| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MOSLEY WILLIAM D | CEO, Director | SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT | /s/ Louis J. Thorson, Attorney-in-Fact for William D. Mosley | 03 Mar 2026 | 0001388390 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | Ordinary Shares | Sale | $328,486 | -874 | -0.21% | $375.84 | 415,023 | 02 Mar 2026 | Direct | F1, F2 |
| transaction | STX | Ordinary Shares | Sale | $122,800 | -326 | -0.08% | $376.69 | 414,697 | 02 Mar 2026 | Direct | F3 |
| transaction | STX | Ordinary Shares | Sale | $302,359 | -800 | -0.19% | $377.95 | 413,897 | 02 Mar 2026 | Direct | F4 |
| transaction | STX | Ordinary Shares | Sale | $659,862 | -1,740 | -0.42% | $379.23 | 412,157 | 02 Mar 2026 | Direct | F5 |
| transaction | STX | Ordinary Shares | Sale | $479,331 | -1,260 | -0.31% | $380.42 | 410,897 | 02 Mar 2026 | Direct | F6 |
| transaction | STX | Ordinary Shares | Sale | $305,210 | -800 | -0.19% | $381.51 | 410,097 | 02 Mar 2026 | Direct | F7 |
| transaction | STX | Ordinary Shares | Sale | $1,338,437 | -3,500 | -0.85% | $382.41 | 406,597 | 02 Mar 2026 | Direct | F8 |
| transaction | STX | Ordinary Shares | Sale | $1,035,423 | -2,700 | -0.66% | $383.49 | 403,897 | 02 Mar 2026 | Direct | F9 |
| transaction | STX | Ordinary Shares | Sale | $1,038,175 | -2,700 | -0.67% | $384.51 | 401,197 | 02 Mar 2026 | Direct | F10 |
| transaction | STX | Ordinary Shares | Sale | $462,467 | -1,200 | -0.3% | $385.39 | 399,997 | 02 Mar 2026 | Direct | F11 |
| transaction | STX | Ordinary Shares | Sale | $116,263 | -300 | -0.08% | $387.54 | 399,697 | 02 Mar 2026 | Direct | F12 |
| transaction | STX | Ordinary Shares | Sale | $117,005 | -300 | -0.08% | $390.02 | 399,397 | 02 Mar 2026 | Direct | F13 |
| transaction | STX | Ordinary Shares | Sale | $196,044 | -500 | -0.13% | $392.09 | 398,897 | 02 Mar 2026 | Direct | F14 |
| transaction | STX | Ordinary Shares | Sale | $196,666 | -500 | -0.13% | $393.33 | 398,397 | 02 Mar 2026 | Direct | F15 |
| transaction | STX | Ordinary Shares | Sale | $236,851 | -600 | -0.15% | $394.75 | 397,797 | 02 Mar 2026 | Direct | F16 |
| transaction | STX | Ordinary Shares | Sale | $317,132 | -800 | -0.2% | $396.42 | 396,997 | 02 Mar 2026 | Direct | F17 |
| transaction | STX | Ordinary Shares | Sale | $79,521 | -200 | -0.05% | $397.60 | 396,797 | 02 Mar 2026 | Direct | F18 |
| transaction | STX | Ordinary Shares | Sale | $40,027 | -100 | -0.03% | $400.27 | 396,697 | 02 Mar 2026 | Direct | |
| transaction | STX | Ordinary Shares | Sale | $120,627 | -300 | -0.08% | $402.09 | 396,397 | 02 Mar 2026 | Direct | F19 |
| transaction | STX | Ordinary Shares | Sale | $40,305 | -100 | -0.03% | $403.05 | 396,297 | 02 Mar 2026 | Direct | |
| transaction | STX | Ordinary Shares | Sale | $121,505 | -300 | -0.08% | $405.02 | 395,997 | 02 Mar 2026 | Direct | F20 |
| transaction | STX | Ordinary Shares | Sale | $40,766 | -100 | -0.03% | $407.66 | 395,897 | 02 Mar 2026 | Direct |
Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
| Id | Content |
|---|---|
| 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 20, 2025. |
| F2 | These Ordinary Shares were sold in multiple trades at prices ranging from $375.25 to $376.13. 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. |
| F3 | These Ordinary Shares were sold in multiple trades at prices ranging from $376.37 to $376.91. 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. |
| F4 | These Ordinary Shares were sold in multiple trades at prices ranging from $377.45 to $378.37. 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. |
| F5 | These Ordinary Shares were sold in multiple trades at prices ranging from $378.69 to $379.68. 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. |
| F6 | These Ordinary Shares were sold in multiple trades at prices ranging from $379.89 to $380.83. 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. |
| F7 | These Ordinary Shares were sold in multiple trades at prices ranging from $380.95 to $381.92. 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. |
| F8 | These Ordinary Shares were sold in multiple trades at prices ranging from $381.99 to $382.98. 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. |
| F9 | These Ordinary Shares were sold in multiple trades at prices ranging from $383.05 to $384.00. 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. |
| F10 | These Ordinary Shares were sold in multiple trades at prices ranging from $384.05 to $384.93. 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. |
| F11 | These Ordinary Shares were sold in multiple trades at prices ranging from $385.11 to $386.02. 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. |
| F12 | These Ordinary Shares were sold in multiple trades at prices ranging from $387.35 to $387.64. 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. |
| F13 | These Ordinary Shares were sold in multiple trades at prices ranging from $389.61 to $390.49. 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. |
| F14 | These Ordinary Shares were sold in multiple trades at prices ranging from $391.68 to $392.58. 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. |
| F15 | These Ordinary Shares were sold in multiple trades at prices ranging from $392.95 to $393.73. 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. |
| F16 | These Ordinary Shares were sold in multiple trades at prices ranging from $394.26 to $395.19. 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. |
| F17 | These Ordinary Shares were sold in multiple trades at prices ranging from $395.77 to $396.74. 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. |
| F18 | These Ordinary Shares were sold in multiple trades at prices ranging from $397.51 to $397.70. 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. |
| F19 | These Ordinary Shares were sold in multiple trades at prices ranging from $401.89 to $402.43. 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. |
| F20 | These Ordinary Shares were sold in multiple trades at prices ranging from $404.64 to $405.36. 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. |