| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Tregillis Cynthia L | Chief Legal Officer & Corp Sec | C/O WESTERN DIGITAL CORPORATION, 5601 GREAT OAKS PARKWAY, SAN JOSE | By: /s/ Sandra Garcia Attorney-in-Fact For: Cynthia Tregillis | 06 Feb 2026 | 0002057088 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WDC | Common Stock | Sale | $1,833,922 | -6,780 | -4.7% | $270.49 | 136,538 | 06 Feb 2026 | Direct |