SEC Form 4 · accession 0001266824-26-000126

WESTERN DIGITAL CORP · WDC

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Martin I Cole

Director

Period of report

Jun 9, 2026

Accepted (ET)

Jun 11, 2026 · 5:47 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0000106040

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock^F2	Jun 9, 2026	S	48	$484.2833	D	29,385	D
Common Stock	Jun 9, 2026	S	16	$485.54	D	29,369	D
Common Stock^F3	Jun 9, 2026	S	48	$486.8667	D	29,321	D
Common Stock	Jun 9, 2026	S	16	$488.06	D	29,305	D
Common Stock^F4	Jun 9, 2026	S	38	$491.0595	D	29,267	D
Common Stock^F5	Jun 9, 2026	S	30	$492.3783	D	29,237	D
Common Stock^F6	Jun 9, 2026	S	44	$493.6418	D	29,193	D
Common Stock^F7	Jun 9, 2026	S	32	$494.625	D	29,161	D
Common Stock^F8	Jun 9, 2026	S	48	$497.4667	D	29,113	D
Common Stock^F9	Jun 9, 2026	S	48	$498.9467	D	29,065	D
Common Stock	Jun 9, 2026	S	16	$499.69	D	29,049	D
Common Stock^F10	Jun 9, 2026	S	64	$501.7225	D	28,985	D
Common Stock^F11	Jun 9, 2026	S	128	$502.8702	D	28,857	D
Common Stock^F12	Jun 9, 2026	S	80	$503.802	D	28,777	D
Common Stock^F13	Jun 9, 2026	S	96	$505.5117	D	28,681	D
Common Stock^F14	Jun 9, 2026	S	96	$507.9383	D	28,585	D
Common Stock^F15	Jun 9, 2026	S	32	$509.1606	D	28,553	D
Common Stock^F16	Jun 9, 2026	S	326	$510.6106	D	28,227	D
Common Stock^F17	Jun 9, 2026	S	310	$511.6651	D	27,917	D
Common Stock^F18	Jun 9, 2026	S	316	$513.1445	D	27,601	D
Common Stock^F19	Jun 9, 2026	S	296	$514.0944	D	27,305	D
Common Stock^F20	Jun 9, 2026	S	392	$515.399	D	26,913	D
Common Stock^F21	Jun 9, 2026	S	112	$516.7171	D	26,801	D
Common Stock^F22	Jun 9, 2026	S	216	$517.5896	D	26,585	D
Common Stock^F23	Jun 9, 2026	S	48	$519.2533	D	26,537	D
Common Stock^F24	Jun 9, 2026	S	160	$521.139	D	26,377	D
Common Stock^F25	Jun 9, 2026	S	32	$523.23	D	26,345	D
Common Stock^F26	Jun 9, 2026	S	48	$524.72	D	26,297	D
Common Stock	Jun 9, 2026	S	16	$525.56	D	26,281	D
Common Stock^F27	Jun 9, 2026	S	128	$527.2238	D	26,153	D

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2026.
F10Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $501.34 to a high of $502.26. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F11Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $502.49 to a high of $503.39. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F12Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $503.52 to a high of $504.05. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F13Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $504.99 to a high of $505.95. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F14Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $507.51 to a high of $508.25. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F15Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $508.67 to a high of $509.38. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F16Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $510.20 to a high of $511.11. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F17Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $511.22 to a high of $512.18. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F18Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $512.66 to a high of $513.65. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F19Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $513.81 to a high of $514.62. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F2Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $483.99 to a high of $484.57. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F20Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $514.95 to a high of $515.86. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F21Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $515.99 to a high of $516.91. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F22Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $517.17 to a high of $518.16. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F23Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $518.90 to a high of $519.79. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F24Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $520.76 to a high of $521.59. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F25Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $522.98 to a high of $523.48. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F26Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $524.19 to a high of $525.01. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F27Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $526.82 to a high of $527.60. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F3Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $486.54 to a high of $487.31. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F4Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $490.99 to a high of $491.43. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F5Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $491.99 to a high of $492.88. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F6Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $493.02 to a high of $493.99. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F7Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $494.18 to a high of $495.07. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F8Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $497.11 to a high of $497.69. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.
F9Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $498.49 to a high of $499.18. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.