[Form 4] WESTERN DIGITAL CORP Insider Trading Activity

Rhea-AI Filing Summary

Western Digital Corp (WDC) reported an insider equity transaction by its Chief of Global Operations, Vidyadhara K. Gubbi, on 11/25/2025. A small number of dividend equivalent rights converted into shares of common stock at an exercise price of $0.0, contributing to a beneficial ownership position of 150,323 shares immediately after that transaction. On the same date, 1,142 shares of common stock were withheld and disposed of at $155.41 per share to cover tax obligations related to vesting, leaving the officer with 149,181 shares held directly.

Insider Trade Summary

6.074 shares exercised/converted

Mixed 3 txns

Insider Gubbi Vidyadhara K

Role Chief of Global Operations

Type	Security	Shares	Price	Value
Exercise	Dividend Equivalent Rights	6.074	$0.00	--
Exercise	Common Stock	6	$0.00	--
Tax Withholding	Common Stock	1,142	$155.41	$177K

Holdings After Transaction: Dividend Equivalent Rights — 245.074 shares (Direct); Common Stock — 150,323 shares (Direct)

Footnotes (1)

1. The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right. Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gubbi Vidyadhara K

(Last) (First) (Middle)

C/O WESTERN DIGITAL CORPORATION

5601 GREAT OAKS PARKWAY

(Street)

SAN JOSE CA 95119

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
WESTERN DIGITAL CORP [ WDC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief of Global Operations

3. Date of Earliest Transaction (Month/Day/Year)
11/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/25/2025		M		6(1)	A	$0.0	150,323	D
Common Stock	11/25/2025		F		1,142(2)	D	$155.41	149,181	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Dividend Equivalent Rights	(1)	11/25/2025		M			6.0742	(1)	(1)	Common Stock	6.0742	$0.0	245.0735	D

Explanation of Responses:

1. The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

2. Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

	By: /s/ Sandra Garcia Attorney-in-Fact For: Vidyadhara K. Gubbi	11/26/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider activity did Western Digital (WDC) report in this Form 4?

The filing reports that Chief of Global Operations Vidyadhara K. Gubbi had dividend equivalent rights convert into shares of Western Digital common stock and also had shares withheld to cover taxes related to vesting on 11/25/2025.

How many Western Digital (WDC) shares does the reporting person own after the transactions?

After the reported transactions on 11/25/2025, the reporting person beneficially owns 149,181 shares of Western Digital common stock in direct ownership form.

What was the purpose of the share withholding in the Western Digital (WDC) Form 4?

The filing states that 1,142 shares were disposed of through withholding to pay tax obligations arising from the vesting of equity awards, in accordance with Rule 16b-3(e).

What are dividend equivalent rights mentioned in the Western Digital (WDC) filing?

The explanation notes that dividend equivalent rights were converted into and paid as shares of Western Digital common stock on a one-for-one basis when the related restricted stock units vested, with cash paid only for a fractional right.

What transaction codes appear in this Western Digital (WDC) Form 4 and what do they mean?

The Form 4 lists transaction code M for the conversion of dividend equivalent rights into common stock at an exercise price of $0.0, and code F for share withholding to satisfy tax obligations on vesting.

Is the Western Digital (WDC) Form 4 filed by one person or a group?

The document indicates that it is a Form filed by one reporting person, covering the transactions of the company’s Chief of Global Operations.