, 2025 | Sell -- (Ordinary Shares) | 13200 | 84.77 | 555677 |
| Apr 2, 2025 | Sell -- (Ordinary Shares) | 6800 | 84.14 | 568877 |
| Mar 12, 2025 | F -- (Ordinary Shares) | 1677 | 86.97 | 575677 |
| Mar 12, 2025 | M -- (Ordinary Shares) | 3318 | 0 | 577354 |
| Mar 10, 2025 | F -- (Ordinary Shares) | 1422 | 88 | 574036 |
| Mar 10, 2025 | M -- (Ordinary Shares) | 2814 | 0 | 575458 |
| Mar 4, 2025 | Sell -- (Ordinary Shares) | 2456 | 103.24 | 572644 |
| Mar 4, 2025 | Sell -- (Ordinary Shares) | 6002 | 102.58 | 575100 |
| Mar 4, 2025 | Sell -- (Ordinary Shares) | 5261 | 101.42 | 581102 |
| Mar 4, 2025 | Sell -- (Ordinary Shares) | 6281 | 100.08 | 586363 |
| Feb 21, 2025 | F -- (Ordinary Shares) | 4755 | 102.64 | 592644 |
| Feb 21, 2025 | M -- (Ordinary Shares) | 11808 | 0 | 597399 |
| Feb 4, 2025 | Sell -- (Ordinary Shares) | 3417 | 95.16 | 585591 |
| Feb 4, 2025 | Sell -- (Ordinary Shares) | 7385 | 94.22 | 589008 |
| Feb 4, 2025 | Sell -- (Ordinary Shares) | 9198 | 93.68 | 596393 |
| Jan 3, 2025 | Sell -- (Ordinary Shares) | 7796 | 87.23 | 605530 |
| Jan 3, 2025 | Sell -- (Ordinary Shares) | 12204 | 86.28 | 613326 |
| Dec 12, 2024 | F -- (Ordinary Shares) | 1677 | 98.39 | 625530 |
| Dec 12, 2024 | M -- (Ordinary Shares) | 3318 | 0 | 627207 |
| Dec 10, 2024 | F -- (Ordinary Shares) | 1422 | 98.97 | 623889 |
| Dec 10, 2024 | M -- (Ordinary Shares) | 2814 | 0 | 625311 |
| Dec 3, 2024 | Sell -- (Ordinary Shares) | 1042 | 104.88 | 622497 |
| Dec 3, 2024 | Sell -- (Ordinary Shares) | 4806 | 101.83 | 623539 |
| Dec 3, 2024 | Sell -- (Ordinary Shares) | 12852 | 103.13 | 628345 |
| Dec 3, 2024 | Sell -- (Ordinary Shares) | 1300 | 101.91 | 641197 |
| Nov 2, 2024 | Sell -- (Ordinary Shares) | 100 | 100.93 | 642497 |
| Nov 2, 2024 | Sell -- (Ordinary Shares) | 6800 | 100.23 | 642597 |
| Nov 2, 2024 | Sell -- (Ordinary Shares) | 13100 | 99.16 | 649397 |
| Oct 20, 2024 | F -- (Ordinary Shares) | 14179 | 112.12 | 662497 |
| Oct 20, 2024 | M -- (Ordinary Shares) | 28060 | 0 | 676676 |
| Oct 2, 2024 | Sell -- (Ordinary Shares) | 100 | 108.66 | 648616 |
| Oct 2, 2024 | Sell -- (Ordinary Shares) | 12829 | 107.9 | 648716 |
| Oct 2, 2024 | Sell -- (Ordinary Shares) | 7071 | 107.28 | 661545 |
| Sep 27, 2024 | Sell -- (Ordinary Shares) | 141785 | 110.18 | 668616 |
| Sep 27, 2024 | M -- (Ordinary Shares) | 141785 | 50.29 | 810401 |
| Sep 12, 2024 | F -- (Ordinary Shares) | 6708 | 102.53 | 668616 |
| Sep 12, 2024 | M -- (Ordinary Shares) | 13275 | 0 | 675324 |
| Sep 10, 2024 | F -- (Ordinary Shares) | 6572 | 101.34 | 640704 |
| Sep 10, 2024 | M -- (Ordinary Shares) | 13006 | 0 | 647276 |
| Sep 10, 2024 | F -- (Ordinary Shares) | 15832 | 101.34 | 656202 |
| Sep 10, 2024 | F -- (Ordinary Shares) | 4551 | 101.34 | 660657 |
| Sep 10, 2024 | F -- (Ordinary Shares) | 1422 | 101.34 | 662049 |
| Sep 10, 2024 | M -- (Ordinary Shares) | 2814 | 0 | 663471 |
| Sep 10, 2024 | M -- (Ordinary Shares) | 9006 | 0 | 665208 |
| Sep 10, 2024 | M -- (Ordinary Shares) | 31330 | 0 | 672034 |
| Sep 4, 2024 | Sell -- (Ordinary Shares) | 1700 | 98.7 | 634270 |
| Sep 4, 2024 | Sell -- (Ordinary Shares) | 4646 | 97.8 | 635970 |
| Sep 4, 2024 | Sell -- (Ordinary Shares) | 13654 | 96.78 | 640616 |
| Aug 8, 2024 | Sell -- (Ordinary Shares) | 766 | 95.22 | 654270 |
| Aug 8, 2024 | Sell -- (Ordinary Shares) | 4591 | 94.42 | 655036 |
| Aug 8, 2024 | Sell -- (Ordinary Shares) | 6426 | 93.6 | 659627 |
| Aug 8, 2024 | Sell -- (Ordinary Shares) | 8217 | 92.65 | 666053 |
| Jun 10, 2024 | F -- (Ordinary Shares) | 1061 | 96.11 | 673945 |
| Jun 10, 2024 | M -- (Ordinary Shares) | 2814 | 0 | 675006 |
| Mar 10, 2024 | Sell -- (Ordinary Shares) | 1000 | 92.69 | 672192 |
| Mar 10, 2024 | M -- (Ordinary Shares) | 2814 | 0 | 673192 |
| Dec 10, 2023 | Sell -- (Ordinary Shares) | 1396 | 80.59 | 670378 |
| Dec 10, 2023 | M -- (Ordinary Shares) | 2814 | 0 | 671774 |
| Dec 9, 2023 | Sell -- (Ordinary Shares) | 153188 | 80.21 | 668960 |
| Dec 9, 2023 | M -- (Ordinary Shares) | 153188 | 30.95 | 822148 |
| Sep 16, 2023 | F -- (Ordinary Shares) | 36505 | 63.75 | 668960 |
| Sep 16, 2023 | Acquisition -- (Ordinary Shares) | 73627 | 0 | 705465 |
| Sep 10, 2023 | F -- (Ordinary Shares) | 4466 | 65.37 | 620849 |
| Sep 10, 2023 | M -- (Ordinary Shares) | 9006 | 0 | 625315 |
| Sep 10, 2023 | F -- (Ordinary Shares) | 5226 | 65.37 | 626163 |
| Sep 10, 2023 | M -- (Ordinary Shares) | 10540 | 0 | 631389 |
| Sep 10, 2023 | F -- (Ordinary Shares) | 5582 | 65.37 | 631838 |
| Sep 10, 2023 | M -- (Ordinary Shares) | 11257 | 0 | 637420 |
| Sep 2, 2023 | Sell -- (Ordinary Shares) | 5605 | 74.01 | 616309 |
| Sep 2, 2023 | Sell -- (Ordinary Shares) | 62857 | 73.45 | 621914 |
| Sep 2, 2023 | Sell -- (Ordinary Shares) | 13791 | 72.29 | 684771 |
| Sep 2, 2023 | Sell -- (Ordinary Shares) | 16607 | 71.4 | 698562 |
| Sep 2, 2023 | M -- (Ordinary Shares) | 98860 | 36.09 | 715169 |
| Sep 1, 2023 | Sell -- (Ordinary Shares) | 40397 | 70.81 | 616309 |
| Sep 1, 2023 | Sell -- (Ordinary Shares) | 100000 | 70.08 | 616309 |
| Sep 1, 2023 | Sell -- (Ordinary Shares) | 53990 | 70.35 | 656706 |
| Sep 1, 2023 | Sell -- (Ordinary Shares) | 5613 | 69.34 | 710696 |
| Sep 1, 2023 | M -- (Ordinary Shares) | 100000 | 30.95 | 716309 |
| Sep 1, 2023 | M -- (Ordinary Shares) | 100000 | 36.09 | 716309 |
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