Western Digital (WDC) director completes 192-share Rule 10b5-1 stock sale

Q: What insider transaction did Western Digital (WDC) disclose in this Form 4?

Western Digital director Cole Martin I disclosed selling 192 shares of common stock on July 28, 2026 . The sales were reported as two separate non-derivative transactions under a pre-arranged Rule 10b5-1 trading plan .

Q: How many Western Digital (WDC) shares did Cole Martin I sell and at what prices?

Cole Martin I sold 160 shares at a weighted average price of $462.3013 and 32 shares at $465.1231 . Footnotes state these were multiple trades within price ranges of $462.03–$462.50 and $465.04–$465.21 , respectively.

Q: Was the WDC insider sale by Cole Martin I made under a Rule 10b5-1 trading plan?

Yes. A footnote states the sales were effected under a Rule 10b5-1 trading plan adopted by Cole Martin I on March 5, 2026 . Such plans pre-arrange trade parameters, reducing the significance of trade timing as an information signal.

Q: What is the total number of Western Digital (WDC) shares sold in this Form 4 continuation?

This continuation filing reports sales totaling 192 shares of Western Digital common stock: 160 shares in one transaction and 32 shares in another. A footnote explains this Form 4 continues a prior Form 4 for the same trade date.

Q: What does it mean that this Western Digital (WDC) Form 4 is a continuation filing?

A footnote explains that, due to SEC rules limiting the number of transactions per Form 4, this report is a continuation of another Form 4 filed for the same date. Together, the forms cover all trades executed that day.

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Western Digital Corp director Cole Martin I reported selling 192 shares of common stock on July 28, 2026, in two transactions at weighted average prices of $462.3013 for 160 shares and $465.1231 for 32 shares. The sales were effected under a pre-arranged Rule 10b5-1 trading plan adopted on March 5, 2026, and this report is a continuation of another Form 4 filed for the same date.

Insider Trade Summary 10b5-1

Net Seller: 192 shares

Net Sell 2 txns

Insider Cole Martin I

Role Director

Sold 192 shs ($89K)

Type	Security	Shares	Price	Value
Sale	Common Stock ^{F1, F2, F3}	160	$462.3013	$74K
Sale	Common Stock ^{F2, F4}	32	$465.1231	$15K

Holdings After Transaction: Common Stock — 21,433 shares (Direct)

Footnotes (4)

F1. Due to SEC rules limiting the number of transactions that can be reported on a single Form 4, this Form 4 is a continuation of the Form 4 filed for the same date listed above.
F2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2026.
F3. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $462.03 to a high of $462.50. 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.
F4. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $465.04 to a high of $465.21. 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

Total shares sold: 192 shares First transaction shares: 160 shares First transaction weighted average price: $462.3013 +5 more

8 metrics

Total shares sold 192 shares Aggregate common shares sold by Cole Martin I on July 28, 2026 across two transactions

First transaction shares 160 shares Portion of the 192 shares sold in the first reported transaction on July 28, 2026

First transaction weighted average price $462.3013 Weighted average sale price per share for the 160-share transaction

First transaction price range $462.03 to $462.50 Range of individual trade prices in the 160-share sale, from low to high

Second transaction shares 32 shares Portion of the 192 shares sold in the second reported transaction on July 28, 2026

Second transaction weighted average price $465.1231 Weighted average sale price per share for the 32-share transaction

Second transaction price range $465.04 to $465.21 Range of individual trade prices in the 32-share sale, from low to high

Rule 10b5-1 plan adoption date March 5, 2026 Date on which Cole Martin I adopted the Rule 10b5-1 trading plan referenced in the sale footnote

Key Terms

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

3 terms

Rule 10b5-1 trading plan regulatory

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

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.

Form 4 regulatory

"this Form 4 is a continuation of the Form 4 filed for the same date"

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.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/29/2026 - 07:32 PM Accepted by SEC EDGAR 07/29/2026 - 07:32 PM

FAQ

What insider transaction did Western Digital (WDC) disclose in this Form 4?

Western Digital director Cole Martin I disclosed selling 192 shares of common stock on July 28, 2026. The sales were reported as two separate non-derivative transactions under a pre-arranged Rule 10b5-1 trading plan.

How many Western Digital (WDC) shares did Cole Martin I sell and at what prices?

Cole Martin I sold 160 shares at a weighted average price of $462.3013 and 32 shares at $465.1231. Footnotes state these were multiple trades within price ranges of $462.03–$462.50 and $465.04–$465.21, respectively.

Was the WDC insider sale by Cole Martin I made under a Rule 10b5-1 trading plan?

Yes. A footnote states the sales were effected under a Rule 10b5-1 trading plan adopted by Cole Martin I on March 5, 2026. Such plans pre-arrange trade parameters, reducing the significance of trade timing as an information signal.

What is the total number of Western Digital (WDC) shares sold in this Form 4 continuation?

This continuation filing reports sales totaling 192 shares of Western Digital common stock: 160 shares in one transaction and 32 shares in another. A footnote explains this Form 4 continues a prior Form 4 for the same trade date.

What does it mean that this Western Digital (WDC) Form 4 is a continuation filing?

A footnote explains that, due to SEC rules limiting the number of transactions per Form 4, this report is a continuation of another Form 4 filed for the same date. Together, the forms cover all trades executed that day.

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^*

Cole Martin I

(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)
07/28/2026

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⁽¹⁾	07/28/2026		S⁽²⁾		160	D	$462.3013⁽³⁾	21,465	D
Common Stock	07/28/2026		S⁽²⁾		32	D	$465.1231⁽⁴⁾	21,433	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. Due to SEC rules limiting the number of transactions that can be reported on a single Form 4, this Form 4 is a continuation of the Form 4 filed for the same date listed above.

2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 5, 2026.

3. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $462.03 to a high of $462.50. 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 $465.04 to a high of $465.21. 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: Martin Cole	07/29/2026
	** 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