Form 4 for STX Seagate Technology
Accepted 2026-03-03 00:00:00 ET · period of report 2026-03-02 · accession 0001137789-26-000050 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2026-03-03 | 2026-03-02 | STX | MOSLEY WILLIAM D | CEO, Dir | S - Sale | $384.76 | -20.0K | 399.7K | -5% | -$7.70M |
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 | 2026-03-02 | S | D | 200 | $397.61 | 396,797 | D | — | — | (F18) These Ordinary Shares were sold in multiple trades at prices ranging from $397.51 to $397.70. 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 | 2026-03-02 | S | D | 100 | $400.27 | 396,697 | D | — | — | |
| 3 | Common | Ordinary Shares | 2026-03-02 | S | D | 300 | $402.09 | 396,397 | D | — | — | (F19) These Ordinary Shares were sold in multiple trades at prices ranging from $401.89 to $402.43. 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 | 2026-03-02 | S | D | 800 | $396.42 | 396,997 | D | — | — | (F17) These Ordinary Shares were sold in multiple trades at prices ranging from $395.77 to $396.74. 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 | 2026-03-02 | S | D | 600 | $394.75 | 397,797 | D | — | — | (F16) These Ordinary Shares were sold in multiple trades at prices ranging from $394.26 to $395.19. 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. |
| 6 | Common | Ordinary Shares | 2026-03-02 | S | D | 100 | $407.66 | 395,897 | D | — | — | |
| 7 | Common | Ordinary Shares | 2026-03-02 | S | D | 300 | $405.02 | 395,997 | D | — | — | (F20) These Ordinary Shares were sold in multiple trades at prices ranging from $404.64 to $405.36. 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 | 2026-03-02 | S | D | 500 | $393.33 | 398,397 | D | — | — | (F15) These Ordinary Shares were sold in multiple trades at prices ranging from $392.95 to $393.73. 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. |
| 9 | Common | Ordinary Shares | 2026-03-02 | S | D | 100 | $403.05 | 396,297 | D | — | — | |
| 10 | Common | Ordinary Shares | 2026-03-02 | S | D | 500 | $392.09 | 398,897 | D | — | — | (F14) These Ordinary Shares were sold in multiple trades at prices ranging from $391.68 to $392.58. 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 | 2026-03-02 | S | D | 300 | $390.02 | 399,397 | D | — | — | (F13) These Ordinary Shares were sold in multiple trades at prices ranging from $389.61 to $390.49. 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 | 2026-03-02 | S | D | 874 | $375.84 | 415,023 | 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 20, 2025. (F2) These Ordinary Shares were sold in multiple trades at prices ranging from $375.25 to $376.13. 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 | 2026-03-02 | S | D | 326 | $376.69 | 414,697 | D | — | — | (F3) These Ordinary Shares were sold in multiple trades at prices ranging from $376.37 to $376.91. 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 | 2026-03-02 | S | D | 800 | $377.95 | 413,897 | D | — | — | (F4) These Ordinary Shares were sold in multiple trades at prices ranging from $377.45 to $378.37. 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. |
| 15 | Common | Ordinary Shares | 2026-03-02 | S | D | 1,740 | $379.23 | 412,157 | D | — | — | (F5) These Ordinary Shares were sold in multiple trades at prices ranging from $378.69 to $379.68. 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 | 2026-03-02 | S | D | 1,260 | $380.42 | 410,897 | D | — | — | (F6) These Ordinary Shares were sold in multiple trades at prices ranging from $379.89 to $380.83. 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 | 2026-03-02 | S | D | 800 | $381.51 | 410,097 | D | — | — | (F7) These Ordinary Shares were sold in multiple trades at prices ranging from $380.95 to $381.92. 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 | 2026-03-02 | S | D | 3,500 | $382.41 | 406,597 | D | — | — | (F8) These Ordinary Shares were sold in multiple trades at prices ranging from $381.99 to $382.98. 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. |
| 19 | Common | Ordinary Shares | 2026-03-02 | S | D | 2,700 | $383.49 | 403,897 | D | — | — | (F9) These Ordinary Shares were sold in multiple trades at prices ranging from $383.05 to $384.00. 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. |
| 20 | Common | Ordinary Shares | 2026-03-02 | S | D | 2,700 | $384.51 | 401,197 | D | — | — | (F10) These Ordinary Shares were sold in multiple trades at prices ranging from $384.05 to $384.93. 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 | 2026-03-02 | S | D | 1,200 | $385.39 | 399,997 | D | — | — | (F11) These Ordinary Shares were sold in multiple trades at prices ranging from $385.11 to $386.02. 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 | 2026-03-02 | S | D | 300 | $387.54 | 399,697 | D | — | — | (F12) These Ordinary Shares were sold in multiple trades at prices ranging from $387.35 to $387.64. 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. |