Western Digital Affiliate Martin I Cole Files Form 144 to Sell 4,000 Shares

Executive Summary

On October 29, 2026, Western Digital Corp affiliate Martin I Cole filed a Form 144 notice disclosing an intention to sell 4,000 shares of common stock with an aggregate market value of approximately $1,585,680 through J.P. Morgan Securities LLC.

Transaction & Plan Details

• Security: Common Stock
• Volume: 4,000 shares out of approximately 374,323,269 shares outstanding (~0.001%).
• Approximate Sale Date: October 29, 2026.
• Ownership Structure: Indirectly held via the Martin I Cole Revocable Trust, Martin I Cole as Trustee.
• Rule 10b5-1 Plan: The sale is being executed under a pre-established Rule 10b5-1 trading plan adopted on March 5, 2026.
• Acquisition History: The shares were originally acquired on November 14, 2023, directly from the issuer as equity compensation.

Market & Trading Assessment

The proposed transaction represents a negligible portion of Western Digital's outstanding shares and is executed under a pre-scheduled Rule 10b5-1 trading plan adopted months prior. Consequently, this filing reflects routine personal financial planning rather than a shift in internal sentiment regarding the company's operational trajectory.