Based on data from the past 90 days ending January 01, 2026, Seagate Technology Holdings's three largest insider shareholders are Ceo William D Mosley (449.89K shares), Evp & Cfo Gianluca Romano (50.35K shares), Director Richard L Clemmer (29.70K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Holdings, L.P. Valueact | 13,437,070 | 22 Feb, 2022 | |
| William D Mosley | Ceo | 449,895 | 12 Dec, 2025 |
| Stephen J Luczo | 231,788 | 22 Oct, 2021 | |
| Gianluca Romano | Evp & Cfo | 50,351 | 12 Dec, 2025 |
| Edward J Zander | 41,357 | 24 Oct, 2023 | |
| Ravi Naik | Evp And Lyve Storage Services | 38,857 | 23 Mar, 2023 |
| Jeffrey D. Nygaard | Evp And Operations And Technology | 30,360 | 02 Feb, 2023 |
| Richard L Clemmer | 29,704 | 21 Oct, 2025 | |
| Katherine Schuelke | Svp And Clo & Corporate Secretary | 29,063 | 12 Dec, 2023 |
| Judy Bruner | 18,585 | 22 Oct, 2024 | |
| Jeffrey D. Fochtman | Svp And Business & Marketing | 14,736 | 14 Sep, 2022 |
| Dylan G. Haggart | 14,515 | 21 Oct, 2025 | |
| Mark Adams | 14,331 | 21 Oct, 2025 | |
| John Christopher Morris | Evp & Cto | 14,250 | 16 Dec, 2025 |
| Prat Bhatt | 13,869 | 21 Oct, 2025 | |
| Ban Seng Teh | Evp & Chief Commercial Officer | 13,693 | 12 Dec, 2025 |
| Michael R Cannon | 13,439 | 21 Oct, 2025 | |
| Stephanie Tilenius | 12,244 | 05 Nov, 2025 | |
| Shankar Arumugavelu | 7,626 | 12 Nov, 2025 | |
| Robert A Bruggeworth | 6,591 | 22 Oct, 2024 | |
| Yolanda Lee Conyers | 5,601 | 02 Dec, 2025 | |
| Kian Fatt Chong | Evp Global Operations | 1,258 | 12 Dec, 2025 |
| Jay L Geldmacher | 1,148 | 03 Nov, 2025 | |
| Thomas A Szlosek | 357 | 12 Nov, 2025 | |
| James Ci Lee | Evp & Clo | 257 | 12 Nov, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 15 Dec, 2025 | John Christopher Morris | Ordinary Shares | D | 113 | $291.89 | 14,250 | D | S |
| 11 Dec, 2025 | Kian Fatt Chong | Ordinary Shares | A | 678 | $0.00 | 1,258 | D | M |
| 11 Dec, 2025 | Ban Seng Teh | Ordinary Shares | A | 989 | $0.00 | 14,292 | D | M |
| 11 Dec, 2025 | John Christopher Morris | Ordinary Shares | A | 941 | $0.00 | 14,793 | D | M |
| 11 Dec, 2025 | Gianluca Romano | Ordinary Shares | A | 1,695 | $0.00 | 51,208 | D | M |
| 11 Dec, 2025 | William D Mosley | Ordinary Shares | A | 3,319 | $0.00 | 451,573 | D | M |
| 11 Dec, 2025 | William D Mosley | Ordinary Shares | D | 1,678 | $307.85 | 449,895 | D | F |
| 11 Dec, 2025 | Gianluca Romano | Ordinary Shares | D | 857 | $307.85 | 50,351 | D | F |
| 11 Dec, 2025 | Ban Seng Teh | Ordinary Shares | A | 532 | $68.83 | 14,824 | D | M |
| 11 Dec, 2025 | John Christopher Morris | Ordinary Shares | D | 430 | $307.85 | 14,363 | D | F |
| 11 Dec, 2025 | Ban Seng Teh | Ordinary Shares | A | 879 | $64.31 | 15,703 | D | M |
| 11 Dec, 2025 | Ban Seng Teh | Ordinary Shares | D | 2,010 | $295.90 | 13,693 | D | S |
| 09 Dec, 2025 | Gianluca Romano | Ordinary Shares | A | 958 | $0.00 | 49,249 | D | M |
| 09 Dec, 2025 | Ban Seng Teh | Ordinary Shares | A | 599 | $0.00 | 12,640 | D | M |
| 09 Dec, 2025 | John Christopher Morris | Ordinary Shares | A | 499 | $0.00 | 13,737 | D | M |
| 09 Dec, 2025 | William D Mosley | Ordinary Shares | A | 2,815 | $0.00 | 448,483 | D | M |
| 09 Dec, 2025 | Kian Fatt Chong | Ordinary Shares | A | 201 | $0.00 | 201 | D | M |
| 09 Dec, 2025 | Kian Fatt Chong | Ordinary Shares | A | 379 | $0.00 | 580 | D | M |
| 09 Dec, 2025 | Gianluca Romano | Ordinary Shares | D | 485 | $282.86 | 48,764 | D | F |
| 09 Dec, 2025 | Ban Seng Teh | Ordinary Shares | A | 663 | $0.00 | 13,303 | D | M |