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

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

Western Digital Corp (WDC) Chief Executive Officer and director Irving Tan reported open-market sales of 20,000 shares of common stock on 2026-08-11, executed in seven separate transactions. The sales, at weighted average prices ranging from lows of $440.77 to highs of $447.88 per share, were carried out under a Rule 10b5-1 trading plan adopted on February 5, 2026.

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Insider Tan Irving
Role Chief Executive Officer
Sold 20,000 shs ($8.90M)
Type Security Shares Price Value
Sale Common Stock F1, F2 2,478 $441.4838 $1.09M
Sale Common Stock F1, F3 989 $442.2155 $437K
Sale Common Stock F1, F4 1,840 $443.3465 $816K
Sale Common Stock F1, F5 1,880 $444.6745 $836K
Sale Common Stock F1, F6 4,822 $445.4508 $2.15M
Sale Common Stock F1, F7 6,445 $446.3812 $2.88M
Sale Common Stock F1, F8 1,546 $447.1831 $691K
Holdings After Transaction: Common Stock — 575,966 shares (Direct)
Footnotes (8)
  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 February 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 $440.77 to a high of $441.66. 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 $441.94 to a high of $442.73. 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 $443.00 to a high of $443.91. 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.
  5. F5. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $444.00 to a high of $444.94. 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 $445.00 to a high of $445.99. 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. F7. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $446.00 to a high of $446.99. 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.
  8. F8. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $447.00 to a high of $447.88. 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.
Total shares sold 20,000 shares Aggregate common shares sold by Irving Tan on 2026-08-11
Number of sale transactions 7 Non-derivative sale transactions reported for 2026-08-11
Weighted average price example $441.4838 per share One reported weighted average sale price for 2,478 shares
Highest price range high $447.88 per share High end of price range for one sale tranche on 2026-08-11
Lowest price range low $440.77 per share Low end of price range for one sale tranche on 2026-08-11
Net buy/sell shares -20,000 shares Net share change from reported transactions in this Form 4
Rule 10b5-1 plan adoption date February 5, 2026 Adoption date of trading plan governing the reported sales
Rule 10b5-1 trading plan financial
"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.
weighted average sale price per share financial
"Represents the weighted average sale price per share. These shares were sold in multiple transactions"
multiple transactions financial
"These shares were sold in multiple transactions at prices ranging from a low to a high"

FAQ

What insider transaction did Western Digital (WDC) report for Irving Tan?
Western Digital reported that CEO Irving Tan sold 20,000 shares of common stock on 2026-08-11 in seven open-market transactions at various weighted average prices between $440.77 and $447.88 per share.

Was the Western Digital (WDC) CEO’s share sale under a Rule 10b5-1 plan?
Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by CEO Irving Tan on February 5, 2026, indicating the trades were pre-arranged rather than decided at the time of execution.

How many Western Digital (WDC) share sale transactions did Irving Tan execute?
Irving Tan executed seven non-derivative sale transactions on 2026-08-11, each reported separately with its own weighted average sale price per share and detailed intraday price ranges for the underlying individual trades.

What price range did the Western Digital (WDC) CEO’s share sales cover?
Across all seven transactions, the CEO’s sales occurred at prices from a low of $440.77 per share to a high of $447.88 per share, with each line item disclosing a specific weighted average sale price within that overall range.

How many Western Digital (WDC) shares in total were sold according to this Form 4?
The transaction summary reports that Irving Tan sold a total of 20,000 shares of Western Digital common stock on 2026-08-11, with no reported share purchases, option exercises, gifts, or derivative transactions in this filing.

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Form 4 Insider Transactions: What Each Field Means →
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).
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*
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)
08/11/2026		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 Stock08/11/2026S(1)2,478D$441.4838(2)593,488D
Common Stock08/11/2026S(1)989D$442.2155(3)592,499D
Common Stock08/11/2026S(1)1,840D$443.3465(4)590,659D
Common Stock08/11/2026S(1)1,880D$444.6745(5)588,779D
Common Stock08/11/2026S(1)4,822D$445.4508(6)583,957D
Common Stock08/11/2026S(1)6,445D$446.3812(7)577,512D
Common Stock08/11/2026S(1)1,546D$447.1831(8)575,966D
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
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 February 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 $440.77 to a high of $441.66. 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 $441.94 to a high of $442.73. 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 $443.00 to a high of $443.91. 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.
5. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $444.00 to a high of $444.94. 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 $445.00 to a high of $445.99. 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 $446.00 to a high of $446.99. 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.
8. Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $447.00 to a high of $447.88. 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.
By: /s/ Sandra Garcia Attorney-in-Fact For: Irving Tan08/12/2026
** 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)

Source: View Original Filing on SEC EDGAR