Cynthia L Tregillis Western Digital Corp (WDC) insider trading activity

Cynthia L Tregillis is Chief Legal Officer & Corp Sec of WESTERN DIGITAL CORP. Currently has a direct ownership of 149,575 shares of WDC, which is worth approximately $22.5 Million. The most recent transaction as insider was on Oct 20, 2025, when has been sold 1,307 shares (Common Stock) at a price of $121.53 per share, resulting in proceeds of $158,839. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 150K

4.35% 3M change

n/a 12M change

Total Value Held $22.5 Million

Cynthia L Tregillis Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Oct 20 2025	SELL Payment of exercise price or tax liability	$158,839 $121.53 p/Share	1,307 Reduced 0.87%	149,575 Common Stock
Oct 20 2025	BUY Exercise of conversion of derivative security	-	8 Added 0.01%	150,882 Common Stock
Aug 27 2025	SELL Payment of exercise price or tax liability	$21,458 $80.67 p/Share	266 Reduced 0.18%	150,874 Common Stock
Aug 27 2025	BUY Exercise of conversion of derivative security	-	1 Added 0.0%	151,140 Common Stock
Aug 26 2025	BUY Grant, award, or other acquisition	-	16,554 Added 9.87%	151,139 Common Stock
Aug 25 2025	SELL Payment of exercise price or tax liability	$60,920 $79.22 p/Share	769 Reduced 0.57%	134,585 Common Stock
Aug 25 2025	BUY Exercise of conversion of derivative security	-	3 Added 0.0%	135,354 Common Stock
Aug 22 2025	SELL Open market or private sale	$1,051,930 $74.78 p/Share	14,067 Reduced 9.41%	135,351 Common Stock
Aug 21 2025	SELL Payment of exercise price or tax liability	$330,594 $74.66 p/Share	4,428 Reduced 2.88%	149,418 Common Stock
Aug 21 2025	BUY Exercise of conversion of derivative security	-	18 Added 0.01%	153,846 Common Stock
Aug 20 2025	SELL Payment of exercise price or tax liability	$194,016 $75.64 p/Share	2,565 Reduced 1.64%	153,828 Common Stock
Aug 20 2025	BUY Exercise of conversion of derivative security	-	10 Added 0.01%	156,393 Common Stock
Jul 20 2025	SELL Payment of exercise price or tax liability	$88,808 $68.0 p/Share	1,306 Reduced 0.83%	156,383 Common Stock
Jul 20 2025	BUY Exercise of conversion of derivative security	-	5 Added 0.0%	157,689 Common Stock
Jun 20 2025	SELL Payment of exercise price or tax liability	$12,095 $59.29 p/Share	204 Reduced 0.13%	157,684 Common Stock
Jun 20 2025	BUY Exercise of conversion of derivative security	-	0 Added 0.0%	157,888 Common Stock
May 27 2025	SELL Payment of exercise price or tax liability	$13,835 $51.82 p/Share	267 Reduced 0.17%	157,661 Common Stock
May 25 2025	SELL Payment of exercise price or tax liability	$38,538 $50.18 p/Share	768 Reduced 0.48%	157,928 Common Stock
May 20 2025	SELL Payment of exercise price or tax liability	$19,188 $50.63 p/Share	379 Reduced 0.24%	158,696 Common Stock
Apr 20 2025	SELL Payment of exercise price or tax liability	$42,789 $36.51 p/Share	1,172 Reduced 0.73%	159,075 Common Stock
Mar 06 2025	SELL Payment of exercise price or tax liability	$36,268 $41.45 p/Share	875 Reduced 0.54%	160,247 Common Stock
Mar 03 2025	BUY Grant, award, or other acquisition	-	21,272 Added 11.66%	161,122 Common Stock

CLT

Cynthia L Tregillis

Chief Legal Officer & Corp Sec

San Jose, CA

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