InsiderFlow

ERII

Energy Recovery, Inc.$11.10+0.05 (+0.45%)
Prev Close$11.05·MCap$595.9M·P/E25.81·Vol399.1K·Yield

Buys (12M)

2

$102.8K

Sells (12M)

23

$5.85M

Net Activity

Net Seller

$5.75M

Active Insiders

9

last 12 mo

Over the past 12 months, insider activity at Energy Recovery, Inc. (ERII) has been dominated by selling, with 2 insider purchases totaling $102.8K and 23 insider sales totaling $5.85M. The most recent insider transaction was by Hanstveit Arve (director), who sold $24.9K worth of shares on Apr 8, 2026. Energy Recovery, Inc. operates in the Industrials sector, within the Industrial - Pollution & Treatment Controls industry, with a market cap of $595.9M.

ERII Insider Trading Activity

DateInsiderTypeValue
Apr 8, 2026 Hanstveit ArveSell$24.9K
Apr 6, 2026 Hanstveit ArveSell$1.68M
Mar 11, 2026 Hanstveit ArveSell$274.0K
Mar 9, 2026 Hanstveit ArveSell$534.4K
Mar 6, 2026 Clemente RodneySell$218.3K
Mar 6, 2026 Ramanan NatarajanSell$2.9K
Feb 5, 2026 Clemente RodneySell$10.6K
Feb 5, 2026 Yeung WilliamSell$22.8K
Jan 30, 2026 Clemente RodneySell$130.2K
Jan 30, 2026 Hostetler MatthewSell$48.0K
Jan 30, 2026 Mancini Michael S.Sell$68.6K
Jan 30, 2026 Moon David WSell$245.4K
Jan 28, 2026 Yeung WilliamSell$254.3K
Dec 4, 2025 Hanstveit ArveSell$445.1K
Oct 23, 2025 Yeung WilliamSell$226.8K
Oct 20, 2025 Yeung WilliamSell$60.0K
Oct 16, 2025 Yeung WilliamSell$58.2K
Oct 3, 2025 Yeung WilliamSell$57.1K
Sep 18, 2025 Yeung WilliamSell$233.1K
Sep 11, 2025 Yeung WilliamSell$486.9K
Jul 25, 2025 Clemente RodneySell$107.5K
Jul 25, 2025 Yeung WilliamSell$27.6K
Jun 11, 2025 Hanstveit ArveSell$635.4K
May 14, 2025 TONDREAU PAMELA L.Buy$51.6K
May 13, 2025 Moon David WBuy$51.2K
Mar 11, 2025 Hanstveit ArveSell$817.0K
Mar 10, 2025 Clemente RodneySell$42.9K
Mar 10, 2025 Yeung WilliamSell$15.5K
Feb 20, 2025 Clemente RodneySell$330.7K
Feb 3, 2025 Clemente RodneySell$13.5K
Feb 3, 2025 Ghasripoor FarshadSell$20.4K
Feb 3, 2025 Yeung WilliamSell$12.6K
Jan 30, 2025 Clemente RodneySell$18.9K
Jan 30, 2025 Ghasripoor FarshadSell$28.3K
Jan 30, 2025 Yeung WilliamSell$19.1K
Jan 27, 2025 Clemente RodneySell$83.3K
Jan 27, 2025 Ghasripoor FarshadSell$82.4K
Jan 27, 2025 Moon David WSell$110.4K
Jan 27, 2025 Yeung WilliamSell$58.5K
Dec 11, 2024 Hanstveit ArveSell$337.4K
Nov 7, 2024 Clemente RodneySell$549.9K
Oct 28, 2024 Clemente RodneySell$116.9K
Oct 28, 2024 Ghasripoor FarshadSell$189.1K
Oct 28, 2024 Moon David WSell$45.8K
Aug 5, 2024 Moon David WBuy$48.0K
Jul 29, 2024 Clemente RodneySell$34.4K
Jul 29, 2024 Ghasripoor FarshadSell$59.7K
Jul 29, 2024 Yeung WilliamSell$29.4K
Jun 18, 2024 Moon David WSell$15.6K
Jun 6, 2024 Hanstveit ArveSell$263.9K
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ERII Insider Buying Activity

The following table shows recent insider purchases of Energy Recovery, Inc. (ERII) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
May 14, 2025 TONDREAU PAMELA L.Buy$51.6K
May 13, 2025 Moon David WBuy$51.2K
Aug 5, 2024 Moon David WBuy$48.0K

ERII Insider Selling Activity

The following table shows recent insider sales of Energy Recovery, Inc. (ERII) stock reported via SEC Form 4 filings.

DateInsiderTypeValue
Apr 8, 2026 Hanstveit ArveSell$24.9K
Apr 6, 2026 Hanstveit ArveSell$1.68M
Mar 11, 2026 Hanstveit ArveSell$274.0K
Mar 9, 2026 Hanstveit ArveSell$534.4K
Mar 6, 2026 Clemente RodneySell$218.3K
Mar 6, 2026 Ramanan NatarajanSell$2.9K
Feb 5, 2026 Clemente RodneySell$10.6K
Feb 5, 2026 Yeung WilliamSell$22.8K
Jan 30, 2026 Clemente RodneySell$130.2K
Jan 30, 2026 Hostetler MatthewSell$48.0K
Jan 30, 2026 Mancini Michael S.Sell$68.6K
Jan 30, 2026 Moon David WSell$245.4K
Jan 28, 2026 Yeung WilliamSell$254.3K
Dec 4, 2025 Hanstveit ArveSell$445.1K
Oct 23, 2025 Yeung WilliamSell$226.8K
Oct 20, 2025 Yeung WilliamSell$60.0K
Oct 16, 2025 Yeung WilliamSell$58.2K
Oct 3, 2025 Yeung WilliamSell$57.1K
Sep 18, 2025 Yeung WilliamSell$233.1K
Sep 11, 2025 Yeung WilliamSell$486.9K
Jul 25, 2025 Clemente RodneySell$107.5K
Jul 25, 2025 Yeung WilliamSell$27.6K
Jun 11, 2025 Hanstveit ArveSell$635.4K
Mar 11, 2025 Hanstveit ArveSell$817.0K
Mar 10, 2025 Clemente RodneySell$42.9K
Mar 10, 2025 Yeung WilliamSell$15.5K
Feb 20, 2025 Clemente RodneySell$330.7K
Feb 3, 2025 Clemente RodneySell$13.5K
Feb 3, 2025 Ghasripoor FarshadSell$20.4K
Feb 3, 2025 Yeung WilliamSell$12.6K
Jan 30, 2025 Clemente RodneySell$18.9K
Jan 30, 2025 Ghasripoor FarshadSell$28.3K
Jan 30, 2025 Yeung WilliamSell$19.1K
Jan 27, 2025 Clemente RodneySell$83.3K
Jan 27, 2025 Ghasripoor FarshadSell$82.4K
Jan 27, 2025 Moon David WSell$110.4K
Jan 27, 2025 Yeung WilliamSell$58.5K
Dec 11, 2024 Hanstveit ArveSell$337.4K
Nov 7, 2024 Clemente RodneySell$549.9K
Oct 28, 2024 Clemente RodneySell$116.9K
Oct 28, 2024 Ghasripoor FarshadSell$189.1K
Oct 28, 2024 Moon David WSell$45.8K
Jul 29, 2024 Clemente RodneySell$34.4K
Jul 29, 2024 Ghasripoor FarshadSell$59.7K
Jul 29, 2024 Yeung WilliamSell$29.4K
Jun 18, 2024 Moon David WSell$15.6K
Jun 6, 2024 Hanstveit ArveSell$263.9K

ERII Insiders

Hanstveit Arve

Director

Sold $9.79M
20 tradesLast: Apr 8, 2026
Clemente Rodney

SVP, Water

Sold $5.01M
26 tradesLast: Mar 6, 2026
Ramanan Natarajan

officer: Chief Technology Officer

Sold $2.9K
1 tradesLast: Mar 6, 2026
Yeung William

Chief Legal Officer

Sold $3.05M
24 tradesLast: Feb 5, 2026
Mancini Michael S.

Chief Financial Officer

Sold $68.6K
1 tradesLast: Jan 30, 2026
Hostetler Matthew

Chief Human Resources Officer

Sold $48.0K
1 tradesLast: Jan 30, 2026
Moon David W

President and CEO

Bought $561.2KSold $417.1K
9 tradesLast: Jan 30, 2026
TONDREAU PAMELA L.

Director

Bought $201.1K
2 tradesLast: May 14, 2025
Ghasripoor Farshad

Chief Technology Officer

Sold $2.95M
13 tradesLast: Feb 3, 2025
Ballard Joshua

Chief Financial Officer

Sold $842.7K
9 tradesLast: May 28, 2024
Mao Robert Yu Lang

Director

Sold $6.58M
4 tradesLast: May 22, 2024
Chow Joan Kai

Director

Bought $26.7K
1 tradesLast: Nov 10, 2023
Sabol Colin R

Director

Bought $53.8K
2 tradesLast: Nov 9, 2023
POLLINA LISA A

Director

Sold $112.1K
2 tradesLast: Jun 9, 2023
Foda Sherif

Director

Sold $975.0K
3 tradesLast: Sep 14, 2022
MAO ROBERT YU LANG

President and CEO

Sold $44.9K
1 tradesLast: Aug 9, 2022
BUEHLER ALEXANDER J

Director

Sold $1.07M
1 tradesLast: Jun 3, 2022
Lorentzen Ole Peter

10% Owner

Sold $35.39M
2 tradesLast: Sep 15, 2021
Arvarius AS

10% Owner

Sold $19.50M
1 tradesLast: May 6, 2021