Dividend rights granted to Western Digital (WDC) director Matthew Massengill

Rhea-AI Filing Summary

Western Digital director Matthew E. Massengill reported a routine compensation-related award of dividend equivalent rights. On this Form 4, he acquired 11.8849 dividend equivalent rights linked to previously granted restricted stock units. Following this grant, he holds a total of 104.7371 dividend equivalent rights, each tied to Western Digital common stock or its cash value as the underlying RSUs vest.

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

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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^*

MASSENGILL MATTHEW E

(Last) (First) (Middle)

C/O WESTERN DIGITAL CORPORATION

5601 GREAT OAKS PARKWAY

(Street)

SAN JOSE CALIFORNIA 95119

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/18/2026

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

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

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

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

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)	03/18/2026		A		11.8849		(1)	(1)	Common Stock	11.8849	$0.0	104.7371	D

Explanation of Responses:

1. The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

	By: /s/ Sandra Garcia Attorney-in-Fact For: Matthew Massengill	03/19/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Western Digital (WDC) report for Matthew E. Massengill?

Western Digital director Matthew E. Massengill received a grant of dividend equivalent rights. He was awarded 11.8849 dividend equivalent rights tied to previously granted restricted stock units, increasing his total holdings of these derivative rights to 104.7371, all linked to Western Digital common stock or its cash value.

What are the dividend equivalent rights reported for Western Digital (WDC)?

The dividend equivalent rights represent compensation linked to restricted stock units. Each right accrues on earlier RSU awards and represents a contingent right to receive one share of Western Digital common stock, or its cash value, vesting proportionately with the underlying RSUs over time.

How many dividend equivalent rights did the Western Digital (WDC) director acquire?

Director Matthew E. Massengill acquired 11.8849 dividend equivalent rights. These rights accrued on previously awarded restricted stock units and reflect additional derivative-based compensation, rather than an open-market stock purchase or sale, aligning with the vesting schedule of his existing RSU grants.

What is Matthew E. Massengill’s total holding of dividend equivalent rights in Western Digital (WDC)?

After the reported grant, Massengill holds 104.7371 dividend equivalent rights. This total reflects the cumulative derivative rights associated with his prior restricted stock unit awards, each representing a potential share of Western Digital common stock or equivalent cash value as those RSUs vest.

Does the Western Digital (WDC) Form 4 show an open-market stock trade?

No, the Form 4 shows a compensation-related award, not an open-market trade. The transaction is coded as a grant or other acquisition of dividend equivalent rights accruing on existing restricted stock units, with no indicated purchase or sale of common shares in the open market.