Mosley William D's Form 4 filing
Seagate Technology Holdings plc (STX) · filed May 21, 2026
- Accession no.
- 0001137789-26-000106
- Filed
- May 21, 2026
- Trade date
- May 20, 2026
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Checked
This filing lists 20 non-derivative transactions and 1 derivative transaction. Open-market sales total $22.5M. It was filed 1 day 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 |
|---|---|---|---|---|---|---|---|---|
| May 20, 2026 | Ordinary Shares | MOption exerciseAcquired | +14,000 | $46.23 | +$647,220 | 369,591 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −120 | $742.01F2 | −$89,041.2 | 369,471 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −560 | $743.14F3 | −$416,158.4 | 368,911 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −840 | $744.52F4 | −$625,396.8 | 368,071 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,264 | $745.55F5 | −$942,375.2 | 366,807 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,463 | $746.53F6 | −$1,092,173.39 | 365,344 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,605 | $747.64F7 | −$1,199,962.2 | 363,739 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,719 | $748.53F8 | −$1,286,723.07 | 362,020 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,619 | $749.67F9 | −$1,213,715.73 | 360,401 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −4,810 | $750.84F10 | −$3,611,540.4 | 355,591 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −4,206 | $751.75F11 | −$3,161,860.5 | 351,385 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −3,182 | $752.72F12 | −$2,395,155.04 | 348,203 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −2,708 | $753.69F13 | −$2,040,992.52 | 345,495 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −2,163 | $754.70F14 | −$1,632,416.1 | 343,332 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,661 | $755.72F15 | −$1,255,250.92 | 341,671 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −1,480 | $756.83F16 | −$1,120,108.4 | 340,191 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −320 | $758.05F17 | −$242,576 | 339,871 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −80 | $758.65 | −$60,692 | 339,791 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −80 | $760.49F18 | −$60,839.2 | 339,711 | Direct | |
| May 20, 2026 | Ordinary Shares | SSaleDisposed | −120 | $763.18F19 | −$91,581.6 | 339,591 | 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 |
|---|---|---|---|---|---|---|---|---|
| May 20, 2026 | Ordinary Shares | MOption exerciseDisposed | −14,000 | $0.00 | $0 | 153,100 | 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 $741.70 to $742.19. 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.
- F3
These Ordinary Shares were sold in multiple trades at prices ranging from $742.70 to $743.55. 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.
Referenced by the price of 1 transaction in Table I.
- F4
These Ordinary Shares were sold in multiple trades at prices ranging from $743.96 to $744.91. 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.
Referenced by the price of 1 transaction in Table I.
- F5
These Ordinary Shares were sold in multiple trades at prices ranging from $745.03 to $746.02. 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.
Referenced by the price of 1 transaction in Table I.
- F6
These Ordinary Shares were sold in multiple trades at prices ranging from $746.10 to $747.08. 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 $747.16 to $748.13. 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.
Referenced by the price of 1 transaction in Table I.
- F8
These Ordinary Shares were sold in multiple trades at prices ranging from $748.16 to $749.08. 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 $749.16 to $750.15. 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.
Referenced by the price of 1 transaction in Table I.
- F10
These Ordinary Shares were sold in multiple trades at prices ranging from $750.18 to $751.13. 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.
Referenced by the price of 1 transaction in Table I.
- F11
These Ordinary Shares were sold in multiple trades at prices ranging from $751.19 to $752.17. 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.
- F12
These Ordinary Shares were sold in multiple trades at prices ranging from $752.19 to $753.18. 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.
- F13
These Ordinary Shares were sold in multiple trades at prices ranging from $753.20 to $754.19. 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.
- F14
These Ordinary Shares were sold in multiple trades at prices ranging from $754.22 to $755.21. 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.
Referenced by the price of 1 transaction in Table I.
- F15
These Ordinary Shares were sold in multiple trades at prices ranging from $755.22 to $756.19. 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.
- F16
These Ordinary Shares were sold in multiple trades at prices ranging from $756.26 to $757.19. 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.
- F17
These Ordinary Shares were sold in multiple trades at prices ranging from $757.49 to $758.19. 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.
- F18
These Ordinary Shares were sold in multiple trades at prices ranging from $760.20 to $760.77. 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 $762.83 to $763.70. 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.
Referenced by the price of 1 transaction in Table I.