Form 4 for STX Seagate Technology
Accepted 2026-08-04 18:09:40 ET · period of report 2026-08-03 · accession 0001137789-26-000164 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MT | 2026-08-04 18:09 | 2026-08-03 | STX | MOSLEY WILLIAM D | CEO, Dir | S - Sale | $827.30 | -17.1K | 295.5K | -5% | -$14.13M |
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 | 2026-08-03 | S | D | 400 | $819.41 | 312,197 | D | — | — | (F1) All transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026. (F2) These Ordinary Shares were sold in multiple trades at prices ranging from $818.84 to $819.71. 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. |
| 2 | Common | Ordinary Shares | 2026-08-03 | S | D | 520 | $820.35 | 311,677 | D | — | — | (F3) These Ordinary Shares were sold in multiple trades at prices ranging from $819.89 to $820.88. 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. |
| 3 | Common | Ordinary Shares | 2026-08-03 | S | D | 575 | $821.46 | 311,102 | D | — | — | (F4) These Ordinary Shares were sold in multiple trades at prices ranging from $820.99 to $821.98. 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. |
| 4 | Common | Ordinary Shares | 2026-08-03 | S | D | 840 | $822.56 | 310,262 | D | — | — | (F5) These Ordinary Shares were sold in multiple trades at prices ranging from $822.01 to $822.97. 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. |
| 5 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,120 | $823.46 | 309,142 | D | — | — | (F6) These Ordinary Shares were sold in multiple trades at prices ranging from $823.085 to $824.07. 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. |
| 6 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,600 | $824.57 | 307,542 | D | — | — | (F7) These Ordinary Shares were sold in multiple trades at prices ranging from $824.15 to $825.11. 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. |
| 7 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,280 | $825.64 | 306,262 | D | — | — | (F8) These Ordinary Shares were sold in multiple trades at prices ranging from $825.16 to $826.15. 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. |
| 8 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,985 | $826.76 | 304,277 | D | — | — | (F9) These Ordinary Shares were sold in multiple trades at prices ranging from $826.19 to $827.18. 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. |
| 9 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,799 | $827.67 | 302,478 | D | — | — | (F10) These Ordinary Shares were sold in multiple trades at prices ranging from $827.20 to $828.19. 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. |
| 10 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,641 | $828.60 | 300,837 | D | — | — | (F11) These Ordinary Shares were sold in multiple trades at prices ranging from $828.22 to $829.16. 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. |
| 11 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,619 | $829.78 | 299,218 | D | — | — | (F12) These Ordinary Shares were sold in multiple trades at prices ranging from $829.33 to $830.31. 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. |
| 12 | Common | Ordinary Shares | 2026-08-03 | S | D | 1,960 | $830.83 | 297,258 | D | — | — | (F13) These Ordinary Shares were sold in multiple trades at prices ranging from $830.33 to $831.27. 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. |
| 13 | Common | Ordinary Shares | 2026-08-03 | S | D | 320 | $832.02 | 296,938 | D | — | — | (F14) These Ordinary Shares were sold in multiple trades at prices ranging from $831.43 to $832.31. 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. |
| 14 | Common | Ordinary Shares | 2026-08-03 | S | D | 400 | $832.73 | 296,538 | D | — | — | (F15) These Ordinary Shares were sold in multiple trades at prices ranging from $832.43 to $833.40. 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. |
| 15 | Common | Ordinary Shares | 2026-08-03 | S | D | 200 | $833.91 | 296,338 | D | — | — | (F16) These Ordinary Shares were sold in multiple trades at prices ranging from $833.43 to $834.36. 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. |
| 16 | Common | Ordinary Shares | 2026-08-03 | S | D | 181 | $835.06 | 296,157 | D | — | — | (F17) These Ordinary Shares were sold in multiple trades at prices ranging from $834.46 to $835.37. 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. |
| 17 | Common | Ordinary Shares | 2026-08-03 | S | D | 400 | $835.99 | 295,757 | D | — | — | (F18) These Ordinary Shares were sold in multiple trades at prices ranging from $835.55 to $836.52. 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. |
| 18 | Common | Ordinary Shares | 2026-08-03 | S | D | 160 | $836.77 | 295,597 | D | — | — | (F19) These Ordinary Shares were sold in multiple trades at prices ranging from $836.58 to $837.21. 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. |
| 19 | Common | Ordinary Shares | 2026-08-03 | S | D | 80 | $837.98 | 295,517 | D | — | — | (F20) These Ordinary Shares were sold in multiple trades at prices ranging from $837.97 to $837.99. 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. |