| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Romano Gianluca | EVP & CFO | SEAGATE TECHNOLOGY HOLDINGS PLC, 47488 KATO ROAD, FREMONT | /s/ Louis J. Thorson, Attorney-in-Fact for Gianluca Romano | 14 Nov 2025 | 0001764650 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | Ordinary Shares | Options Exercise | $468,492 | +5,364 | +9.3% | $87.34 | 63,149 | 12 Nov 2025 | Direct | F1 |
| transaction | STX | Ordinary Shares | Options Exercise | $703,443 | +10,220 | +16% | $68.83 | 73,369 | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Options Exercise | $1,162,725 | +18,080 | +25% | $64.31 | 91,449 | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Options Exercise | $1,911,779 | +18,865 | +21% | $101.34 | 110,314 | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Sale | $712,929 | -2,549 | -2.3% | $279.69 | 107,765 | 12 Nov 2025 | Direct | F2 |
| transaction | STX | Ordinary Shares | Sale | $1,483,333 | -5,285 | -4.9% | $280.67 | 102,480 | 12 Nov 2025 | Direct | F3 |
| transaction | STX | Ordinary Shares | Sale | $1,607,867 | -5,712 | -5.6% | $281.49 | 96,768 | 12 Nov 2025 | Direct | F4 |
| transaction | STX | Ordinary Shares | Sale | $1,243,240 | -4,400 | -4.5% | $282.55 | 92,368 | 12 Nov 2025 | Direct | F5 |
| transaction | STX | Ordinary Shares | Sale | $1,937,722 | -6,836 | -7.4% | $283.46 | 85,532 | 12 Nov 2025 | Direct | F6 |
| transaction | STX | Ordinary Shares | Sale | $1,484,211 | -5,216 | -6.1% | $284.55 | 80,316 | 12 Nov 2025 | Direct | F7 |
| transaction | STX | Ordinary Shares | Sale | $1,226,114 | -4,294 | -5.3% | $285.54 | 76,022 | 12 Nov 2025 | Direct | F8 |
| transaction | STX | Ordinary Shares | Sale | $1,060,827 | -3,702 | -4.9% | $286.56 | 72,320 | 12 Nov 2025 | Direct | F9 |
| transaction | STX | Ordinary Shares | Sale | $1,407,982 | -4,893 | -6.8% | $287.75 | 67,427 | 12 Nov 2025 | Direct | F10 |
| transaction | STX | Ordinary Shares | Sale | $892,613 | -3,092 | -4.6% | $288.68 | 64,335 | 12 Nov 2025 | Direct | F11 |
| transaction | STX | Ordinary Shares | Sale | $783,378 | -2,703 | -4.2% | $289.82 | 61,632 | 12 Nov 2025 | Direct | F12 |
| transaction | STX | Ordinary Shares | Sale | $377,885 | -1,300 | -2.1% | $290.68 | 60,332 | 12 Nov 2025 | Direct | F13 |
| transaction | STX | Ordinary Shares | Sale | $379,206 | -1,300 | -2.2% | $291.70 | 59,032 | 12 Nov 2025 | Direct | F14 |
| transaction | STX | Ordinary Shares | Sale | $29,264 | -100 | -0.17% | $292.64 | 58,932 | 12 Nov 2025 | Direct | |
| transaction | STX | Ordinary Shares | Sale | $205,803 | -700 | -1.2% | $294.00 | 58,232 | 12 Nov 2025 | Direct | F15 |
| transaction | STX | Ordinary Shares | Sale | $442,348 | -1,500 | -2.6% | $294.90 | 56,732 | 12 Nov 2025 | Direct | F16 |
| transaction | STX | Ordinary Shares | Sale | $129,986 | -439 | -0.77% | $296.09 | 56,293 | 12 Nov 2025 | Direct | F17 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STX | NQ Options | Options Exercise | $0 | -5,364 | -100% | $0.000000 | 0 | 12 Nov 2025 | Ordinary Shares | 5,364 | $87.34 | Direct | F18 |
| transaction | STX | NQ Options | Options Exercise | $0 | -10,220 | -55% | $0.000000 | 8,517 | 12 Nov 2025 | Ordinary Shares | 10,220 | $68.83 | Direct | F19 |
| transaction | STX | NQ Options | Options Exercise | $0 | -18,080 | -35% | $0.000000 | 33,147 | 12 Nov 2025 | Ordinary Shares | 18,080 | $64.31 | Direct | F20 |
| transaction | STX | NQ Options | Options Exercise | $0 | -18,865 | -29% | $0.000000 | 45,815 | 12 Nov 2025 | Ordinary Shares | 18,865 | $101.34 | Direct | F21 |
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 August 1, 2025. |
| F2 | These Ordinary Shares were sold in multiple trades at prices ranging from $279.06 to $280.04. 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. |
| F3 | These Ordinary Shares were sold in multiple trades at prices ranging from $280.06 to $281.05. 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 $281.06 to $282.04. 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. |
| F5 | These Ordinary Shares were sold in multiple trades at prices ranging from $282.07 to $283.01. 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 $283.07 to $284.06. 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 $284.07 to $285.06. 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 $285.07 to $286.06. 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 $286.10 to $287.08. 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 $287.15 to $288.10. 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 $288.20 to $289.17. 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 $289.20 to $290.14. 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. |
| F13 | These Ordinary Shares were sold in multiple trades at prices ranging from $290.33 to $291.21. 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 $291.40 to $292.24. 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 $293.64 to $294.59. 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 $294.66 to $295.64. 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. |
| F17 | These Ordinary Shares were sold in multiple trades at prices ranging from $295.81 to $296.34. 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 | Options granted to the Reporting Person under the Seagate Technology plc 2022 Equity Incentive Plan (the "2022 Plan") are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2022 and the remaining options vested in equal monthly installments over the 36 months following September 9, 2022. |
| F19 | Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2023 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2023. |
| F20 | Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 11, 2024 and the remaining options vest in equal monthly installments over the 36 months following September 11, 2024. |
| F21 | Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, one-quarter of the options vested on September 9, 2025 and the remaining options vest in equal monthly installments over the 36 months following September 9, 2025. |