| 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 | 28 Aug 2025 | 0002057088 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WDC | Common Stock | Award | $0 | +16.6K | +12.3% | $0.00 | 151K | 26 Aug 2025 | Direct | F1 |
| transaction | WDC | Common Stock | Options Exercise | $0 | +1 | +0% | $0.00 | 151K | 27 Aug 2025 | Direct | F2 |
| transaction | WDC | Common Stock | Tax liability | -$21.5K | -266 | -0.18% | $80.67 | 151K | 27 Aug 2025 | Direct | F3 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | WDC | Dividend Equivalent Rights | Options Exercise | $0 | -1.14 | -0.62% | $0.00 | 182 | 27 Aug 2025 | Common Stock | 1.14 | Direct | F2 |
| Id | Content |
|---|---|
| F1 | Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. |
| F2 | The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right. |
| F3 | Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). |