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Seagate Technology Holdings plc

William D Mosley (CEO) sells STX shares

4STXFiled Nov 3, 2026, 4:59 PM ET· Period Nov 2, 2026

AI-generated summary

William D Mosley, CEO, Director, exercised 14,000 option shares at $46.23 for $647,220 and sold 23,280 ordinary shares at an average price of $602.44 for $14,024,765.59. Following these transactions, the insider directly holds 352,828.25 shares. The transactions were executed under a Rule 10b5-1 trading plan adopted on February 18, 2026.

Key facts

Insider
William D Mosley · CEO, Director

Rule 10b5-1 plan · adopted Feb 18, 2026

DateTransactionSharesPriceValueHeld afterOwnership
Nov 2, 2026M · exercise or conversion of a derivativeFootnotes F1+14,000$46.23$647,220.00376,108.25Direct
Nov 2, 2026S · open-market saleFootnotes F2−720$587.99$423,353.59375,388.25Direct
Nov 2, 2026S · open-market saleFootnotes F3−600$589.27$353,560.80374,788.25Direct
Nov 2, 2026S · open-market saleFootnotes F4−800$590.40$472,317.68373,988.25Direct
Nov 2, 2026S · open-market saleFootnotes F5−280$591.23$165,544.79373,708.25Direct
Nov 2, 2026S · open-market saleFootnotes F6−1,400$592.71$829,794.42372,308.25Direct
Nov 2, 2026S · open-market saleFootnotes F7−1,639$593.47$972,691.76370,669.25Direct
Nov 2, 2026S · open-market saleFootnotes F8−1,480$594.55$879,928.82369,189.25Direct
Nov 2, 2026S · open-market saleFootnotes F9−678$595.68$403,869.68368,511.25Direct
Nov 2, 2026S · open-market saleFootnotes F10−240$596.73$143,216.35368,271.25Direct
Nov 2, 2026S · open-market saleFootnotes F11−481$597.91$287,592.50367,790.25Direct
Nov 2, 2026S · open-market saleFootnotes F12−560$599.01$335,448.01367,230.25Direct
Nov 2, 2026S · open-market saleFootnotes F13−1,200$600.07$720,087.24366,030.25Direct
Nov 2, 2026S · open-market saleFootnotes F14−400$601.26$240,502.40365,630.25Direct
Nov 2, 2026S · open-market saleFootnotes F15−560$602.48$337,389.02365,070.25Direct
Nov 2, 2026S · open-market saleFootnotes F16−600$603.66$362,199.00364,470.25Direct
Nov 2, 2026S · open-market saleFootnotes F17−1,600$605.30$968,477.12362,870.25Direct
Nov 2, 2026S · open-market saleFootnotes F18−1,082$606.25$655,958.17361,788.25Direct
Nov 2, 2026S · open-market saleFootnotes F19−2,372$607.28$1,440,464.60359,416.25Direct
Nov 2, 2026S · open-market saleFootnotes F20−891$608.40$542,082.89358,525.25Direct
Nov 2, 2026S · open-market saleFootnotes F21−1,177$609.41$717,274.39357,348.25Direct
Nov 2, 2026S · open-market saleFootnotes F22−680$610.17$414,918.39356,668.25Direct
Nov 2, 2026S · open-market saleFootnotes F23−560$611.30$342,328.00356,108.25Direct
Nov 2, 2026S · open-market saleFootnotes F24−520$612.35$318,421.58355,588.25Direct
Nov 2, 2026S · open-market saleFootnotes F25−920$613.44$564,363.79354,668.25Direct
Nov 2, 2026S · open-market saleFootnotes F26−280$614.54$172,070.19354,388.25Direct
Nov 2, 2026S · open-market saleFootnotes F27−800$615.31$492,247.20353,588.25Direct
Nov 2, 2026S · open-market saleFootnotes F28−760$616.66$468,663.20352,828.25Direct
Nov 2, 2026M · exercise or conversion of a derivativeNQ OptionsFootnotes F29−14,000$0.00$0.0069,100Direct
Footnotes
  1. F1 All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.
  2. F2 These Ordinary Shares were sold in multiple trades at prices ranging from $587.62 to $588.44. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  3. F3 These Ordinary Shares were sold in multiple trades at prices ranging from $588.83 to $589.71. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  4. F4 These Ordinary Shares were sold in multiple trades at prices ranging from $589.91 to $590.89. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  5. F5 These Ordinary Shares were sold in multiple trades at prices ranging from $590.92 to $591.70. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  6. F6 These Ordinary Shares were sold in multiple trades at prices ranging from $592.05 to $593.00. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  7. F7 These Ordinary Shares were sold in multiple trades at prices ranging from $593.07 to $594.04. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  8. F8 These Ordinary Shares were sold in multiple trades at prices ranging from $594.15 to $595.14. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  9. F9 These Ordinary Shares were sold in multiple trades at prices ranging from $595.23 to $596.03. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  10. F10 These Ordinary Shares were sold in multiple trades at prices ranging from $596.33 to $597.27. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  11. F11 These Ordinary Shares were sold in multiple trades at prices ranging from $597.44 to $598.19. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  12. F12 These Ordinary Shares were sold in multiple trades at prices ranging from $598.52 to $599.42. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  13. F13 These Ordinary Shares were sold in multiple trades at prices ranging from $599.78 to $600.76. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  14. F14 These Ordinary Shares were sold in multiple trades at prices ranging from $600.98 to $601.65. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  15. F15 These Ordinary Shares were sold in multiple trades at prices ranging from $602.17 to $603.07. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  16. F16 These Ordinary Shares were sold in multiple trades at prices ranging from $603.24 to $604.23. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  17. F17 These Ordinary Shares were sold in multiple trades at prices ranging from $604.74 to $605.73. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  18. F18 These Ordinary Shares were sold in multiple trades at prices ranging from $605.79 to $606.74. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  19. F19 These Ordinary Shares were sold in multiple trades at prices ranging from $606.80 to $607.79. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  20. F20 These Ordinary Shares were sold in multiple trades at prices ranging from $607.80 to $608.79. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  21. F21 These Ordinary Shares were sold in multiple trades at prices ranging from $608.85 to $609.80. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  22. F22 These Ordinary Shares were sold in multiple trades at prices ranging from $609.85 to $610.42. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  23. F23 These Ordinary Shares were sold in multiple trades at prices ranging from $610.89 to $611.75. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  24. F24 These Ordinary Shares were sold in multiple trades at prices ranging from $611.92 to $612.88. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  25. F25 These Ordinary Shares were sold in multiple trades at prices ranging from $612.93 to $613.87. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  26. F26 These Ordinary Shares were sold in multiple trades at prices ranging from $614.00 to $614.93. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  27. F27 These Ordinary Shares were sold in multiple trades at prices ranging from $615.00 to $615.94. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  28. F28 These Ordinary Shares were sold in multiple trades at prices ranging from $616.15 to $617.14. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
  29. F29 Options granted to the Reporting Person are subject to a four year vesting schedule. One quarter of the option shares vested on September 9, 2021. The remaining option shares vest in equal monthly installments over the 36 months following September 9, 2021.

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