Western Digital (WDC)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-02-20 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: WESTERN DIGITAL CORP (WDC) CIK: 0000106040 --- Reporting Owner --- Name: Tan Irving CIK: 0001729518 Role: Director, Officer (Chief Executive Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-02-20 | Code: M (Exercise of derivative) Shares: +11 | Price: $0.00 Shares Owned After: 623,597 | Ownership: D (Direct) Footnotes: [F1] 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. [Transaction #2] Security: Common Stock Date: 2026-02-20 | Code: F (Payment of exercise/tax) Shares: -134 | Price: $285.52 Total Value: $38,259.68 Shares Owned After: 623,463 | Ownership: D (Direct) Footnotes: [F2] Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). [Transaction #3] Security: Common Stock Date: 2026-02-21 | Code: M (Exercise of derivative) Shares: +21 | Price: $0.00 Shares Owned After: 623,484 | Ownership: D (Direct) Footnotes: [F1] 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. [Transaction #4] Security: Common Stock Date: 2026-02-21 | Code: F (Payment of exercise/tax) Shares: -523 | Price: $285.52 Total Value: $149,326.96 Shares Owned After: 622,961 | Ownership: D (Direct) Footnotes: [F2] Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). --- Derivative Transactions --- [Transaction #1] Security: Dividend Equivalent Rights Date: 2026-02-20 | Code: M (Exercise of derivative) Shares: -11.1895 | Price: $0.00 Shares Owned After: 1,016.5952 | Ownership: D (Direct) Footnotes: [F1] 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. [F1] 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. [F1] 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. [Transaction #2] Security: Dividend Equivalent Rights Date: 2026-02-21 | Code: M (Exercise of derivative) Shares: -21.0964 | Price: $0.00 Shares Owned After: 995.4988 | Ownership: D (Direct) Footnotes: [F1] 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. [F1] 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. [F1] 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. --- Footnotes (Complete Index) --- F1: 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. F2: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e). --- Signature --- /s/ By: /s/ Sandra Garcia Attorney-in-Fact For: Irving Tan (2026-02-24)