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CIK 0000106040 · Large accelerated filer

WESTERN DIGITAL CORP

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Ticker
WDC
Exchange
Nasdaq
Industry
Computer Storage Devices
FY end
Jul 3
Incorporated
DE
Entity type
operating
EIN
330956711
Phone
408-717-6000
Business address
5601 GREAT OAKS PARKWAY, SAN JOSE, CA, 95119
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$6,541,831
in 7 filings, $3.2M under 10b5-1 plans

Net −$6,541,831. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2025-08-25 Zamiska Gene M. SVP & Princ. Acctg Officer Shares withheld for taxes 10b5-1 −798 $79.22 $63K 28,936
2025-08-25 Zamiska Gene M. SVP & Princ. Acctg Officer Option exercise · Dividend Equivalent Rights 10b5-1 −2.72 47.54
2025-08-25 Tregillis Cynthia L Chief Legal Officer & Corp Sec Option exercise +3 135,354
2025-08-25 Tregillis Cynthia L Chief Legal Officer & Corp Sec Shares withheld for taxes −769 $79.22 $61K 134,585
2025-08-25 Tregillis Cynthia L Chief Legal Officer & Corp Sec Option exercise · Dividend Equivalent Rights −3.3 182.95
2025-08-25 Tan Irving Chief Executive Officer Option exercise +13 592,297
2025-08-25 Tan Irving Chief Executive Officer Shares withheld for taxes −247 $79.22 $20K 592,050
2025-08-25 Tan Irving Chief Executive Officer Option exercise · Dividend Equivalent Rights −13.6 528.97
2025-08-25 Gubbi Vidyadhara K Chief of Global Operations Option exercise +3 147,932
2025-08-25 Gubbi Vidyadhara K Chief of Global Operations Shares withheld for taxes −1,140 $79.22 $90K 146,792
2025-08-25 Gubbi Vidyadhara K Chief of Global Operations Option exercise · Dividend Equivalent Rights −3.88 156.29
2025-08-25 Davis Brian Scott Chief Sales & Mrktg Officer Option exercise +3 124,137
2025-08-25 Davis Brian Scott Chief Sales & Mrktg Officer Shares withheld for taxes −969 $79.22 $77K 123,168
2025-08-25 Davis Brian Scott Chief Sales & Mrktg Officer Option exercise · Dividend Equivalent Rights −3.3 120.64
2025-08-22 Zamiska Gene M. SVP, Global Accounting & Chief Sale 10b5-1 −1,828 $74.78 $137K 29,732
2025-08-22 Tregillis Cynthia L Chief Legal Officer & Corp Sec Sale 10b5-1 −14,067 $74.78 $1.1M 135,351
2025-08-21 Zamiska Gene M. SVP, Global Accounting & Chief Option exercise 10b5-1 +6 36,517
2025-08-21 Zamiska Gene M. SVP, Global Accounting & Chief Shares withheld for taxes 10b5-1 −1,797 $74.66 $134K 34,720
2025-08-21 Zamiska Gene M. SVP, Global Accounting & Chief Sale 10b5-1 −3,160 $75.68 $239K 31,560
2025-08-21 Zamiska Gene M. SVP, Global Accounting & Chief Option exercise · Dividend Equivalent Rights 10b5-1 −6.11 50.26

Page 32 of 42 · 821 trades