| 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 Feb 2026 | 0001388390 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | Ordinary Shares | Sale | $40,110 | -100 | -0.02% | $401.10 | 429,956 | 02 Feb 2026 | Direct | F1, F2 |
| transaction | STX | Ordinary Shares | Sale | $40,347 | -100 | -0.02% | $403.47 | 429,856 | 02 Feb 2026 | Direct | |
| transaction | STX | Ordinary Shares | Sale | $41,190 | -100 | -0.02% | $411.90 | 429,756 | 02 Feb 2026 | Direct | |
| transaction | STX | Ordinary Shares | Sale | $83,954 | -200 | -0.05% | $419.77 | 429,556 | 02 Feb 2026 | Direct | F3 |
| transaction | STX | Ordinary Shares | Sale | $84,233 | -200 | -0.05% | $421.16 | 429,356 | 02 Feb 2026 | Direct | F4 |
| transaction | STX | Ordinary Shares | Sale | $169,205 | -400 | -0.09% | $423.01 | 428,956 | 02 Feb 2026 | Direct | F5 |
| transaction | STX | Ordinary Shares | Sale | $371,434 | -875 | -0.2% | $424.50 | 428,081 | 02 Feb 2026 | Direct | F6 |
| transaction | STX | Ordinary Shares | Sale | $416,324 | -978 | -0.23% | $425.69 | 427,103 | 02 Feb 2026 | Direct | F7 |
| transaction | STX | Ordinary Shares | Sale | $811,423 | -1,900 | -0.44% | $427.06 | 425,203 | 02 Feb 2026 | Direct | F8 |
| transaction | STX | Ordinary Shares | Sale | $977,114 | -2,283 | -0.54% | $428.00 | 422,920 | 02 Feb 2026 | Direct | F9 |
| transaction | STX | Ordinary Shares | Sale | $671,098 | -1,564 | -0.37% | $429.09 | 421,356 | 02 Feb 2026 | Direct | F10 |
| transaction | STX | Ordinary Shares | Sale | $774,256 | -1,800 | -0.43% | $430.14 | 419,556 | 02 Feb 2026 | Direct | F11 |
| transaction | STX | Ordinary Shares | Sale | $1,606,492 | -3,725 | -0.89% | $431.27 | 415,831 | 02 Feb 2026 | Direct | F12 |
| transaction | STX | Ordinary Shares | Sale | $1,674,730 | -3,875 | -0.93% | $432.19 | 411,956 | 02 Feb 2026 | Direct | F13 |
| transaction | STX | Ordinary Shares | Sale | $693,157 | -1,600 | -0.39% | $433.22 | 410,356 | 02 Feb 2026 | Direct | F14 |
| transaction | STX | Ordinary Shares | Sale | $130,292 | -300 | -0.07% | $434.31 | 410,056 | 02 Feb 2026 | Direct | F15 |
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 | Includes 161 Ordinary Shares purchased by Reporting Person on January 31, 2026 under the Issuer's Employee Stock Purchase Plan. Such acquisition is exempt from reporting pursuant to Rule 16b-3 under the Securities Exchange Act of 1934. |
| F3 | These Ordinary Shares were sold in multiple trades at prices ranging from $419.29 to $420.25. 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 $420.96 to $421.37. 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 $422.88 to $423.23. 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. |
| F6 | These Ordinary Shares were sold in multiple trades at prices ranging from $424.11 to $424.81. 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 $425.26 to $426.20. 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 $426.60 to $427.55. 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 $427.60 to $428.56. 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 $428.61 to $429.60. 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 $429.63 to $430.58. 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. |
| F12 | These Ordinary Shares were sold in multiple trades at prices ranging from $430.70 to $431.67. 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 $431.74 to $432.67. 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 $432.93 to $433.89. 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. |
| F15 | These Ordinary Shares were sold in multiple trades at prices ranging from $433.96 to $434.48. 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. |