Martin I. Cole - 28 Jul 2026 Form 4 Insider Report for WESTERN DIGITAL CORP (WDC)

Reporting relationship: Director
Issuer ticker: WDC
Reported as of: 28 Jul 2026
Net transaction value: -$88,852
SEC form: 4
Accepted by SEC: 29 Jul 2026, 19:32:27 UTC
Prior SEC filing: 22 Jun 2026
Source filing: View source filing
Reporting owner signature: By: /s/ Sandra Garcia Attorney-in-Fact For: Martin Cole

Key filing fact

Martin I. Cole filed Form 4 for WESTERN DIGITAL CORP (WDC) on 29 Jul 2026.

Key facts

This page summarizes Martin I. Cole's Form 4 filing for WESTERN DIGITAL CORP (WDC).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 29 Jul 2026, 19:32.

Change

Previous filing in this sequence was filed on 22 Jun 2026.
Current net transaction value: -$88,852.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001302874 Primary reporting owner

Cole Martin I

Relationship: Director
Address: C/O WESTERN DIGITAL CORPORATION, 5601 GREAT OAKS PARKWAY, SAN JOSE
Signature: By: /s/ Sandra Garcia Attorney-in-Fact For: Martin Cole
Signature date: 29 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WDC transaction

Common Stock

Sale

Transaction value: $73,968
Shares: -160
Change %: -0.74%
Price: $462.30
Shares after: 21,465
Date: 28 Jul 2026
Ownership: Direct
Footnotes: F1, F2, F3

WDC transaction

Common Stock

Sale

Transaction value: $14,884
Shares: -32
Change %: -0.15%
Price: $465.12
Shares after: 21,433
Date: 28 Jul 2026
Ownership: Direct
Footnotes: F2, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 4 footnotes

Footnote F1

Due to SEC rules limiting the number of transactions that can be reported on a single Form 4, this Form 4 is a continuation of the Form 4 filed for the same date listed above.

Footnote F2

The 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.

Footnote F3

Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $462.03 to a high of $462.50. 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.

Footnote F4

Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $465.04 to a high of $465.21. 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.