| $1B | ||
| $100M | ||
| $54M | ||
| $40M | ||
| $32M | ||
| $31M |
Buys | $266,107 | 2 | 11 |
Sells | $3,518,707 | 17 | 89 |
| TONDREAU PAMELA L. | director | 1 | $166,840 | 0 | $0 | $166,840 |
| Sabol Colin R | director | 1 | $99,267 | 0 | $0 | $99,267 |
| Ramanan Natarajan | Chief Technology Officer | 0 | $0 | 1 | $2,875 | $-2,875 |
| BUEHLER ALEXANDER J | Interim President and CEO | 0 | $0 | 1 | $129,779 | $-129,779 |
| Yeung William | Chief Legal Officer | 0 | $0 | 5 | $156,631 | $-156,631 |
| Clemente Rodney | SVP, Water | 0 | $0 | 3 | $274,985 | $-274,985 |
| Hanstveit Arve | director | 0 | $0 | 7 | $2.95M | $-2.95M |
Energy Recovery, Inc. (ERII) is a global technology firm that engineers, manufactures, and distributes cutting-edge solutions predominantly for the seawater reverse osmosis (SWRO) desalination and industrial wastewater treatment industries. The company manages its operations through two distinct divisions: Water and Emerging Technologies. Its extensive product range includes advanced energy recovery devices, high-pressure feed and recirculation pumps, and hydraulic turbochargers and boosters. Beyond hardware, ERII also offers crucial support …
Over the last 12 months, insiders at Energy Recovery, Inc. have bought $266,107 and sold $3.52M worth of Energy Recovery, Inc. stock.
On average, over the past 5 years, insiders at Energy Recovery, Inc. have bought $369,619 and sold $4.88M worth of stock each year.
Highest buying activity among insiders over the last 12 months: TONDREAU PAMELA L. (director) — $166,840. Sabol Colin R (director) — $99,267.
The last purchase of 11,180 shares for transaction amount of $99,267 was made by Sabol Colin R (director) on 2026‑06‑15.
| 2026-07-28 | Sale | Clemente Rodney | SVP, Water | 5,387 0.0107% | $8.56 | $46,113 | -15.24% | |
| 2026-07-28 | Sale | Yeung William | Chief Legal Officer | 2,048 0.004% | $8.56 | $17,531 | -15.24% | |
| 2026-06-15 | Sale | BUEHLER ALEXANDER J | Interim President and CEO | 14,900 0.0287% | $8.71 | $129,779 | -11.24% | |
| 2026-06-15 | Sabol Colin R | director | 11,180 0.022% | $8.88 | $99,267 | -11.24% | ||
| 2026-05-13 | TONDREAU PAMELA L. | director | 20,000 0.039% | $8.34 | $166,840 | -3.97% | ||
| 2026-04-06 | Sale | Hanstveit Arve | director | 2,419 0.0045% | $10.29 | $24,892 | -19.87% | |
| 2026-04-02 | Sale | Hanstveit Arve | director | 165,292 0.3096% | $10.14 | $1.68M | -17.89% | |
| 2026-03-10 | Sale | Hanstveit Arve | director | 25,000 0.0465% | $10.96 | $273,975 | -21.44% | |
| 2026-03-06 | Sale | Hanstveit Arve | director | 11,582 0.0219% | $10.62 | $122,943 | -19.13% | |
| 2026-03-05 | Sale | Hanstveit Arve | director | 38,418 0.0724% | $10.71 | $411,457 | -19.85% | |
| 2026-03-05 | Sale | Ramanan Natarajan | Chief Technology Officer | 272 0.0005% | $10.57 | $2,875 | -19.85% | |
| 2026-03-04 | Sale | Clemente Rodney | SVP, Water | 20,568 0.0384% | $10.61 | $218,309 | -19.59% | |
| 2026-02-06 | Sale | Yeung William | Chief Legal Officer | 646 0.0012% | $15.14 | $9,780 | -44.05% | |
| 2026-02-05 | Sale | Clemente Rodney | SVP, Water | 724 0.0013% | $14.59 | $10,563 | -42.69% | |
| 2026-02-05 | Sale | Yeung William | Chief Legal Officer | 890 0.0016% | $14.59 | $12,985 | -42.69% | |
| 2026-02-02 | Sale | Yeung William | Chief Legal Officer | 729 0.0013% | $14.46 | $10,541 | -42.01% | |
| 2026-01-28 | Sale | Yeung William | Chief Legal Officer | 7,271 0.0138% | $14.55 | $105,793 | -40.75% | |
| 2025-12-05 | Sale | Hanstveit Arve | director | 15,000 0.0283% | $14.71 | $220,605 | -39.54% | |
| 2025-12-04 | Sale | Hanstveit Arve | director | 15,000 0.0289% | $14.97 | $224,505 | -39.37% | |
| 2025-10-20 | Sale | Yeung William | Chief Legal Officer | 3,530 0.0066% | $17.00 | $60,010 | -40.28% |
| Hanstveit Arve | director | 382509 0.7494% | $2.74M | 2 | 48 | <0.0001% |
| Yeung William | Chief Legal Officer | 99291 0.1945% | $711,916.47 | 2 | 22 | <0.0001% |
| BUEHLER ALEXANDER J | Interim President and CEO | 66755 0.1308% | $478,633.35 | 3 | 7 | |
| Sabol Colin R | director | 55671 0.1091% | $399,161.07 | 3 | 0 | <0.0001% |
| TONDREAU PAMELA L. | director | 37362 0.0732% | $267,885.54 | 3 | 0 | +0.19% |
| Lorentzen Ole Peter | 10 percent owner | 5155239 10.0994% | $36.96M | 7 | 5 | <0.0001% |
| Trempont Dominique | director | 420042 0.8229% | $3.01M | 16 | 0 | <0.0001% |
| Mao Robert Yu Lang | director | 236099 0.4625% | $1.69M | 5 | 9 | <0.0001% |
| Pique Gonzalo G | director | 130000 0.2547% | $932,100.00 | 2 | 7 | <0.0001% |
| Siebert Eric | VP, Oil and Gas | 72105 0.1413% | $516,992.85 | 1 | 7 | +7.69% |
| Moon David W | President and CEO | 36950 0.0724% | $264,931.50 | 5 | 2 | +0.78% |
| Gannon Chris M | CFO | 32435 0.0635% | $232,558.95 | 2 | 0 | +15.82% |
| STROUD ANDREW B JR | VP, Human Resources | 25281 0.0495% | $181,264.77 | 1 | 2 | |
| Cook Paul M. | director | 20300 0.0398% | $145,551.00 | 1 | 0 | <0.0001% |
| FJELL OLAV | director | 18000 0.0353% | $129,060.00 | 1 | 0 | +23.18% |
| Otero Juan | Gen Counsel,CCO,Corp Secretary | 6715 0.0132% | $48,146.55 | 1 | 0 | +50.7% |
| Sanchez-Blanco Borja | SVP, Sales and Marketing | 1800 0.0035% | $12,906.00 | 1 | 0 | +9.87% |
| Chow Joan Kai | director | 1500 0.0029% | $10,755.00 | 1 | 0 | <0.0001% |
| Increased Positions | 86 | +37.55% | 6M | +13.47% |
| Decreased Positions | 99 | -43.23% | 6M | -13.43% |
| New Positions | 26 | New | 1M | New |
| Sold Out Positions | 23 | Sold Out | 1M | Sold Out |
| Total Postitions | 216 | -5.68% | 44M | +0.04% |
| Blackrock, Inc. | $79,252.00 | 10.9% | 5.78M | +132,139 | +2.34% | 2025-09-30 |
| Ameriprise Financial Inc | $68,138.00 | 9.37% | 4.97M | -434,748 | -8.05% | 2025-09-30 |
| Vanguard Group Inc | $51,625.00 | 7.1% | 3.76M | +137,338 | +3.79% | 2025-09-30 |
| Fil Ltd | $28,001.00 | 3.85% | 2.04M | -139,073 | -6.38% | 2025-09-30 |
| Brown Capital Management Llc | $21,993.00 | 3.02% | 1.6M | -876,312 | -35.34% | 2025-09-30 |
| State Street Corp | $19,746.00 | 2.72% | 1.44M | -20,344 | -1.39% | 2025-09-30 |
| Legal & General Group Plc | $17,942.00 | 2.47% | 1.31M | +318,584 | +32.21% | 2025-09-30 |
| Geode Capital Management, Llc | $17,723.00 | 2.44% | 1.29M | -1,185 | -0.09% | 2025-09-30 |
| Kbc Group Nv | $16,554.00 | 2.28% | 1.21M | -36,323 | -2.92% | 2025-06-30 |
| Avenir Corp | $14,074.00 | 1.94% | 1.03M | -32,144 | -3.04% | 2025-09-30 |