SEC Form 4 · accession 0001266824-26-000199
WESTERN DIGITAL CORP · WDC
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Cynthia L Tregillis
Officer — Chief Legal Officer & Corp Sec
Period of report
Sep 3, 2026
Accepted (ET)
Sep 8, 2026 · 8:13 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0000106040
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Sep 3, 2026 | M | 7 | $0.00 | A | 112,162 | D | |
| Common StockF2 | Sep 3, 2026 | F | 700 | $441.57 | D | 111,462 | D | |
| Common Stock | Sep 4, 2026 | S | 432 | $451.20 | D | 111,030 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend Equivalent RightsF1 | — | Sep 3, 2026 | M | 7 | D | — | — | Common Stock | 7 | 270 | D |
Explanation of responses
- F1The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.
- F2Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).
- F3The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2026.