X0202 SCHEDULE 13G/A 0000106040 XXXXXXXX LIVE 2 Common Stock, $0.01 Par Value Per Share 03/31/2026 0002023554 Sandisk Corporation 80004C200 951 Sandisk Drive Milpitas CA 95035 Rule 13d-1(d) Western Digital Corporation DE 0 0 1038681 0 1038681 N 0.7 CO Sandisk Corporation 951 Sandisk Drive, Milpitas, CA 95035 Western Digital Corporation 5601 Great Oaks Parkway, San Jose, CA 95119 Delaware Y 1,038,681 shares of common stock as of May 15, 2026. 0.7%. The percent of class is based on 148,089,758 shares of common stock outstanding as of April 24, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q, filed on May 1, 2026 with the Securities and Exchange Commission. 0. In connection with the separation of Sandisk Corporation from Western Digital Corporation, Western Digital Corporation and Sandisk Corporation entered into a Stockholder's and Registration Rights Agreement, dated as of February 21, 2025, pursuant to which Western Digital Corporation granted to Sandisk Corporation a proxy to vote the shares of Sandisk Corporation common stock owned by Western Digital Corporation in proportion to the votes cast by Sandisk Corporation's other stockholders. As a result, Western Digital Corporation does not exercise voting power over any of the shares of Sandisk Corporation common stock that it beneficially owns. 0 1,038,681 0 N Y N Not Applicable. N Not Applicable. N Not Applicable. N Not Applicable. Y Western Digital Corporation /s/ Cynthia Tregillis 05/14/2026