William Yeung

ERII

William Yeung serves as officer: Chief Legal Officer at Energy Recovery, Inc. (ERII). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

26 trades

$3.18M

Net Position

Net Seller

$3.18M

Companies Traded

ERII

Active Period

Feb 2022 – Feb 2026

26 total trades

Most Recent

Sell ERII

Feb 9, 2026 · $22.8K

William Yeung's Insider Trading at Energy Recovery, Inc. (ERII)

Buys

0 · $0.00

Sells

26 · $3.18M

Total Shares Bought

Total Shares Sold

171,306

ERII Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Feb 9, 2026↗	Sell	1,536	$14.82	$22.8K	78,854
Feb 5, 2026↗	Sell	1,536	$14.82	$22.8K	78,854
Feb 3, 2026↗	Sell	8,000	$14.54	$116.3K	90,098
Jan 28, 2026↗	Sell	17,625	$14.43	$254.3K	90,098
Oct 23, 2025↗	Sell	12,698	$17.86	$226.8K	97,369
Oct 20, 2025↗	Sell	3,530	$17.00	$60.0K	97,369
Oct 16, 2025↗	Sell	3,530	$16.50	$58.2K	97,369
Oct 3, 2025↗	Sell	3,567	$16.00	$57.1K	97,369
Sep 18, 2025↗	Sell	15,454	$15.09	$233.1K	97,369
Sep 11, 2025↗	Sell	33,554	$14.51	$486.9K	97,369
Jul 25, 2025↗	Sell	1,989	$13.88	$27.6K	100,046
Mar 10, 2025↗	Sell	944	$16.37	$15.5K	102,035
Feb 3, 2025↗	Sell	882	$14.34	$12.6K	102,979
Jan 30, 2025↗	Sell	1,325	$14.44	$19.1K	104,488
Jan 27, 2025↗	Sell	4,061	$14.40	$58.5K	105,186
Jul 29, 2024↗	Sell	2,012	$14.63	$29.4K	85,291
Mar 11, 2024↗	Sell	978	$14.98	$14.7K	87,303
Feb 5, 2024↗	Sell	1,013	$14.89	$15.1K	88,281
Feb 1, 2024↗	Sell	2,133	$15.42	$32.9K	90,694
Jan 30, 2024↗	Sell	823	$15.91	$13.1K	91,427
Aug 28, 2023↗	Sell	40,614	$27.75	$1.13M	52,708
Mar 9, 2023↗	Sell	882	$23.99	$21.2K	76,648
Feb 3, 2023↗	Sell	836	$22.75	$19.0K	77,530
Feb 1, 2023↗	Sell	3,707	$22.41	$83.1K	81,279
Jun 15, 2022↗	Sell	2,500	$19.07	$47.7K	5,568
Feb 1, 2022↗	Sell	5,577	$19.60	$109.3K	69,601