Form 4 for STX Seagate Technology
Accepted 2026-09-15 16:15:44 ET · period of report 2026-09-11 · accession 0001137789-26-000240 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-09-15 16:15 | 2026-09-11 | STX | Romano Gianluca | EVP, CFO | M - OptEx | $99.99 | +50.5K | 80.1K | +170% | +$5.05M |
| DMT | 2026-09-15 16:15 | 2026-09-11 | STX | Romano Gianluca | EVP, CFO | S - Sale+OE | $830.01 | -45.9K | 34.2K | -57% | -$38.10M |
| DMT | 2026-09-15 16:15 | 2026-09-11 | STX | Romano Gianluca | EVP, CFO | M - OptEx | $0.00 | -50.5K | 40.3K | -56% | $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 | 2026-09-11 | M | A | 8,517 | $68.83 | 38,137 | D | — | — | (F1) All option exercises and sales of Ordinary Shares reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 30, 2026. |
| 2 | Common | Ordinary Shares | 2026-09-11 | M | A | 15,067 | $64.31 | 53,204 | D | — | — | |
| 3 | Common | Ordinary Shares | 2026-09-11 | M | A | 13,475 | $101.34 | 66,679 | D | — | — | |
| 4 | Common | Ordinary Shares | 2026-09-11 | M | A | 13,439 | $158.40 | 80,118 | D | — | — | |
| 5 | Common | Ordinary Shares | 2026-09-11 | S | D | 1,040 | $819.39 | 79,078 | D | — | — | (F2) These Ordinary Shares were sold in multiple trades at prices ranging from $818.88 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. |
| 6 | Common | Ordinary Shares | 2026-09-11 | S | D | 1,320 | $820.54 | 77,758 | D | — | — | (F3) These Ordinary Shares were sold in multiple trades at prices ranging from $819.95 to $820.93. 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. |
| 7 | Common | Ordinary Shares | 2026-09-11 | S | D | 1,550 | $821.42 | 76,208 | D | — | — | (F4) These Ordinary Shares were sold in multiple trades at prices ranging from $820.96 to $821.94. 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 | 2026-09-11 | S | D | 1,690 | $822.50 | 74,518 | D | — | — | (F5) These Ordinary Shares were sold in multiple trades at prices ranging from $822.05 to $823.03. 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. |
| 9 | Common | Ordinary Shares | 2026-09-11 | S | D | 880 | $823.72 | 73,638 | D | — | — | (F6) These Ordinary Shares were sold in multiple trades at prices ranging from $823.12 to $824.10. 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 | 2026-09-11 | S | D | 1,400 | $824.60 | 72,238 | D | — | — | (F7) These Ordinary Shares were sold in multiple trades at prices ranging from $824.14 to $825.13. 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. |
| 11 | Common | Ordinary Shares | 2026-09-11 | S | D | 800 | $825.65 | 71,438 | D | — | — | (F8) These Ordinary Shares were sold in multiple trades at prices ranging from $825.14 to $826.13. 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. |
| 12 | Common | Ordinary Shares | 2026-09-11 | S | D | 1,840 | $826.72 | 69,598 | D | — | — | (F9) These Ordinary Shares were sold in multiple trades at prices ranging from $826.14 to $827.10. 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 | 2026-09-11 | S | D | 1,727 | $827.72 | 67,871 | D | — | — | (F10) These Ordinary Shares were sold in multiple trades at prices ranging from $827.17 to $828.10. 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 | 2026-09-11 | S | D | 3,321 | $828.84 | 64,550 | D | — | — | (F11) These Ordinary Shares were sold in multiple trades at prices ranging from $828.23 to $829.22. 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. |
| 15 | Common | Ordinary Shares | 2026-09-11 | S | D | 5,593 | $829.77 | 58,957 | D | — | — | (F12) These Ordinary Shares were sold in multiple trades at prices ranging from $829.24 to $830.23. 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 | 2026-09-11 | S | D | 7,568 | $830.74 | 51,389 | D | — | — | (F13) These Ordinary Shares were sold in multiple trades at prices ranging from $830.24 to $831.23. 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 | 2026-09-11 | S | D | 4,589 | $831.71 | 46,800 | D | — | — | (F14) These Ordinary Shares were sold in multiple trades at prices ranging from $831.24 to $832.23. 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 | 2026-09-11 | S | D | 4,220 | $832.68 | 42,580 | D | — | — | (F15) These Ordinary Shares were sold in multiple trades at prices ranging from $832.24 to $833.23. 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 | 2026-09-11 | S | D | 2,080 | $833.67 | 40,500 | D | — | — | (F16) These Ordinary Shares were sold in multiple trades at prices ranging from $833.25 to $834.20. 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 | 2026-09-11 | S | D | 1,440 | $834.80 | 39,060 | D | — | — | (F17) These Ordinary Shares were sold in multiple trades at prices ranging from $834.29 to $835.28. 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 | 2026-09-11 | S | D | 1,320 | $835.67 | 37,740 | D | — | — | (F18) These Ordinary Shares were sold in multiple trades at prices ranging from $835.29 to $836.27. 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. |
| 22 | Common | Ordinary Shares | 2026-09-11 | S | D | 480 | $836.92 | 37,260 | D | — | — | (F19) These Ordinary Shares were sold in multiple trades at prices ranging from $836.38 to $837.35. 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 | 2026-09-11 | S | D | 200 | $838.10 | 37,060 | D | — | — | (F20) These Ordinary Shares were sold in multiple trades at prices ranging from $837.58 to $838.44. 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 | 2026-09-11 | S | D | 880 | $839.15 | 36,180 | D | — | — | (F21) These Ordinary Shares were sold in multiple trades at prices ranging from $838.71 to $839.47. 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. |
| 25 | Common | Ordinary Shares | 2026-09-11 | S | D | 1,000 | $840.12 | 35,180 | D | — | — | (F22) These Ordinary Shares were sold in multiple trades at prices ranging from $839.72 to $840.44. 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 | 2026-09-11 | S | D | 320 | $841.05 | 34,860 | D | — | — | (F23) These Ordinary Shares were sold in multiple trades at prices ranging from $840.76 to $841.60. 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 | 2026-09-11 | S | D | 280 | $842.23 | 34,580 | D | — | — | (F24) These Ordinary Shares were sold in multiple trades at prices ranging from $842.02 to $842.52. 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. |
| 28 | Common | Ordinary Shares | 2026-09-11 | S | D | 360 | $843.55 | 34,220 | D | — | — | (F25) These Ordinary Shares were sold in multiple trades at prices ranging from $843.41 to $843.95. 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. |
| 29 | Derivative | NQ Options | 2026-09-11 | M | D | 8,517 | $0.00 | 0 | D | $68.83 · — to 2029-09-09 | 8,517 Ordinary Shares | (F26) Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. One-quarter of the options vested on September 9, 2023 and the remaining portion shall vest in equal monthly installments over the following three years for a total vesting period of four years. |
| 30 | Derivative | NQ Options | 2026-09-11 | M | D | 15,067 | $0.00 | 18,080 | D | $64.31 · — to 2030-09-11 | 15,067 Ordinary Shares | (F27) Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. One-quarter of the options vested on September 11, 2024 and the remaining portion shall vest in equal monthly installments over the following three years for a total vesting period of four years. |
| 31 | Derivative | NQ Options | 2026-09-11 | M | D | 13,475 | $0.00 | 32,340 | D | $101.34 · — to 2031-09-09 | 13,475 Ordinary Shares | (F28) Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. One- quarter shall vest on September 9, 2025 and the remaining portion shall vest in equal monthly installments over the following three years for a total vesting period of four years. |
| 32 | Derivative | NQ Stock Option | 2026-09-11 | M | D | 13,439 | $0.00 | 40,317 | D | $158.40 · — to 2032-08-20 | 13,439 Ordinary Shares | (F29) Options granted to the Reporting Person under the Plan are subject to a four-year vesting schedule. One-quarter vested on August 20, 2026 and the remaining portion shall vest in equal monthly installments over the following three years for a total vesting period of four years. |