Western Digital (WDC) CLO awarded new dividend-equivalent rights

Rhea-AI Filing Summary

Tregillis Cynthia L reported acquisition or exercise transactions in this Form 4 filing.

Western Digital Corp Chief Legal Officer and Corporate Secretary Cynthia L. Tregillis received a grant of 40.707 dividend equivalent rights tied to previously awarded restricted stock units. These rights vest proportionately with the related RSUs and each right represents a contingent right to receive one share of common stock or its cash value. Following this award, her reported balance of dividend equivalent rights is 345.120. This is a compensation-related, non–open-market transaction.

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

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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^*

Tregillis Cynthia L

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Legal Officer & Corp Sec

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		40.707		(1)	(1)	Common Stock	40.707	$0.0	345.12	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: Cynthia Tregillis	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 did Western Digital (WDC) report in this Form 4 for Cynthia Tregillis?

Western Digital reported that Chief Legal Officer Cynthia L. Tregillis received a grant of 40.707 dividend equivalent rights. These rights are linked to previously awarded RSUs and increase her compensation-related equity exposure without involving any open-market stock purchase or sale.

How many dividend equivalent rights did Cynthia Tregillis receive in this WDC filing?

Cynthia Tregillis received 40.707 dividend equivalent rights. These rights accrue on previously granted restricted stock units and vest on the same schedule, providing a contingent right to receive one share of Western Digital common stock or the cash value for each right at settlement.

What is Cynthia Tregillis’ total reported balance of dividend equivalent rights after this transaction?

After this grant, Cynthia Tregillis’ reported balance of dividend equivalent rights is 345.120. This figure reflects all such rights held following the award and represents potential future receipt of Western Digital common stock or equivalent cash value as the underlying RSUs vest.

What does the Form 4 transaction code “A” mean for Western Digital (WDC)?

The transaction code “A” on this Form 4 indicates a grant, award, or other acquisition rather than an open-market trade. For Western Digital, it shows Cynthia Tregillis acquired dividend equivalent rights as part of her equity compensation tied to existing restricted stock units.

Are the dividend equivalent rights in this Western Digital Form 4 immediately settled in stock?

The dividend equivalent rights are not immediately settled; each represents a contingent right to receive one share of common stock or its cash value. They vest proportionately with the underlying restricted stock units, so settlement occurs over time as those RSUs vest.

Is this Western Digital (WDC) Form 4 transaction an open-market stock purchase or sale?

No, this Form 4 does not show an open-market purchase or sale. It reflects a compensation-related grant of dividend equivalent rights to Cynthia Tregillis, linked to her existing RSUs, with no reported cash-paid market trade in Western Digital common stock.