13 insiders reported 77 Form 4 transactions for Energy Recovery, Inc. (ERII) over the past 18 months (most recent 2026-07-29). Recent activity: Clemente Rodney (SVP, Water) Sell 2,320 shares, Yeung William (Chief Legal Officer) Sell 2,828 shares, Clemente Rodney (SVP, Water) Sell 5,387 shares, Yeung William (Chief Legal Officer) Sell 2,048 shares, Mitchell John Joseph (Director) Buy 16,797 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-29 | Clemente Rodney | SVP, Water | Sell | 2,320 | $19,534 |
| 2026-07-29 | Yeung William | Chief Legal Officer | Sell | 2,828 | $23,812 |
| 2026-07-29 | Clemente Rodney | SVP, Water | Sell | 5,387 | $46,113 |
| 2026-07-29 | Yeung William | Chief Legal Officer | Sell | 2,048 | $17,531 |
| 2026-07-22 | Mitchell John Joseph | Director | Buy | 16,797 | $0 |
| 2026-06-25 | Ryan Aidan | Interim CFO | Buy | 18,518 | $214,994 |
| 2026-06-17 | BUEHLER ALEXANDER J | Interim President and CEO | Buy | 15,327 | $131,812 |
| 2026-06-17 | Sabol Colin R | Director | Buy | 11,180 | $99,267 |
| 2026-06-17 | BUEHLER ALEXANDER J | Interim President and CEO | Sell | 14,900 | $129,779 |
| 2026-06-05 | TONDREAU PAMELA L. | Director | Buy | 22,316 | $185,000 |
| 2026-06-05 | Hanstveit Arve | Director | Buy | 18,094 | $149,999 |
| 2026-06-05 | Chow Joan Kai | Director | Buy | 18,094 | $149,999 |
| 2026-06-05 | Sabol Colin R | Director | Buy | 18,094 | $149,999 |
| 2026-05-15 | TONDREAU PAMELA L. | Director | Buy | 20,000 | $166,840 |
| 2026-04-08 | Hanstveit Arve | Director | Sell | 2,419 | $24,892 |
| 2026-04-06 | Hanstveit Arve | Director | Sell | 165,292 | $1.7M |
| 2026-03-11 | Hanstveit Arve | Director | Sell | 25,000 | $274,000 |
| 2026-03-09 | Hanstveit Arve | Director | Sell | 38,418 | $411,457 |
| 2026-03-09 | Hanstveit Arve | Director | Sell | 11,582 | $123,001 |
| 2026-03-06 | Clemente Rodney | SVP, Water | Sell | 20,568 | $218,226 |
| 2026-03-06 | Ramanan Natarajan | Chief Technology Officer | Sell | 272 | $2,875 |
| 2026-03-04 | Ramanan Natarajan | Chief Technology Officer | Sell | 2,724 | $27,839 |
| 2026-02-19 | Moon David W | President and CEO | Buy | 81,812 | $0 |
| 2026-02-19 | Ramanan Natarajan | Chief Technology Officer | Buy | 29,106 | $0 |
| 2026-02-19 | Hostetler Matthew | Chief Human Resources Officer | Buy | 25,959 | $0 |
Source: SEC Form 4 filings · as of 2026-07-29