SEC Form 4 · accession 0001137789-26-000169
Seagate Technology Holdings plc · STX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Gianluca Romano
Officer — EVP & CFO
Period of report
Aug 7, 2026
Accepted (ET)
Aug 11, 2026 · 4:21 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001137789
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Ordinary SharesF1,F2,F3 | Aug 7, 2026 | S | 200 | $763.394 | D | 42,674 | D | |
| Ordinary SharesF4 | Aug 7, 2026 | S | 160 | $765.575 | D | 42,514 | D | |
| Ordinary SharesF5 | Aug 7, 2026 | S | 400 | $767.81 | D | 42,114 | D | |
| Ordinary SharesF6 | Aug 7, 2026 | S | 560 | $769.205 | D | 41,554 | D | |
| Ordinary SharesF7 | Aug 7, 2026 | S | 320 | $770.2677 | D | 41,234 | D | |
| Ordinary SharesF8 | Aug 7, 2026 | S | 321 | $771.3981 | D | 40,913 | D | |
| Ordinary SharesF9 | Aug 7, 2026 | S | 320 | $772.4525 | D | 40,593 | D | |
| Ordinary SharesF10 | Aug 7, 2026 | S | 280 | $773.5986 | D | 40,313 | D | |
| Ordinary SharesF11 | Aug 7, 2026 | S | 192 | $774.2713 | D | 40,121 | D | |
| Ordinary SharesF12 | Aug 7, 2026 | S | 127 | $775.5192 | D | 39,994 | D | |
| Ordinary SharesF13 | Aug 7, 2026 | S | 200 | $776.936 | D | 39,794 | D | |
| Ordinary SharesF14 | Aug 7, 2026 | S | 120 | $778.54 | D | 39,674 | D | |
| Ordinary SharesF15 | Aug 7, 2026 | S | 440 | $779.7282 | D | 39,234 | D | |
| Ordinary Shares | Aug 7, 2026 | S | 80 | $780.22 | D | 39,154 | D | |
| Ordinary SharesF16 | Aug 7, 2026 | S | 120 | $781.89 | D | 39,034 | D | |
| Ordinary SharesF17 | Aug 7, 2026 | S | 200 | $782.962 | D | 38,834 | D | |
| Ordinary SharesF18 | Aug 7, 2026 | S | 120 | $784.34 | D | 38,714 | D | |
| Ordinary SharesF19 | Aug 7, 2026 | S | 200 | $785.082 | D | 38,514 | D | |
| Ordinary SharesF20 | Aug 7, 2026 | S | 200 | $787.346 | D | 38,314 | D | |
| Ordinary SharesF21 | Aug 7, 2026 | S | 160 | $788.6025 | D | 38,154 | D | |
| Ordinary SharesF22 | Aug 7, 2026 | S | 240 | $789.4467 | D | 37,914 | D | |
| Ordinary SharesF23 | Aug 7, 2026 | S | 80 | $790.535 | D | 37,834 | D | |
| Ordinary SharesF24 | Aug 7, 2026 | S | 240 | $791.495 | D | 37,594 | D | |
| Ordinary SharesF25 | Aug 7, 2026 | S | 280 | $793.1505 | D | 37,314 | D | |
| Ordinary SharesF26 | Aug 7, 2026 | S | 547 | $793.7674 | D | 36,767 | D | |
| Ordinary SharesF27 | Aug 7, 2026 | S | 480 | $795.0192 | D | 36,287 | D | |
| Ordinary SharesF28 | Aug 7, 2026 | S | 93 | $796.4044 | D | 36,194 | D | |
| Ordinary SharesF29 | Aug 7, 2026 | S | 240 | $797.335 | D | 35,954 | D | |
| Ordinary SharesF30 | Aug 7, 2026 | S | 320 | $798.3338 | D | 35,634 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1All sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 30, 2026.
- F10These Ordinary Shares were sold in multiple trades at prices ranging from $773.06 to $774.02. 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.
- F11These Ordinary Shares were sold in multiple trades at prices ranging from $774.09 to 774.52. 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.
- F12These Ordinary Shares were sold in multiple trades at prices ranging from $775.22 to $776.07. 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.
- F13These Ordinary Shares were sold in multiple trades at prices ranging from $776.55 to $777.21. 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.
- F14These Ordinary Shares were sold in multiple trades at prices ranging from $777.95 to $778.89. 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.
- F15These Ordinary Shares were sold in multiple trades at prices ranging from $779.22 to $780.20. 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.
- F16These Ordinary Shares were sold in multiple trades at prices ranging from $781.39 to $782.26. 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.
- F17These Ordinary Shares were sold in multiple trades at prices ranging from $782.59 to $783.49. 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.
- F18These Ordinary Shares were sold in multiple trades at prices ranging from $783.87 to $784.86. 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.
- F19These Ordinary Shares were sold in multiple trades at prices ranging from $784.92 to $785.26. 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.
- F2These Ordinary Shares were sold in multiple trades at prices ranging from $762.99 to $763.68. 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.
- F20These Ordinary Shares were sold in multiple trades at prices ranging from $786.92 to $787.55. 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.
- F21These Ordinary Shares were sold in multiple trades at prices ranging from $788.11 to $789.00. 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.
- F22These Ordinary Shares were sold in multiple trades at prices ranging from $789.17 to $790.14. 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.
- F23These Ordinary Shares were sold in multiple trades at prices ranging from $790.17 to $790.90. 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.
- F24These Ordinary Shares were sold in multiple trades at prices ranging from $791.3 to $791.91. 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.
- F25These Ordinary Shares were sold in multiple trades at prices ranging from $792.40 to $793.35. 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.
- F26These Ordinary Shares were sold in multiple trades at prices ranging from $793.44 to $794.31. 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.
- F27These Ordinary Shares were sold in multiple trades at prices ranging from $794.50 to $795.39. 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.
- F28These Ordinary Shares were sold in multiple trades at prices ranging from $795.90 to $796.79. 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.
- F29These Ordinary Shares were sold in multiple trades at prices ranging from $796.94 to $797.61. 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.
- F3Includes 14 Ordinary Shares purchased by Reporting Person on July 31, 2026 under the Issuer's Employee Stock Purchase Plan. Such acquisition is exempt from reporting pursuant to Rule 16b-3 under the Securities Exchange Act of 1934.
- F30These Ordinary Shares were sold in multiple trades at prices ranging from $797.98 to $798.97. 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.
- F4These Ordinary Shares were sold in multiple trades at prices ranging from $765.35 to $765.76. 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.
- F5These Ordinary Shares were sold in multiple trades at prices ranging from $767.22 to $768.20. 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.
- F6These Ordinary Shares were sold in multiple trades at prices ranging from $768.69 to $769.66. 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.
- F7These Ordinary Shares were sold in multiple trades at prices ranging from $770.03 to $770.91. 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.
- F8These Ordinary Shares were sold in multiple trades at prices ranging from $771.03 to $772.00. 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.
- F9These Ordinary Shares were sold in multiple trades at prices ranging from $772.06 to $773.00. 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.