Form 4 for STX Seagate Technology
Accepted 2026-06-02 17:16:44 ET · period of report 2026-06-01 · accession 0001137789-26-000116 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-06-02 17:16 | 2026-06-01 | STX | MOSLEY WILLIAM D | CEO, Dir | M - OptEx | $46.23 | +14.0K | 353.6K | +4% | +$647.2K |
| DMT | 2026-06-02 17:16 | 2026-06-01 | STX | MOSLEY WILLIAM D | CEO, Dir | S - Sale+OE | $900.21 | -16.2K | 337.4K | -5% | -$14.60M |
| DT | 2026-06-02 17:16 | 2026-06-01 | STX | MOSLEY WILLIAM D | CEO, Dir | M - OptEx | $0.00 | -14.0K | 139.1K | -9% | $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 | 2026-06-01 | M | A | 14,000 | $46.23 | 353,591 | 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. |
| 2 | Common | Ordinary Shares | 2026-06-01 | S | D | 600 | $884.62 | 352,991 | D | — | — | (F2) These Ordinary Shares were sold in multiple trades at prices ranging from $884.23 to $885.22. 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 | 2026-06-01 | S | D | 360 | $885.67 | 352,631 | D | — | — | (F3) These Ordinary Shares were sold in multiple trades at prices ranging from $885.23 to $886.21. 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. |
| 4 | Common | Ordinary Shares | 2026-06-01 | S | D | 360 | $886.72 | 352,271 | D | — | — | (F4) These Ordinary Shares were sold in multiple trades at prices ranging from $886.37 to $887.03. 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 | 2026-06-01 | S | D | 240 | $887.72 | 352,031 | D | — | — | (F5) These Ordinary Shares were sold in multiple trades at prices ranging from $887.37 to $888.15. 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. |
| 6 | Common | Ordinary Shares | 2026-06-01 | S | D | 163 | $888.89 | 351,868 | D | — | — | (F6) These Ordinary Shares were sold in multiple trades at prices ranging from $888.42 to $889.34. 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 | 2026-06-01 | S | D | 640 | $889.94 | 351,228 | D | — | — | (F7) These Ordinary Shares were sold in multiple trades at prices ranging from $889.50 to $890.36. 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. |
| 8 | Common | Ordinary Shares | 2026-06-01 | S | D | 1,160 | $890.98 | 350,068 | D | — | — | (F8) These Ordinary Shares were sold in multiple trades at prices ranging from $890.53 to $891.50. 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 | 2026-06-01 | S | D | 760 | $892.06 | 349,308 | D | — | — | (F9) These Ordinary Shares were sold in multiple trades at prices ranging from $891.71 to $892.52. 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. |
| 10 | Common | Ordinary Shares | 2026-06-01 | S | D | 208 | $893.00 | 349,100 | D | — | — | (F10) These Ordinary Shares were sold in multiple trades at prices ranging from $892.71 to $893.17. 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 | 2026-06-01 | S | D | 480 | $894.20 | 348,620 | D | — | — | (F11) These Ordinary Shares were sold in multiple trades at prices ranging from $893.78 to $894.62. 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 | 2026-06-01 | S | D | 481 | $895.45 | 348,139 | D | — | — | (F12) These Ordinary Shares were sold in multiple trades at prices ranging from $894.83 to $895.80. 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 | 2026-06-01 | S | D | 320 | $896.43 | 347,819 | D | — | — | (F13) These Ordinary Shares were sold in multiple trades at prices ranging from $895.92 to $896.72. 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 | 2026-06-01 | S | D | 280 | $897.43 | 347,539 | D | — | — | (F14) These Ordinary Shares were sold in multiple trades at prices ranging from $896.93 to $897.85. 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 | 2026-06-01 | S | D | 813 | $898.41 | 346,726 | D | — | — | (F15) These Ordinary Shares were sold in multiple trades at prices ranging from $898.01 to $899.00 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 | 2026-06-01 | S | D | 160 | $899.27 | 346,566 | D | — | — | (F16) These Ordinary Shares were sold in multiple trades at prices ranging from $899.03 to $899.95. 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 | 2026-06-01 | S | D | 320 | $900.54 | 346,246 | D | — | — | (F17) These Ordinary Shares were sold in multiple trades at prices ranging from $900.11 to $900.97. 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. |
| 18 | Common | Ordinary Shares | 2026-06-01 | S | D | 860 | $901.56 | 345,386 | D | — | — | (F18) These Ordinary Shares were sold in multiple trades at prices ranging from $901.23 to $902.19. 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. |
| 19 | Common | Ordinary Shares | 2026-06-01 | S | D | 839 | $902.62 | 344,547 | D | — | — | (F19) These Ordinary Shares were sold in multiple trades at prices ranging from $902.26 to $903.20. 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. |
| 20 | Common | Ordinary Shares | 2026-06-01 | S | D | 779 | $903.78 | 343,768 | D | — | — | (F20) These Ordinary Shares were sold in multiple trades at prices ranging from $903.27 to $904.14. 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. |
| 21 | Common | Ordinary Shares | 2026-06-01 | S | D | 879 | $904.70 | 342,889 | D | — | — | (F21) These Ordinary Shares were sold in multiple trades at prices ranging from $904.29 to $905.24. 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. |
| 22 | Common | Ordinary Shares | 2026-06-01 | S | D | 740 | $905.76 | 342,149 | D | — | — | (F22) These Ordinary Shares were sold in multiple trades at prices ranging from $905.32 to $906.31. 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. |
| 23 | Common | Ordinary Shares | 2026-06-01 | S | D | 1,285 | $906.79 | 340,864 | D | — | — | (F23) These Ordinary Shares were sold in multiple trades at prices ranging from $906.32 to $907.18. 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. |
| 24 | Common | Ordinary Shares | 2026-06-01 | S | D | 760 | $907.75 | 340,104 | D | — | — | (F24) These Ordinary Shares were sold in multiple trades at prices ranging from $907.35 to $908.31. 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. |
| 25 | Common | Ordinary Shares | 2026-06-01 | S | D | 853 | $909.18 | 339,251 | D | — | — | (F25) These Ordinary Shares were sold in multiple trades at prices ranging from $908.50 to $909.47. 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. |
| 26 | Common | Ordinary Shares | 2026-06-01 | S | D | 600 | $910.15 | 338,651 | D | — | — | (F26) These Ordinary Shares were sold in multiple trades at prices ranging from $909.68 to $910.41. 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. |
| 27 | Common | Ordinary Shares | 2026-06-01 | S | D | 480 | $911.03 | 338,171 | D | — | — | (F27) These Ordinary Shares were sold in multiple trades at prices ranging from $910.68 to $911.40. 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. |
| 28 | Common | Ordinary Shares | 2026-06-01 | S | D | 320 | $912.22 | 337,851 | D | — | — | (F28) These Ordinary Shares were sold in multiple trades at prices ranging from $911.89 to $912.73. 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. |
| 29 | Common | Ordinary Shares | 2026-06-01 | S | D | 280 | $914.61 | 337,571 | D | — | — | (F29) These Ordinary Shares were sold in multiple trades at prices ranging from $914.14 to $914.78. 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. |
| 30 | Common | Ordinary Shares | 2026-06-01 | S | D | 200 | $915.52 | 337,371 | D | — | — | (F30) These Ordinary Shares were sold in multiple trades at prices ranging from $915.18 to $915.95. 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. |
| 31 | Derivative | NQ Options | 2026-06-01 | M | D | 14,000 | $0.00 | 139,100 | D | $46.23 · — to 2027-09-09 | 14,000 Ordinary Shares | (F31) Options granted to the Reporting Person under the Issuer's 2012 Equity Incentive Plan are subject to a four year vesting schedule. Subject to continuous employment, one quarter of the option shares vested on September 9, 2021. The remaining option shares vest in equal monthly installments over the 36 months following September 9, 2021. |