SEC Form 4 · accession 0001137789-26-000252
Seagate Technology Holdings plc · STX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
William D Mosley
Officer — CEO · Director
Period of report
Sep 14, 2026
Accepted (ET)
Sep 16, 2026 · 4:10 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001137789
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Ordinary SharesF1 | Sep 14, 2026 | M | 177,000 | $0.00 | A | 475,998 | D | |
| Ordinary SharesF2 | Sep 15, 2026 | S | 97,889 | $772.1432 | D | 378,108 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Performance-Based Restricted Share UnitsF3 | $0.00 | Sep 14, 2026 | M | 177,000 | D | — | — | Ordinary Shares | 177,000 | 0 | D |
Explanation of responses
- F1Represents Ordinary Shares issued upon the vesting and settlement of Performance Share Units granted on September 11, 2023, following certification by the Compensation and People Committee of the achievement of the applicable performance conditions.
- F2Represents sales made pursuant to Issuer mandated sell-to-cover solely to satisfy tax withholding obligations.
- F3Performance Share Units granted on September 11, 2023 vested and were settled in Ordinary Shares upon certification of the applicable performance conditions by the Compensation and People Committee.