| 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 | 2025-11-05 | 0001388390 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | Ordinary Shares | Sale | -$382K | -1.5K | -0.31% | $254.44 | 484K | Nov 3, 2025 | Direct | F1, F2 |
| transaction | STX | Ordinary Shares | Sale | -$358K | -1.4K | -0.29% | $255.98 | 483K | Nov 3, 2025 | Direct | F3 |
| transaction | STX | Ordinary Shares | Sale | -$257K | -1K | -0.21% | $256.99 | 482K | Nov 3, 2025 | Direct | F4 |
| transaction | STX | Ordinary Shares | Sale | -$310K | -1.2K | -0.25% | $258.08 | 481K | Nov 3, 2025 | Direct | F5 |
| transaction | STX | Ordinary Shares | Sale | -$259K | -1K | -0.21% | $258.96 | 480K | Nov 3, 2025 | Direct | F6 |
| transaction | STX | Ordinary Shares | Sale | -$156K | -599 | -0.12% | $260.32 | 479K | Nov 3, 2025 | Direct | F7 |
| transaction | STX | Ordinary Shares | Sale | -$105K | -400 | -0.08% | $261.58 | 479K | Nov 3, 2025 | Direct | F8 |
| transaction | STX | Ordinary Shares | Sale | -$157K | -600 | -0.13% | $262.21 | 478K | Nov 3, 2025 | Direct | F9 |
| transaction | STX | Ordinary Shares | Sale | -$105K | -400 | -0.08% | $263.58 | 478K | Nov 3, 2025 | Direct | F10 |
| transaction | STX | Ordinary Shares | Sale | -$1.11M | -4.19K | -0.88% | $265.44 | 473K | Nov 3, 2025 | Direct | F11 |
| transaction | STX | Ordinary Shares | Sale | -$1.47M | -5.51K | -1.16% | $266.25 | 468K | Nov 3, 2025 | Direct | F12 |
| transaction | STX | Ordinary Shares | Sale | -$508K | -1.9K | -0.41% | $267.04 | 466K | Nov 3, 2025 | Direct | F13 |
| transaction | STX | Ordinary Shares | Sale | -$80.6K | -300 | -0.06% | $268.65 | 466K | Nov 3, 2025 | Direct | F14 |
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 $253.95 to $254.89. 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. |
| F3 | These Ordinary Shares were sold in multiple trades at prices ranging from $255.60 to $256.54. 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 $256.60 to $257.52. 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 $257.64 to $258.47. 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 $258.72 to $259.60. 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. |
| F7 | These Ordinary Shares were sold in multiple trades at prices ranging from $260.00 to $260.65. 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. |
| F8 | These Ordinary Shares were sold in multiple trades at prices ranging from $261.04 to $261.90. 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 $262.05 to $262.37. 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. |
| F10 | These Ordinary Shares were sold in multiple trades at prices ranging from $263.07 to $263.83. 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. |
| F11 | These Ordinary Shares were sold in multiple trades at prices ranging from $264.77 to $265.76. 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. |
| F12 | These Ordinary Shares were sold in multiple trades at prices ranging from $265.77 to $266.73. 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. |
| F13 | These Ordinary Shares were sold in multiple trades at prices ranging from $266.78 to $267.68. 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. |
| F14 | These Ordinary Shares were sold in multiple trades at prices ranging from $268.37 to $269.00. 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. |