X0609 4 2026-09-17 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 2026-09-17 4 A 0 3296 0.0 A 416706 D Common Stock 2026-09-17 4 S 0 40 1567.2555 D 416666 D Common Stock 2026-09-17 4 S 0 9604 1568.9988 D 407062 D Common Stock 2026-09-17 4 S 0 910 1570.0407 D 406152 D Common Stock 2026-09-17 4 S 0 4558 1571.2108 D 401594 D Common Stock 2026-09-17 4 S 0 1157 1572.6026 D 400437 D Common Stock 2026-09-17 4 S 0 306 1573.1541 D 400131 D Common Stock 2026-09-17 4 S 0 2588 1574.5674 D 397543 D Common Stock 2026-09-17 4 S 0 2778 1575.5829 D 394765 D Common Stock 2026-09-17 4 S 0 4139 1576.8204 D 390626 D Common Stock 2026-09-17 4 S 0 2876 1578.3401 D 387750 D Common Stock 2026-09-17 4 S 0 640 1579.405 D 387110 D Common Stock 2026-09-17 4 S 0 1480 1580.2465 D 385630 D Common Stock 2026-09-17 4 S 0 1080 1583.7989 D 384550 D Common Stock 2026-09-17 4 S 0 1520 1585.8487 D 383030 D Common Stock 2026-09-17 4 S 0 165 1587.0 D 382865 D Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. 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 $1567.00 to a high of $1567.49. 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 $1568.44 to a high of $1569.03. 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 $1569.605 to a high of $1570.56. 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 $1570.62 to a high of $1571.61. 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 $1571.74 to a high of $1572.66. 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 $1572.92 to a high of $1573.71. 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 $1574.24 to a high of $1575.11. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $1575.30 to a high of $1576.20. 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 $1576.59 to a high of $1577.00. 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 $1577.90 to a high of $1578.66. 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 $1579.00 to a high of $1579.72. 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 $1580.06 to a high of $1580.51. 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 $1583.65 to a high of $1584.00. 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 $1585.04 to a high of $1586.01. 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. By: /s/ Sharon Spehar Attorney-in-Fact For: David Goeckeler 2026-09-21