Energy Recovery (NASDAQ: ERII) insider transactions
In the twelve months to 10 November 2026, executives and directors of Energy Recovery reported 17 open-market sales of 326,146 shares ($3.5m) and 2 open-market purchases of 31,180 shares ($266,078), by 7 people, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 28 July 2026 | Yeung William | Chief Legal Officer | Open-market sale | −2,048 | $8.56 | 99,291 | Form 4 |
| 28 July 2026 | Clemente Rodney | SVP, Water | Open-market sale | −5,387 | $8.56 | 108,301 | Form 4 |
| 27 July 2026 | Yeung William | Chief Legal Officer | Shares withheld for tax | −2,828 | $8.42 | 101,339 | Form 4 |
| 27 July 2026 | Clemente Rodney | SVP, Water | Shares withheld for tax | −2,320 | $8.42 | 113,688 | Form 4 |
| 9 July 2026 | Mitchell John Joseph | Director | Grant or award | +16,797 | — | 16,797 | Form 4 |
| 15 June 2026 | Buehler Alexander J | Interim President and CEO | Option exercise | +15,327 | $8.60 | 81,655 | Form 4 |
| 15 June 2026 | Buehler Alexander J | Interim President and CEO | Open-market sale | −14,900 | $8.71 | 66,755 | Form 4 |
| 15 June 2026 | Sabol Colin R | Director | Open-market purchase | +11,180 | $8.88 | 55,671 | Form 4 |
| 4 June 2026 | Chow Joan Kai | Director | Grant or award | +18,094 | $8.29 | 52,116 | Form 4 |
| 4 June 2026 | Sabol Colin R | Director | Grant or award | +18,094 | $8.29 | 44,491 | Form 4 |
| 4 June 2026 | Hanstveit Arve | Director | Grant or award | +18,094 | $8.29 | 400,603 | Form 4 |
| 4 June 2026 | Tondreau Pamela L. | Director | Grant or award | +22,316 | $8.29 | 60,844 | Form 4 |
| 13 May 2026 | Tondreau Pamela L. | Director | Open-market purchase | +20,000 | $8.34 | 37,362 | Form 4 |
| 6 May 2026 | Ryan Aidan | Interim CFO | Grant or award | +18,518 | $11.61 | 34,133 | Form 4 |
| 6 April 2026 | Hanstveit Arve | Director | Open-market sale | −2,419 | $10.29 | 382,509 | Form 4 |
| 2 April 2026 | Hanstveit Arve | Director | Open-market sale | −165,292 | $10.14 | 384,928 | Form 4 |
| 10 March 2026 | Hanstveit Arve | Director | Open-market sale | −25,000 | $10.96 | 550,220 | Form 4 |
| 6 March 2026 | Hanstveit Arve | Director | Open-market sale | −11,582 | $10.62 | 575,220 | Form 4 |
| 5 March 2026 | Hanstveit Arve | Director | Open-market sale | −38,418 | $10.71 | 586,802 | Form 4 |
| 5 March 2026 | Ramanan Natarajan | Chief Technology Officer | Open-market sale | −272 | $10.57 | 52,565 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Energy Recovery page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.