X0609 4 2026-09-14 0 0002023554 Sandisk Corp SNDK 0001713941 Goeckeler David false C/O SANDISK CORPORATION 951 SANDISK DRIVE MILPITAS CA 95035 1 1 0 0 Chairman & CEO 1 Common Stock 2026-09-14 4 S 0 14364 1522.5874 D 432884 D Common Stock 2026-09-14 4 S 0 181 1522.87 D 432703 D Common Stock 2026-09-14 4 S 0 3075 1524.2678 D 429628 D Common Stock 2026-09-14 4 S 0 2280 1526.4463 D 427348 D Common Stock 2026-09-14 4 S 0 4080 1528.4464 D 423268 D Common Stock 2026-09-14 4 S 0 359 1529.36 D 422909 D Common Stock 2026-09-14 4 S 0 1200 1532.17 D 421709 D Common Stock 2026-09-14 4 S 0 700 1535.1168 D 421009 D Common Stock 2026-09-14 4 S 0 1695 1535.9626 D 419314 D Common Stock 2026-09-14 4 S 0 3200 1537.6776 D 416114 D Common Stock 2026-09-14 4 S 0 1480 1539.19 D 414634 D Common Stock 2026-09-14 4 S 0 864 1540.7796 D 413770 D Common Stock 2026-09-14 4 S 0 360 1541.8811 D 413410 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 29, 2026. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1521.85 to a high of $1522.75. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1524.00 to a high of $1524.66. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1526.42 to a high of $1526.48. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1528.00 to a high of $1528.56. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1534.60 to a high of $1535.58. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1535.92 to a high of $1536.36. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1537.60 to a high of $1537.83. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1540.30 to a high of $1541.00. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1541.88 to a high of $1541.89. 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. By: /s/ Sharon Spehar Attorney-in-Fact For: David Goeckeler 2026-09-16