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Ownership Document
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| Schema Version: X0508 |
| Document Type: 4 |
| Period of Report: 4/8/24 |
| Not Subject to Section 16: 0 |
| Issuer: |
| Issuer CIK: 106040 |
| Issuer Name: WESTERN DIGITAL CORP |
| Issuer Trading Symbol: WDC |
| Reporting Owner: |
| Reporting Owner ID: |
| | Owner CIK: 1456385 |
| | Owner Name: Zamiska Gene M. |
| Reporting Owner Address: |
| | Owner Street 1: C/O WESTERN DIGITAL CORPORATION |
| | Owner Street 2: 5601 GREAT OAKS PARKWAY |
| | Owner City: SAN JOSE |
| | Owner State: CA |
| | Owner ZIP Code: 95119 |
| | Owner State Description: |
| Reporting Owner Relationship: |
| | Is Director? No |
| | Is Officer? Yes |
| | Is Ten Percent Owner? No |
| | Is Other? No |
| | Officer Title: SVP & Princ. Acctg Officer |
| Aff 10b5 One: 1 |
| Non-Derivative Table: |
| Non-Derivative Transaction: |
| | Security Title: |
| | | Value: Common Stock |
| | Transaction Date: |
| | | Value: 4/8/24 |
| | Transaction Coding: |
| | | Transaction Form Type: 4 |
| | | Transaction Code: S |
| | | Equity Swap Involved? No |
| | | Footnote ID: F1 |
| | Transaction Amounts: |
| | | Transaction Shares: |
| Value: 443 |
| | | Transaction Price Per Share: |
| Value: 75.0 |
| | | Transaction Acquired-Disposed Code: |
| Value: D |
| | Post-Transaction Amounts: |
| | | Shares Owned Following Transaction: |
| Value: 30,958 |
| | Ownership Nature: |
| | | Direct or Indirect Ownership: |
| Value: D |
| Footnotes: |
| Footnote - F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2023. |
| Owner Signature: |
| Signature Name: By: /s/ Sandra Garcia Attorney-in-Fact For: Gene Zamiska |
| Signature Date: 4/9/24 |
