Western Digital (NASDAQ: WDC) CEO sells 20,000 shares under 10b5-1 plan

Q: What did Western Digital (WDC) CEO Irving Tan report in this Form 4?

Irving Tan reported selling 20,000 shares of Western Digital common stock in open‑market trades on May 1, 2026 . These transactions were executed under a pre‑arranged Rule 10b5‑1 trading plan and he continues to hold a substantial direct stake.

Q: How many Western Digital (WDC) shares does CEO Irving Tan still own?

After the reported sales, Irving Tan directly holds 598,150 shares of Western Digital common stock. This figure in the Form 4 reflects his remaining direct ownership following the 20,000 shares sold across multiple open‑market transactions on May 1, 2026.

Q: Was Irving Tan’s Western Digital (WDC) stock sale pre‑planned?

Yes. A footnote states the sales were effected under a Rule 10b5‑1 trading plan adopted on May 12, 2025. Such plans allow insiders to schedule trades in advance, helping separate personal trading decisions from day‑to‑day market developments.

Q: How many separate sale transactions did the Western Digital (WDC) Form 4 disclose?

The Form 4 transaction summary reports nine sale transactions, all involving Western Digital common stock. Together, these open‑market sales totaled 20,000 shares sold on May 1, 2026, with detailed weighted average pricing and ranges provided in the accompanying footnotes.

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Western Digital Corp Chief Executive Officer Irving Tan reported selling 20,000 shares of company common stock in open‑market transactions. The sales occurred on May 1, 2026 in nine separate trades at weighted average prices generally around $406–$415 per share, as described in the pricing footnotes.

The filing states these sales were made under a pre‑arranged Rule 10b5‑1 trading plan adopted by Tan on May 12, 2025. After the transactions, he continues to hold 598,150 shares of Western Digital common stock directly.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($8,236,864)

Net Sell 9 txns

Insider Tan Irving

Role Chief Executive Officer

Sold 20,000 shs ($8.24M)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,257	$406.5204	$1.32M
Sale	Common Stock	512	$407.3193	$209K
Sale	Common Stock	584	$408.2328	$238K
Sale	Common Stock	546	$409.6283	$224K
Sale	Common Stock	920	$410.7583	$378K
Sale	Common Stock	680	$411.8653	$280K
Sale	Common Stock	5,711	$413.1223	$2.36M
Sale	Common Stock	7,355	$413.9192	$3.04M
Sale	Common Stock	435	$415.0157	$181K

Holdings After Transaction: Common Stock — 614,893 shares (Direct, null)

Footnotes (1)

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $405.6950 to a high of $406.6800. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $406.8100 to a high of $407.5300. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $407.8150 to a high of $408.5900. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $409.0000 to a high of $409.9900. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $410.1600 to a high of $411.1500. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $411.3750 to a high of $412.3500. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $412.4800 to a high of $413.4750. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $413.4800 to a high of $414.2000. 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. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $414.6700 to a high of $415.4200. 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.

Key Figures

Shares sold: 20,000 shares Holdings after sale: 598,150 shares Lowest price in range: $405.6950 per share +2 more

5 metrics

Shares sold 20,000 shares Total Western Digital common shares sold on May 1, 2026

Holdings after sale 598,150 shares Direct Western Digital common stock owned by Irving Tan after transactions

Lowest price in range $405.6950 per share Lowest individual trade price noted in the pricing footnotes

Highest price in range $415.4200 per share Highest individual trade price noted in the pricing footnotes

Number of sale transactions 9 sales SellCount in transaction summary for May 1, 2026

Key Terms

Form 4, Rule 10b5-1 trading plan, weighted average sale price per share, open-market sale, +1 more

5 terms

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Rule 10b5-1 trading plan regulatory

"were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale", "transaction_code_description": "Sale in open market or private transaction""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Reporting Person regulatory

"The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer"

Form 4 Insider Transactions: What Each Field Means →

05/05/2026 - 06:14 PM

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^*

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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/01/2026		S⁽¹⁾		3,257	D	$406.5204⁽²⁾	614,893	D
Common Stock	05/01/2026		S⁽¹⁾		512	D	$407.3193⁽³⁾	614,381	D
Common Stock	05/01/2026		S⁽¹⁾		584	D	$408.2328⁽⁴⁾	613,797	D
Common Stock	05/01/2026		S⁽¹⁾		546	D	$409.6283⁽⁵⁾	613,251	D
Common Stock	05/01/2026		S⁽¹⁾		920	D	$410.7583⁽⁶⁾	612,331	D
Common Stock	05/01/2026		S⁽¹⁾		680	D	$411.8653⁽⁷⁾	611,651	D
Common Stock	05/01/2026		S⁽¹⁾		5,711	D	$413.1223⁽⁸⁾	605,940	D
Common Stock	05/01/2026		S⁽¹⁾		7,355	D	$413.9192⁽⁹⁾	598,585	D
Common Stock	05/01/2026		S⁽¹⁾		435	D	$415.0157⁽¹⁰⁾	598,150	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

2. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $405.6950 to a high of $406.6800. 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.

3. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $406.8100 to a high of $407.5300. 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.

4. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $407.8150 to a high of $408.5900. 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.

5. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $409.0000 to a high of $409.9900. 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.

6. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $410.1600 to a high of $411.1500. 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.

7. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $411.3750 to a high of $412.3500. 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.

8. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $412.4800 to a high of $413.4750. 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.

9. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $413.4800 to a high of $414.2000. 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.

10. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $414.6700 to a high of $415.4200. 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.

	By: /s/ Sandra Garcia Attorney-in-Fact For: Irving Tan	05/05/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Western Digital (WDC) CEO Irving Tan report in this Form 4?

Irving Tan reported selling 20,000 shares of Western Digital common stock in open‑market trades on May 1, 2026. These transactions were executed under a pre‑arranged Rule 10b5‑1 trading plan and he continues to hold a substantial direct stake.

How many Western Digital (WDC) shares does CEO Irving Tan still own?

After the reported sales, Irving Tan directly holds 598,150 shares of Western Digital common stock. This figure in the Form 4 reflects his remaining direct ownership following the 20,000 shares sold across multiple open‑market transactions on May 1, 2026.

At what prices did Western Digital (WDC) shares sell in Irving Tan’s Form 4?

The Form 4 shows weighted average sale prices generally around $406–$415 per share. Footnotes explain that each reported average covers multiple trades, with individual prices ranging from a low of $405.6950 to a high of $415.4200.

Was Irving Tan’s Western Digital (WDC) stock sale pre‑planned?

Yes. A footnote states the sales were effected under a Rule 10b5‑1 trading plan adopted on May 12, 2025. Such plans allow insiders to schedule trades in advance, helping separate personal trading decisions from day‑to‑day market developments.

How many separate sale transactions did the Western Digital (WDC) Form 4 disclose?

The Form 4 transaction summary reports nine sale transactions, all involving Western Digital common stock. Together, these open‑market sales totaled 20,000 shares sold on May 1, 2026, with detailed weighted average pricing and ranges provided in the accompanying footnotes.