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Western Digital (WDC) CEO logs small award exercises and tax share withholding

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Western Digital CEO Irving Tan reported routine equity award activity involving a small number of shares. On May 20 and 21, 2026, Tan exercised dividend equivalent rights tied to vested restricted stock units, receiving modest amounts of common stock. In connection with these vestings, the company withheld a total of 732 shares of common stock to cover tax obligations, as permitted under Rule 16b-3(e). After these transactions, Tan directly holds roughly 598,000 shares of Western Digital common stock, indicating these moves were minor relative to his overall position.

Positive

  • None.

Negative

  • None.
Insider Tan Irving
Role Chief Executive Officer
Type Security Shares Price Value
Exercise Dividend Equivalent Rights 23.681 $0.00 --
Exercise Common Stock 23 $0.00 --
Tax Withholding Common Stock 587 $486.46 $286K
Exercise Dividend Equivalent Rights 12.56 $0.00 --
Exercise Common Stock 12 $0.00 --
Tax Withholding Common Stock 145 $459.62 $67K
Holdings After Transaction: Dividend Equivalent Rights — 912.604 shares (Direct, null); Common Stock — 598,040 shares (Direct, null)
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).
Tax withholding shares May 21 587 shares Common stock withheld at $486.46 per share for tax obligation
Tax withholding shares May 20 145 shares Common stock withheld at $459.62 per share for tax obligation
Total tax withholding shares 732 shares Shares withheld incident to vesting of securities under Rule 16b-3(e)
Common shares acquired via exercises 35 shares 23 shares on May 21 and 12 shares on May 20 through M-code exercises
Dividend equivalent rights exercised 36.2406 rights Converted into common stock tied to vested restricted stock units
Post-transaction common shares (max reported) 598,162 shares Highest total shares following transaction across reported entries
Post-transaction dividend equivalent rights 936.2840 rights Remaining dividend equivalent rights after May 20 transaction
Dividend Equivalent Rights financial
"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"
Dividend equivalent rights are promises that mirror the cash payments shareholders get from a company’s profits, but they are paid to holders of certain awards (like stock options or restricted stock units) rather than to actual shares. Think of them as a paycheck top‑up that matches dividends while the award is not yet a real stock, and they matter to investors because they add to employee compensation costs and potential share dilution, affecting company profitability and per‑share value.
restricted stock units financial
"in connection with the vesting of restricted stock units to which the dividend equivalent rights relate"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
Rule 16b-3(e) regulatory
"Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e)."
SEC Form 4
FORM 4UNITED 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*
Tan Irving

(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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Chief Executive Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/20/2026M12(1)A$0.0598,162D
Common Stock05/20/2026F145(2)D$459.62598,017D
Common Stock05/21/2026M23(1)A$0.0598,040D
Common Stock05/21/2026F587(2)D$486.46597,453D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Dividend Equivalent Rights(1)05/20/2026M12.5601 (1) (1)Common Stock12.5601$0.0936.284D
Dividend Equivalent Rights(1)05/21/2026M23.6805 (1) (1)Common Stock23.6805$0.0912.6035D
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: Irving Tan05/22/2026
** Signature of Reporting PersonDate
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) CEO Irving Tan report in this Form 4?

Irving Tan reported routine equity award activity. He exercised dividend equivalent rights linked to restricted stock units and had shares withheld to cover taxes. These non-market transactions slightly adjusted his holdings but did not involve open-market buying or selling.

How many Western Digital shares were withheld for Irving Tan’s tax obligations?

A total of 732 shares were withheld for taxes. On May 20 and 21, 2026, Western Digital withheld 145 shares and 587 shares of common stock, respectively, to satisfy Tan’s tax obligations associated with vesting equity awards.

Did Irving Tan buy or sell Western Digital (WDC) stock on the open market?

The filing shows no open-market purchases or sales. The reported F-code transactions reflect shares withheld for taxes, and M-code entries reflect exercises of derivative awards, not discretionary market trades in Western Digital stock.

How many Western Digital shares does Irving Tan hold after these transactions?

Tan holds about 598,000 common shares directly. After the May 20–21, 2026 equity award exercises and related tax withholding, his direct ownership is reported at approximately 598,000 Western Digital common shares, indicating these transactions were small relative to his total stake.

What are dividend equivalent rights in the Western Digital CEO’s Form 4?

Dividend equivalent rights track dividends on unvested awards. In this case, they converted one-for-one into Western Digital common stock when the related restricted stock units vested, with a small cash payment made to settle a fractional right.

Are the Western Digital CEO’s transactions mainly exercises or sales?

The transactions are mainly option-like exercises and tax withholding. M-code entries reflect exercises of dividend equivalent rights into common stock, while F-code entries show shares withheld to cover taxes, rather than open-market sales.