Western Digital (WDC) director sells 3,280 shares under Rule 10b5-1 trading plan

Filing Impact

(High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Western Digital director Cole Martin I reported open-market sales of 3,280 shares of common stock on June 9, 2026. All 30 transactions were sales executed under a pre-arranged Rule 10b5-1 trading plan adopted on March 5, 2026.

The trades were completed at various prices, with footnotes indicating sale prices ranging from a low of $483.99 to a high of $527.60 per share. Following the individual trades, the filing shows Martin’s reported holdings in Western Digital stock remaining in the tens of thousands of shares, so he continues to retain a sizable stake.

Insights

Director Cole Martin I sold 3,280 Western Digital shares in pre-planned trades, while retaining a sizable remaining stake.

The Form 4 shows 30 open-market sale transactions in Western Digital common stock by director Cole Martin I on June 9, 2026, totaling 3,280 shares. All transactions use code S, indicating straightforward sales rather than option exercises, gifts, or tax-related movements.

A key detail is the footnote stating these sales were effected under a Rule 10b5-1 trading plan adopted on March 5, 2026. Such plans are pre-arranged and generally reduce the informational value of trade timing, as execution is automated once conditions are met, rather than being discretionary.

The reported holdings after individual trades remain in the tens of thousands of shares, so the disposed 3,280 shares represent only a portion of Martin’s position. From an investment thesis perspective, these planned sales look like routine portfolio management by a director who still maintains a meaningful ownership stake.

Insider Trade Summary 10b5-1

Net Seller: 3,280 shares ($1,676,600)

Net Sell 30 txns

Insider Cole Martin I

Role null

Sold 3,280 shs ($1.68M)

Type	Security	Shares	Price	Value
Sale	Common Stock	48	$484.2833	$23K
Sale	Common Stock	16	$485.54	$8K
Sale	Common Stock	48	$486.8667	$23K
Sale	Common Stock	16	$488.06	$8K
Sale	Common Stock	38	$491.0595	$19K
Sale	Common Stock	30	$492.3783	$15K
Sale	Common Stock	44	$493.6418	$22K
Sale	Common Stock	32	$494.625	$16K
Sale	Common Stock	48	$497.4667	$24K
Sale	Common Stock	48	$498.9467	$24K
Sale	Common Stock	16	$499.69	$8K
Sale	Common Stock	64	$501.7225	$32K
Sale	Common Stock	128	$502.8702	$64K
Sale	Common Stock	80	$503.802	$40K
Sale	Common Stock	96	$505.5117	$49K
Sale	Common Stock	96	$507.9383	$49K
Sale	Common Stock	32	$509.1606	$16K
Sale	Common Stock	326	$510.6106	$166K
Sale	Common Stock	310	$511.6651	$159K
Sale	Common Stock	316	$513.1445	$162K
Sale	Common Stock	296	$514.0944	$152K
Sale	Common Stock	392	$515.399	$202K
Sale	Common Stock	112	$516.7171	$58K
Sale	Common Stock	216	$517.5896	$112K
Sale	Common Stock	48	$519.2533	$25K
Sale	Common Stock	160	$521.139	$83K
Sale	Common Stock	32	$523.23	$17K
Sale	Common Stock	48	$524.72	$25K
Sale	Common Stock	16	$525.56	$8K
Sale	Common Stock	128	$527.2238	$67K

Holdings After Transaction: Common Stock — 29,385 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 March 5, 2026. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $483.99 to a high of $484.57. 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 $486.54 to a high of $487.31. 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 $490.99 to a high of $491.43. 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 $491.99 to a high of $492.88. 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 $493.02 to a high of $493.99. 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 $494.18 to a high of $495.07. 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 $497.11 to a high of $497.69. 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 $498.49 to a high of $499.18. 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 $501.34 to a high of $502.26. 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 $502.49 to a high of $503.39. 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 $503.52 to a high of $504.05. 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 $504.99 to a high of $505.95. 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 $507.51 to a high of $508.25. 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 $508.67 to a high of $509.38. 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 $510.20 to a high of $511.11. 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 $511.22 to a high of $512.18. 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 $512.66 to a high of $513.65. 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 $513.81 to a high of $514.62. 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 $514.95 to a high of $515.86. 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 $515.99 to a high of $516.91. 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 $517.17 to a high of $518.16. 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 $518.90 to a high of $519.79. 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 $520.76 to a high of $521.59. 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 $522.98 to a high of $523.48. 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 $524.19 to a high of $525.01. 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 $526.82 to a high of $527.60. 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: 3,280 shares Number of sale transactions: 30 trades Lowest reported sale price: $483.99 per share +4 more

7 metrics

Shares sold 3,280 shares Total common stock sold by Cole Martin I on June 9, 2026

Number of sale transactions 30 trades Count of separate open-market sale entries on June 9, 2026

Lowest reported sale price $483.99 per share Low end of price range in weighted-average footnotes

Highest reported sale price $527.60 per share High end of price range in weighted-average footnotes

Net share direction Net sale of 3,280 shares Transaction summary shows net-sell direction

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

Transaction date June 9, 2026 Date all reported sale transactions occurred

Key Terms

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

4 terms

Rule 10b5-1 trading plan regulatory

"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."

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.

Form 4 regulatory

"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."

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.

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Form 4 Insider Transactions: What Each Field Means →

06/11/2026 - 05:47 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^*

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)
06/09/2026

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	06/09/2026		S⁽¹⁾		48	D	$484.2833⁽²⁾	29,385	D
Common Stock	06/09/2026		S⁽¹⁾		16	D	$485.54	29,369	D
Common Stock	06/09/2026		S⁽¹⁾		48	D	$486.8667⁽³⁾	29,321	D
Common Stock	06/09/2026		S⁽¹⁾		16	D	$488.06	29,305	D
Common Stock	06/09/2026		S⁽¹⁾		38	D	$491.0595⁽⁴⁾	29,267	D
Common Stock	06/09/2026		S⁽¹⁾		30	D	$492.3783⁽⁵⁾	29,237	D
Common Stock	06/09/2026		S⁽¹⁾		44	D	$493.6418⁽⁶⁾	29,193	D
Common Stock	06/09/2026		S⁽¹⁾		32	D	$494.625⁽⁷⁾	29,161	D
Common Stock	06/09/2026		S⁽¹⁾		48	D	$497.4667⁽⁸⁾	29,113	D
Common Stock	06/09/2026		S⁽¹⁾		48	D	$498.9467⁽⁹⁾	29,065	D
Common Stock	06/09/2026		S⁽¹⁾		16	D	$499.69	29,049	D
Common Stock	06/09/2026		S⁽¹⁾		64	D	$501.7225⁽¹⁰⁾	28,985	D
Common Stock	06/09/2026		S⁽¹⁾		128	D	$502.8702⁽¹¹⁾	28,857	D
Common Stock	06/09/2026		S⁽¹⁾		80	D	$503.802⁽¹²⁾	28,777	D
Common Stock	06/09/2026		S⁽¹⁾		96	D	$505.5117⁽¹³⁾	28,681	D
Common Stock	06/09/2026		S⁽¹⁾		96	D	$507.9383⁽¹⁴⁾	28,585	D
Common Stock	06/09/2026		S⁽¹⁾		32	D	$509.1606⁽¹⁵⁾	28,553	D
Common Stock	06/09/2026		S⁽¹⁾		326	D	$510.6106⁽¹⁶⁾	28,227	D
Common Stock	06/09/2026		S⁽¹⁾		310	D	$511.6651⁽¹⁷⁾	27,917	D
Common Stock	06/09/2026		S⁽¹⁾		316	D	$513.1445⁽¹⁸⁾	27,601	D
Common Stock	06/09/2026		S⁽¹⁾		296	D	$514.0944⁽¹⁹⁾	27,305	D
Common Stock	06/09/2026		S⁽¹⁾		392	D	$515.399⁽²⁰⁾	26,913	D
Common Stock	06/09/2026		S⁽¹⁾		112	D	$516.7171⁽²¹⁾	26,801	D
Common Stock	06/09/2026		S⁽¹⁾		216	D	$517.5896⁽²²⁾	26,585	D
Common Stock	06/09/2026		S⁽¹⁾		48	D	$519.2533⁽²³⁾	26,537	D
Common Stock	06/09/2026		S⁽¹⁾		160	D	$521.139⁽²⁴⁾	26,377	D
Common Stock	06/09/2026		S⁽¹⁾		32	D	$523.23⁽²⁵⁾	26,345	D
Common Stock	06/09/2026		S⁽¹⁾		48	D	$524.72⁽²⁶⁾	26,297	D
Common Stock	06/09/2026		S⁽¹⁾		16	D	$525.56	26,281	D
Common Stock	06/09/2026		S⁽¹⁾		128	D	$527.2238⁽²⁷⁾	26,153	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 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 $483.99 to a high of $484.57. 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 $486.54 to a high of $487.31. 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 $490.99 to a high of $491.43. 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 $491.99 to a high of $492.88. 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 $493.02 to a high of $493.99. 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 $494.18 to a high of $495.07. 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 $497.11 to a high of $497.69. 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 $498.49 to a high of $499.18. 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 $501.34 to a high of $502.26. 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 $502.49 to a high of $503.39. 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 $503.52 to a high of $504.05. 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 $504.99 to a high of $505.95. 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.

14. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $507.51 to a high of $508.25. 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.

15. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $508.67 to a high of $509.38. 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.

16. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $510.20 to a high of $511.11. 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.

17. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $511.22 to a high of $512.18. 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.

18. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $512.66 to a high of $513.65. 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.

19. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $513.81 to a high of $514.62. 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.

20. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $514.95 to a high of $515.86. 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.

21. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $515.99 to a high of $516.91. 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.

22. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $517.17 to a high of $518.16. 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.

23. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $518.90 to a high of $519.79. 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.

24. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $520.76 to a high of $521.59. 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.

25. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $522.98 to a high of $523.48. 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.

26. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $524.19 to a high of $525.01. 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.

27. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $526.82 to a high of $527.60. 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	06/11/2026
	** 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 insider transactions did Western Digital (WDC) disclose for Cole Martin I?

Western Digital reported that director Cole Martin I sold 3,280 shares of common stock in 30 open-market transactions on June 9, 2026. The filing shows these trades as routine sales rather than option exercises or gifts, all coded as open-market sales.

At what prices did Cole Martin I sell Western Digital (WDC) shares?

Cole Martin I’s Western Digital share sales occurred across a price range from $483.99 to $527.60 per share. Footnotes describe these as weighted-average prices for multiple trades executed within narrower bands throughout the trading day.

Was Cole Martin I’s sale of Western Digital (WDC) shares under a Rule 10b5-1 plan?

Yes. A footnote states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on March 5, 2026. Such pre-arranged plans automate trading once conditions are met, reducing the significance of the exact sale timing as a market signal.

How many Western Digital (WDC) shares did Cole Martin I sell in total?

According to the Form 4 transaction summary, Cole Martin I sold 3,280 shares of Western Digital common stock. These were executed as 30 separate open-market sale transactions on June 9, 2026, all reported as non-derivative sales of common stock.

Does Cole Martin I still hold Western Digital (WDC) shares after these sales?

Yes. The Form 4 lists share balances following individual trades in the tens of thousands of shares. While exact starting and ending totals are not consolidated, the data shows that Cole Martin I continues to hold a significant Western Digital equity position after the reported sales.

What does the Form 4 for Western Digital (WDC) indicate about transaction type?

Every reported transaction is coded “S,” indicating open-market or private sale of common stock. There are no option exercises, gifts, or tax-withholding entries, so the filing reflects straightforward stock sales rather than derivative exercises or compensation-related events.