Mosley William D's Form 4 filing
Seagate Technology Holdings plcSTX · filed Oct 2, 2026
- Accession no.
- 0001137789-26-000261
- Filed
- Oct 2, 2026, 4:07 PM ET
- Trade date
- Oct 1, 2026
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Checked
This filing lists 29 non-derivative transactions and 1 derivative transaction. Open-market sales total $17.4M. 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 |
|---|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | Ordinary Shares | MOption exerciseAcquired | +14,000 | $46.23 | +$647,220 | 392,108.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −360 | $898.10F2 | −$323,314.42 | 391,748.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −517 | $900.46F3 | −$465,538.75 | 391,231.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −440 | $901.49F4 | −$396,654.81 | 390,791.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −384 | $902.55F5 | −$346,578.55 | 390,407.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −696 | $903.36F6 | −$628,740.79 | 389,711.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −480 | $904.33F7 | −$434,079.6 | 389,231.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −480 | $905.38F8 | −$434,583.12 | 388,751.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −601 | $906.42F9 | −$544,760.34 | 388,150.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −560 | $907.43F10 | −$508,161.98 | 387,590.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −1,027 | $908.58F11 | −$933,109.71 | 386,563.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −307 | $909.84F12 | −$279,322.23 | 386,256.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −840 | $910.69F13 | −$764,982.37 | 385,416.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −1,146 | $912.04F14 | −$1,045,202.19 | 384,270.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −696 | $913.08F15 | −$635,502.57 | 383,574.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −904 | $913.94F16 | −$826,203.39 | 382,670.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −960 | $915.01F17 | −$878,407.97 | 381,710.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −480 | $916.10F18 | −$439,725.98 | 381,230.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −400 | $917.22F19 | −$366,888.8 | 380,830.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −920 | $918.49F20 | −$845,012.82 | 379,910.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −840 | $919.56F21 | −$772,428.38 | 379,070.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −630 | $920.62F22 | −$579,988.08 | 378,440.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −930 | $921.64F23 | −$857,120.55 | 377,510.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −800 | $922.66F24 | −$738,126 | 376,710.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −760 | $923.78F25 | −$702,074.4 | 375,950.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −640 | $924.72F26 | −$591,820.67 | 375,310.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −1,080 | $925.88F27 | −$999,953.21 | 374,230.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −480 | $926.78F28 | −$444,852.38 | 373,750.25 | Direct | |
| Oct 1, 2026 | Ordinary Shares | SSaleDisposed | −640 | $927.90F29 | −$593,853.63 | 373,110.25 | 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 |
|---|---|---|---|---|---|---|---|---|
| Oct 1, 2026 | Ordinary Shares | MOption exerciseDisposed | −14,000 | $0.00 | $0 | 83,100 | 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 $897.79 to $898.58. 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.
Referenced by the price of 1 transaction in Table I.
- F3
These Ordinary Shares were sold in multiple trades at prices ranging from $899.96 to $900.87. 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 $900.96 to $901.95. 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.
Referenced by the price of 1 transaction in Table I.
- F5
These Ordinary Shares were sold in multiple trades at prices ranging from $901.97 to $902.93. 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.
Referenced by the price of 1 transaction in Table I.
- F6
These Ordinary Shares were sold in multiple trades at prices ranging from $903.00 to $903.79. 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.
Referenced by the price of 1 transaction in Table I.
- F7
These Ordinary Shares were sold in multiple trades at prices ranging from $904.00 to $904.95. 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.
Referenced by the price of 1 transaction in Table I.
- F8
These Ordinary Shares were sold in multiple trades at prices ranging from $905.01 to $905.98. 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.
Referenced by the price of 1 transaction in Table I.
- F9
These Ordinary Shares were sold in multiple trades at prices ranging from $906.06 to $906.98. 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.
Referenced by the price of 1 transaction in Table I.
- F10
These Ordinary Shares were sold in multiple trades at prices ranging from $907.08 to $908.07. 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.
- F11
These Ordinary Shares were sold in multiple trades at prices ranging from $908.16 to $909.15. 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.
- F12
These Ordinary Shares were sold in multiple trades at prices ranging from $909.22 to $910.20. 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.
- F13
These Ordinary Shares were sold in multiple trades at prices ranging from $910.22 to $911.20. 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.
- F14
These Ordinary Shares were sold in multiple trades at prices ranging from $911.51 to $912.47. 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.
Referenced by the price of 1 transaction in Table I.
- F15
These Ordinary Shares were sold in multiple trades at prices ranging from $912.54 to $913.53. 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 $913.55 to $914.39. 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.
Referenced by the price of 1 transaction in Table I.
- F17
These Ordinary Shares were sold in multiple trades at prices ranging from $914.56 to $915.52. 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.
Referenced by the price of 1 transaction in Table I.
- F18
These Ordinary Shares were sold in multiple trades at prices ranging from $915.61 to $916.45. 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 $917.02 to $917.62. 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 $918.05 to $919.02. 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.
- F21
These Ordinary Shares were sold in multiple trades at prices ranging from $919.07 to $920.03. 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.
Referenced by the price of 1 transaction in Table I.
- F22
These Ordinary Shares were sold in multiple trades at prices ranging from $920.10 to $921.09. 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 $921.15 to $922.08. 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.
- F24
These Ordinary Shares were sold in multiple trades at prices ranging from $922.16 to $923.03. 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.
Referenced by the price of 1 transaction in Table I.
- F25
These Ordinary Shares were sold in multiple trades at prices ranging from $923.19 to $924.18. 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.
- F26
These Ordinary Shares were sold in multiple trades at prices ranging from $924.21 to $925.19. 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.
- F27
These Ordinary Shares were sold in multiple trades at prices ranging from $925.27 to $926.22. 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.
- F28
These Ordinary Shares were sold in multiple trades at prices ranging from $926.33 to $927.20. 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.
- F29
These Ordinary Shares were sold in multiple trades at prices ranging from $927.41 to $928.36. 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.
Referenced by the price of 1 transaction in Table I.