William Yeung Energy Recovery, Inc. (ERII) insider trading activity

William Yeung is Chief Legal Officer of Energy Recovery, Inc.. Currently has a direct ownership of 97,369 shares of ERII, which is worth approximately $1.67 Million. The most recent transaction as insider was on Oct 24, 2025, when has been sold 9,168 shares (Common Stock) at a price of $18.0 per share, resulting in proceeds of $165,024. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 97.4K

2.68% 3M change

14.16% 12M change

Total Value Held $1.67 Million

William Yeung Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Oct 24 2025	SELL Open market or private sale	$165,024 $18.0 p/Share	9,168 Reduced 8.61%	97,369 Common Stock
Oct 24 2025	BUY Exercise of conversion of derivative security	$81,136 $8.85 p/Share	9,168 Added 8.33%	100,899 Common Stock
Oct 23 2025	SELL Open market or private sale	$61,775 $17.5 p/Share	3,530 Reduced 3.5%	97,369 Common Stock
Oct 23 2025	BUY Exercise of conversion of derivative security	$26,475 $7.5 p/Share	3,530 Added 3.38%	100,899 Common Stock
Oct 20 2025	SELL Open market or private sale	$60,010 $17.0 p/Share	3,530 Reduced 3.5%	97,369 Common Stock
Oct 20 2025	BUY Exercise of conversion of derivative security	$26,475 $7.5 p/Share	3,530 Added 3.38%	100,899 Common Stock
Oct 16 2025	SELL Open market or private sale	$58,245 $16.5 p/Share	3,530 Reduced 3.5%	97,369 Common Stock
Oct 16 2025	BUY Exercise of conversion of derivative security	$26,475 $7.5 p/Share	3,530 Added 3.38%	100,899 Common Stock
Oct 03 2025	SELL Open market or private sale	$57,072 $16.0 p/Share	3,567 Reduced 3.53%	97,369 Common Stock
Oct 03 2025	BUY Exercise of conversion of derivative security	$26,752 $7.5 p/Share	3,567 Added 3.45%	99,898 Common Stock
Sep 18 2025	SELL Open market or private sale	$233,200 $15.09 p/Share	15,454 Reduced 13.7%	97,369 Common Stock
Sep 18 2025	BUY Exercise of conversion of derivative security	$138,313 $8.95 p/Share	15,454 Added 12.05%	112,823 Common Stock
Sep 11 2025	SELL Open market or private sale	$486,868 $14.51 p/Share	33,554 Reduced 25.63%	97,369 Common Stock
Sep 11 2025	BUY Exercise of conversion of derivative security	$276,349 $8.95 p/Share	30,877 Added 19.08%	130,923 Common Stock
Jul 25 2025	SELL Payment of exercise price or tax liability	$27,607 $13.88 p/Share	1,989 Reduced 1.95%	100,046 Common Stock
Mar 10 2025	SELL Payment of exercise price or tax liability	$15,453 $16.37 p/Share	944 Reduced 0.92%	102,035 Common Stock
Feb 03 2025	SELL Payment of exercise price or tax liability	$12,647 $14.34 p/Share	882 Reduced 0.85%	102,979 Common Stock
Jan 31 2025	SELL Payment of exercise price or tax liability	$9,129 $14.56 p/Share	627 Reduced 0.6%	103,861 Common Stock
Jan 30 2025	SELL Payment of exercise price or tax liability	$10,002 $14.33 p/Share	698 Reduced 0.66%	104,488 Common Stock
Jan 27 2025	SELL Payment of exercise price or tax liability	$58,478 $14.4 p/Share	4,061 Reduced 3.72%	105,186 Common Stock
Jan 23 2025	BUY Grant, award, or other acquisition	-	23,956 Added 17.98%	109,247 Common Stock
Jul 29 2024	SELL Open market or private sale	$29,435 $14.63 p/Share	2,012 Reduced 2.3%	85,291 Common Stock
Mar 11 2024	SELL Open market or private sale	$14,650 $14.98 p/Share	978 Reduced 1.11%	87,303 Common Stock
Feb 05 2024	SELL Open market or private sale	$15,083 $14.89 p/Share	1,013 Reduced 1.13%	88,281 Common Stock
Feb 02 2024	SELL Open market or private sale	$21,420 $15.3 p/Share	1,400 Reduced 1.54%	89,294 Common Stock

William Yeung

Chief Legal Officer

San Leandro, CA

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