Form 4 for STX Seagate Technology
Accepted 2026-08-24 17:10:53 ET · period of report 2026-08-20 · accession 0001137789-26-000182 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-08-24 17:10 | 2026-08-20 | STX | MOSLEY WILLIAM D | CEO, Dir | M - OptEx | $0.00 | +33.8K | 314.6K | +12% | $0 |
| DM | 2026-08-24 17:10 | 2026-08-21 | STX | MOSLEY WILLIAM D | CEO, Dir | S - Sale+OE | $849.35 | -18.1K | 311.2K | -6% | -$15.41M |
| DM | 2026-08-24 17:10 | 2026-08-20 | STX | MOSLEY WILLIAM D | CEO, Dir | M - OptEx | $0.00 | -33.8K | 0 | -100% | $0 |
| DM | 2026-08-24 17:10 | 2026-08-20 | STX | MOSLEY WILLIAM D | CEO, Dir | A - Grant | $0.00 | +44.0K | 31.9K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Ordinary Shares | 2026-08-20 | M | A | 6,404 | $0.00 | 301,921 | D | — | — | |
| 2 | Common | Ordinary Shares | 2026-08-21 | S | D | 3,437.75 | $849.35 | 298,483.25 | D | — | — | |
| 3 | Common | Ordinary Shares | 2026-08-20 | M | A | 21,065 | $0.00 | 319,548.25 | D | — | — | |
| 4 | Common | Ordinary Shares | 2026-08-21 | S | D | 11,308 | $849.35 | 308,240.25 | D | — | — | |
| 5 | Common | Ordinary Shares | 2026-08-20 | M | A | 6,320 | $0.00 | 314,560.25 | D | — | — | |
| 6 | Common | Ordinary Shares | 2026-08-21 | S | D | 3,392.75 | $849.35 | 311,167.50 | D | — | — | |
| 7 | Derivative | Restricted Share Unit | 2026-08-20 | M | D | 6,404 | $0.00 | 19,213 | D | $0.00 · — to — | 6,404 Ordinary Shares | (F1) Consists of a grant of Restricted Share Unit (RSU) awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan") subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on August 20, 2026 and then in equal quarterly installments thereafter. (F1) Consists of a grant of Restricted Share Unit (RSU) awarded to the Reporting Person under the Seagate Technology Holdings plc 2022 Equity Incentive Plan (the "2022 Plan") subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on August 20, 2026 and then in equal quarterly installments thereafter. |
| 8 | Derivative | Restricted Share Unit | 2026-08-20 | M | D | 6,320 | $0.00 | 0 | D | $0.00 · — to — | 6,320 Ordinary Shares | (F2) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. 100% of such RSUs vested on the first anniversary of the grant date, August 20, 2026. (F2) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. 100% of such RSUs vested on the first anniversary of the grant date, August 20, 2026. |
| 9 | Derivative | Restricted Share Unit | 2026-08-20 | M | D | 21,065 | $0.00 | 0 | D | $0.00 · — to — | 21,065 Ordinary Shares | (F2) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. 100% of such RSUs vested on the first anniversary of the grant date, August 20, 2026. (F2) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. 100% of such RSUs vested on the first anniversary of the grant date, August 20, 2026. |
| 10 | Derivative | Restricted Share Unit | 2026-08-20 | A | A | 5,309 | $0.00 | 5,309 | D | $0.00 · — to — | 5,309 Ordinary Shares | (F3) Consists of a grant of RSUs awarded to the Reporting Person under the Plan subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on August 20, 2027 and then in equal quarterly installments thereafter. (F3) Consists of a grant of RSUs awarded to the Reporting Person under the Plan subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, such RSUs vest as to one-quarter of the shares on August 20, 2027 and then in equal quarterly installments thereafter. |
| 11 | Derivative | Restricted Share Unit | 2026-08-20 | A | A | 5,280 | $0.00 | 5,280 | D | $0.00 · — to — | 5,280 Ordinary Shares | (F4) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 100% of such RSUs will vest on the first anniversary of the grant date, August 20, 2027. (F4) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 100% of such RSUs will vest on the first anniversary of the grant date, August 20, 2027. |
| 12 | Derivative | Restricted Share Unit | 2026-08-20 | A | A | 1,584 | $0.00 | 1,584 | D | $0.00 · — to — | 1,584 Ordinary Shares | (F4) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 100% of such RSUs will vest on the first anniversary of the grant date, August 20, 2027. (F4) Consists of a grant of RSUs awarded to the Reporting Person under the Plan. Subject to the Reporting Person's continuous employment, 100% of such RSUs will vest on the first anniversary of the grant date, August 20, 2027. |
| 13 | Derivative | NQ Stock Option | 2026-08-20 | A | A | 31,856 | $0.00 | 31,856 | D | $850.24 · — to 2033-08-20 | 31,856 Ordinary Shares | (F5) Consists of Options awarded to the Reporting Person under the Plan subject to a four-year vesting schedule. Subject to the Reporting Person's continuous employment, such Options vest as to one-quarter of the shares on August 20, 2027 and the remaining portion shall vest in equal monthly installments over the following three years for a total vesting period of four years. |