Form 4 for STX Seagate Technology
Accepted 2026-09-16 16:10:22 ET · period of report 2026-09-14 · accession 0001137789-26-000252 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-09-16 16:10 | 2026-09-14 | STX | MOSLEY WILLIAM D | CEO, Dir | M - OptEx | $0.00 | +177.0K | 476.0K | +59% | $0 |
| D | 2026-09-16 16:10 | 2026-09-15 | STX | MOSLEY WILLIAM D | CEO, Dir | S - Sale+OE | $772.14 | -97.9K | 378.1K | -21% | -$75.58M |
| D | 2026-09-16 16:10 | 2026-09-14 | STX | MOSLEY WILLIAM D | CEO, Dir | M - OptEx | $0.00 | -177.0K | 0 | -100% | $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 | 2026-09-14 | M | A | 177,000 | $0.00 | 475,997.50 | D | — | — | (F1) Represents 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. |
| 2 | Common | Ordinary Shares | 2026-09-15 | S | D | 97,889.25 | $772.14 | 378,108.25 | D | — | — | (F2) Represents sales made pursuant to Issuer mandated sell-to-cover solely to satisfy tax withholding obligations. |
| 3 | Derivative | Performance-Based Restricted Share Units | 2026-09-14 | M | D | 177,000 | $0.00 | 0 | D | $0.00 · — to — | 177,000 Ordinary Shares | (F3) Performance 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. (F3) Performance 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. |