ERII (Energy Recovery, Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by ERII officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-29 | Rodney Clemente | SVP, Water | MIXED | — | — |
| 2026-07-29 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2026-07-22 | John Joseph Mitchell | Director | A | — | — |
| 2026-06-25 | Aidan Ryan | Interim CFO | A | — | — |
| 2026-06-17 | Colin R Sabol | Director | Buy | — | — |
| 2026-06-17 | ALEXANDER J BUEHLER | Interim President and CEO | MIXED | — | — |
| 2026-06-05 | Joan Kai Chow | Director | A | — | — |
| 2026-06-05 | Colin R Sabol | Director | A | — | — |
| 2026-06-05 | Arve Hanstveit | Director | A | — | — |
| 2026-06-05 | PAMELA L. TONDREAU | Director | A | — | — |
| 2026-05-15 | PAMELA L. TONDREAU | Director | Buy | — | — |
| 2026-04-08 | Arve Hanstveit | Director | Sell | — | — |
| 2026-04-06 | Arve Hanstveit | Director | Sell | — | — |
| 2026-03-11 | Arve Hanstveit | Director | Sell | — | — |
| 2026-03-09 | Arve Hanstveit | Director | Sell | — | — |
| 2026-03-06 | Natarajan Ramanan | Chief Technology Officer | Sell | — | — |
| 2026-03-06 | Rodney Clemente | SVP, Water | Sell | — | — |
| 2026-03-04 | Natarajan Ramanan | Chief Technology Officer | F | — | — |
| 2026-02-19 | Matthew Hostetler | Chief Human Resources Officer | A | — | — |
| 2026-02-19 | Michael S. Mancini | Chief Financial Officer | A | — | — |
| 2026-02-19 | Natarajan Ramanan | Chief Technology Officer | A | — | — |
| 2026-02-19 | David W Moon | President and CEO | A | — | — |
| 2026-02-19 | Rodney Clemente | SVP, Water | A | — | — |
| 2026-02-19 | William Yeung | Chief Legal Officer | A | — | — |
| 2026-02-09 | Rodney Clemente | SVP, Water | Sell | — | — |
| 2026-02-09 | William Yeung | Chief Legal Officer | Sell | — | — |
| 2026-02-03 | David W Moon | President and CEO | F | — | — |
| 2026-02-03 | Matthew Hostetler | Chief Human Resources Officer | F | — | — |
| 2026-02-03 | Michael S. Mancini | Chief Financial Officer | F | — | — |
| 2026-02-03 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2026-02-03 | Rodney Clemente | SVP, Water | F | — | — |
| 2025-12-08 | Arve Hanstveit | Director | Sell | — | — |
| 2025-10-27 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2025-10-22 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2025-10-17 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2025-10-07 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2025-09-22 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2025-09-15 | William Yeung | Chief Legal Officer | MIXED | — | — |
| 2025-07-29 | Rodney Clemente | SVP, Water | MIXED | — | — |
| 2025-07-29 | William Yeung | Chief Legal Officer | F | — | — |
| 2025-06-13 | Arve Hanstveit | Director | Sell | — | — |
| 2025-06-06 | PAMELA L. TONDREAU | Director | A | — | — |
| 2025-06-06 | ALEXANDER J BUEHLER | Director | A | — | — |
| 2025-06-06 | Colin R Sabol | Director | A | — | — |
| 2025-06-06 | Joan Kai Chow | Director | A | — | — |
| 2025-06-06 | Arve Hanstveit | Director | A | — | — |
| 2025-05-15 | PAMELA L. TONDREAU | Director | Buy | — | — |
| 2025-05-15 | David W Moon | President and CEO | Buy | — | — |
| 2025-03-13 | Arve Hanstveit | Director | Sell | — | — |
| 2025-03-12 | William Yeung | Chief Legal Officer | F | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 5,155,239 | — |
| — | Director | 3,300,000 | — |
| — | Director | 875,000 | — |
| — | Director | 460,603 | — |
| — | Director | 453,901 | — |
| — | President, CEO | 449,100 | — |
| — | Director | 345,143 | — |
| — | President and CEO | 270,019 | — |
| — | Chief Technology Officer | 188,090 | — |
| — | VP of Manufacturing | 124,000 | — |
| — | SVP Service/CTO | 120,330 | — |
| — | SVP, Water | 113,688 | — |
| — | Chief Legal Officer | 106,907 | — |
| — | VP, OEM Group | 99,800 | — |
| — | Director | 98,206 | — |
| — | President and CEO | 95,051 | — |
| — | Chief Executive Officer | 77,859 | — |
| — | Chief Financial Officer | 75,051 | — |
| — | VP, Oil and Gas | 72,004 | — |
| — | Interim President and CEO | 66,755 | — |
| — | VP Operations | 60,088 | — |
| — | Director | 58,671 | — |
| — | SVP, Corp Dev and Ops | 57,643 | — |
| — | Director | 53,616 | — |
| — | Chief Technology Officer | 52,565 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ERII quote page; the site-wide leaderboard is on the insider transactions hub.