Western Digital director Martin I. Cole sells 4,000 shares

The 12 reported sale tranches list weighted average prices from $390.0406 to $401.4675 per share.

Available on EDGAR 10/30/2026 - 06:19 PM EDT Accepted by SEC EDGAR 10/30/2026 - 06:19 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Western Digital Corp. (WDC) director Martin I. Cole sold 4,000 shares of common stock in 12 transactions on October 29, 2026. The reported weighted average sale prices ranged from $390.0406 to $401.4675 per share. The sales were made pursuant to a Rule 10b5-1 trading plan adopted March 5, 2026.

Insider Trade Summary 10b5-1

Net Seller: 4,000 shares

Net Sell 12 txns

Insider Cole Martin I

Role Director

Sold 4,000 shs ($1.58M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	204	$390.0406	$80K
Sale	Common Stock F1, F3	385	$391.0458	$151K
Sale	Common Stock F1, F4	407	$392.4181	$160K
Sale	Common Stock F1, F5	494	$393.2193	$194K
Sale	Common Stock F1, F6	243	$394.4098	$96K
Sale	Common Stock F1, F7	209	$395.3043	$83K
Sale	Common Stock F1, F8	317	$396.3138	$126K
Sale	Common Stock F1, F9	584	$397.4792	$232K
Sale	Common Stock F1, F10	723	$398.4499	$288K
Sale	Common Stock F1, F11	303	$399.3569	$121K
Sale	Common Stock F1, F12	88	$400.3294	$35K
Sale	Common Stock F1, F13	43	$401.4675	$17K

Holdings After Transaction: Common Stock — 17,433 shares (Direct)

Footnotes (13)

1. F1. 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.
2. F2. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $389.6074 to a high of $390.5492. 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. F3. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $390.8463 to a high of $391.8300. 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. F4. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $391.8473 to a high of $392.8400. 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. F5. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $392.8499 to a high of $393.7911. 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. F6. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $393.8700 to a high of $394.8682. 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. F7. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $394.8900 to a high of $395.8721. 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. F8. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $395.9300 to a high of $396.9100. 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. F9. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $396.9333 to a high of $397.9274. 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. F10. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $397.9343 to a high of $398.9000. 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.
11. F11. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $398.9400 to a high of $399.9200. 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.
12. F12. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $399.9563 to a high of $400.9500. 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.
13. F13. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $401.0000 to a high of $401.8100. 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: 4,000 shares Sale transactions: 12 transactions Weighted average sale prices: $390.0406–$401.4675 per share +1 more

4 metrics

Shares sold 4,000 shares Common Stock sold October 29, 2026

Sale transactions 12 transactions October 29, 2026

Weighted average sale prices $390.0406–$401.4675 per share Reported prices across the sale tranches on October 29, 2026

Trading plan adoption date March 5, 2026 Rule 10b5-1 trading plan

Key Terms

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

2 terms

Rule 10b5-1 trading plan regulatory

"pursuant to a Rule 10b5-1 trading plan adopted"

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.

weighted average sale price per share financial

"Represents the weighted average sale price per share"

FAQ

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How many WDC shares did Martin I. Cole sell, and at what prices?

Martin I. Cole, a director of Western Digital Corp., sold 4,000 common shares in 12 transactions on October 29, 2026. The reported weighted average prices ranged from $390.0406 to $401.4675 per share; the sales were made pursuant to a Rule 10b5-1 trading plan adopted March 5, 2026.

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

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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).

X

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)
10/29/2026

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
Common Stock	10/29/2026		S(1)		204	D	$390.0406(2)	21,229	D
Common Stock	10/29/2026		S(1)		385	D	$391.0458(3)	20,844	D
Common Stock	10/29/2026		S(1)		407	D	$392.4181(4)	20,437	D
Common Stock	10/29/2026		S(1)		494	D	$393.2193(5)	19,943	D
Common Stock	10/29/2026		S(1)		243	D	$394.4098(6)	19,700	D
Common Stock	10/29/2026		S(1)		209	D	$395.3043(7)	19,491	D
Common Stock	10/29/2026		S(1)		317	D	$396.3138(8)	19,174	D
Common Stock	10/29/2026		S(1)		584	D	$397.4792(9)	18,590	D
Common Stock	10/29/2026		S(1)		723	D	$398.4499(10)	17,867	D
Common Stock	10/29/2026		S(1)		303	D	$399.3569(11)	17,564	D
Common Stock	10/29/2026		S(1)		88	D	$400.3294(12)	17,476	D
Common Stock	10/29/2026		S(1)		43	D	$401.4675(13)	17,433	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

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 March 5, 2026.

2. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $389.6074 to a high of $390.5492. 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 $390.8463 to a high of $391.8300. 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 $391.8473 to a high of $392.8400. 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 $392.8499 to a high of $393.7911. 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 $393.8700 to a high of $394.8682. 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 $394.8900 to a high of $395.8721. 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 $395.9300 to a high of $396.9100. 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 $396.9333 to a high of $397.9274. 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 $397.9343 to a high of $398.9000. 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.

11. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $398.9400 to a high of $399.9200. 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.

12. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $399.9563 to a high of $400.9500. 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.

13. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $401.0000 to a high of $401.8100. 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	10/30/2026
	** 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)