Mosley William D's Form 4 filing
Seagate Technology Holdings plcSTX · filed Sep 3, 2026
- Accession no.
- 0001137789-26-000197
- Filed
- Sep 3, 2026, 4:51 PM ET
- Trade date
- Sep 1, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 27 non-derivative transactions and 1 derivative transaction. Open-market sales total $24.5M. It was filed 2 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Mosley William DCIK 0001388390 | Director, Officer (CEO) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 1, 2026 | Ordinary Shares | MOption exerciseAcquired | +14,000 | $46.23 | +$647,220 | 325,167.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −357 | $804.61F2 | −$287,245.16 | 324,810.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −160 | $805.55F3 | −$128,887.7 | 324,650.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −160 | $807.19F4 | −$129,150.8 | 324,490.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −960 | $808.62F5 | −$776,275.3 | 323,530.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,160 | $809.55F6 | −$939,079.62 | 322,370.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,105 | $810.78F7 | −$895,915.55 | 321,265.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,578 | $811.73F8 | −$1,280,906.15 | 319,687.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,200 | $812.55F9 | −$975,056.76 | 318,487.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −2,040 | $813.74F10 | −$1,660,027.15 | 316,447.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −2,878 | $814.75F11 | −$2,344,852.51 | 313,569.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −4,555 | $815.75F12 | −$3,715,738.06 | 309,014.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −4,287 | $816.75F13 | −$3,501,391.39 | 304,727.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −2,080 | $817.71F14 | −$1,700,829.1 | 302,647.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,040 | $818.78F15 | −$851,533.38 | 301,607.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,320 | $819.84F16 | −$1,082,194.34 | 300,287.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −920 | $820.89F17 | −$755,221.56 | 299,367.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −480 | $822.05F18 | −$394,583.86 | 298,887.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −600 | $822.89F19 | −$493,734 | 298,287.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −1,240 | $824.05F20 | −$1,021,820.02 | 297,047.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −600 | $824.93F21 | −$494,960.82 | 296,447.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −580 | $826.00F22 | −$479,079.01 | 295,867.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −340 | $826.86F23 | −$281,132.4 | 295,527.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −120 | $827.90F24 | −$99,347.6 | 295,407.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −80 | $829.10F25 | −$66,327.6 | 295,327.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −80 | $830.36F26 | −$66,428.8 | 295,247.5 | Direct | |
| Sep 1, 2026 | Ordinary Shares | SSaleDisposed | −80 | $832.05F27 | −$66,563.6 | 295,167.5 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 1, 2026 | Ordinary Shares | MOption exerciseDisposed | −14,000 | $0.00 | $0 | 97,100 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F2
These Ordinary Shares were sold in multiple trades at prices ranging from $804.17 to $804.83. 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.
Referenced by the price of 1 transaction in Table I.
- F3
These Ordinary Shares were sold in multiple trades at prices ranging from $805.21 to $805.76. 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.
Referenced by the price of 1 transaction in Table I.
- F4
These Ordinary Shares were sold in multiple trades at prices ranging from $806.93 to $807.42. 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.
Referenced by the price of 1 transaction in Table I.
- F5
These Ordinary Shares were sold in multiple trades at prices ranging from $808.02 to $809.00. 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.
Referenced by the price of 1 transaction in Table I.
- F6
These Ordinary Shares were sold in multiple trades at prices ranging from $809.05 to $810.01. 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.
Referenced by the price of 1 transaction in Table I.
- F7
These Ordinary Shares were sold in multiple trades at prices ranging from $810.17 to $811.14. 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.
Referenced by the price of 1 transaction in Table I.
- F8
These Ordinary Shares were sold in multiple trades at prices ranging from $811.18 to $812.10. 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.
Referenced by the price of 1 transaction in Table I.
- F9
These Ordinary Shares were sold in multiple trades at prices ranging from $812.19 to $813.04. 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.
Referenced by the price of 1 transaction in Table I.
- F10
These Ordinary Shares were sold in multiple trades at prices ranging from $813.20 to $814.19. 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.
Referenced by the price of 1 transaction in Table I.
- F11
These Ordinary Shares were sold in multiple trades at prices ranging from $814.23 to $815.22. 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.
Referenced by the price of 1 transaction in Table I.
- F12
These Ordinary Shares were sold in multiple trades at prices ranging from $815.28 to $816.27. 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.
Referenced by the price of 1 transaction in Table I.
- F13
These Ordinary Shares were sold in multiple trades at prices ranging from $816.28 to $817.27. 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.
Referenced by the price of 1 transaction in Table I.
- F14
These Ordinary Shares were sold in multiple trades at prices ranging from $817.29 to $818.20. 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.
Referenced by the price of 1 transaction in Table I.
- F15
These Ordinary Shares were sold in multiple trades at prices ranging from $818.29 to $819.18. 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.
Referenced by the price of 1 transaction in Table I.
- F16
These Ordinary Shares were sold in multiple trades at prices ranging from $819.32 to $820.29. 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.
Referenced by the price of 1 transaction in Table I.
- F17
These Ordinary Shares were sold in multiple trades at prices ranging from $820.36 to $821.26. 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.
Referenced by the price of 1 transaction in Table I.
- F18
These Ordinary Shares were sold in multiple trades at prices ranging from $821.44 to $822.37. 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.
Referenced by the price of 1 transaction in Table I.
- F19
These Ordinary Shares were sold in multiple trades at prices ranging from $822.47 to $823.42. 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.
Referenced by the price of 1 transaction in Table I.
- F20
These Ordinary Shares were sold in multiple trades at prices ranging from $823.47 to $824.40. 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.
Referenced by the price of 1 transaction in Table I.
- F21
These Ordinary Shares were sold in multiple trades at prices ranging from $824.47 to $825.44. 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.
Referenced by the price of 1 transaction in Table I.
- F22
These Ordinary Shares were sold in multiple trades at prices ranging from $825.51 to $826.27. 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.
Referenced by the price of 1 transaction in Table I.
- F23
These Ordinary Shares were sold in multiple trades at prices ranging from $826.52 to $827.29. 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.
Referenced by the price of 1 transaction in Table I.
- F24
These Ordinary Shares were sold in multiple trades at prices ranging from $827.76 to $828.17. 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.
Referenced by the price of 1 transaction in Table I.
- F25
These Ordinary Shares were sold in multiple trades at prices ranging from $829.09 to $829.10. 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.
Referenced by the price of 1 transaction in Table I.
- F26
These Ordinary Shares were sold in multiple trades at prices ranging from $830.22 to $830.50. 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.
Referenced by the price of 1 transaction in Table I.
- F27
These Ordinary Shares were sold in multiple trades at prices ranging from $832.02 to $832.07. 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.
Referenced by the price of 1 transaction in Table I.