| $247M | ||
| $203M | ||
| $40M | ||
| $31M | ||
| $21M | ||
| $18M |
Buys | $166,840 | 1 | 5 |
Sells | $4,659,667 | 21 | 95 |
| TONDREAU PAMELA L. | director | 1 | $166,840 | 0 | $0 | $166,840 |
| Ramanan Natarajan | Chief Technology Officer | 0 | $0 | 1 | $2,875 | $-2,875 |
| Clemente Rodney | SVP, Water | 0 | $0 | 3 | $304,128 | $-304,128 |
| Yeung William | Chief Legal Officer | 0 | $0 | 9 | $1.02M | $-1.02M |
| Hanstveit Arve | director | 0 | $0 | 9 | $3.59M | $-3.59M |
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 services such as spare parts, repair, field technical assistance, and commissioning. Furthermore, the company develops specialized solutions aimed at minimizing energy consumption in natural gas processing and in refrigeration systems that employ carbon dioxide. These various offerings are commercialized under recognized brand names including ERI, Ultra PX, PX, Pressure Exchanger, PX PowerTrain, VorTeq, IsoBoost, AT, and AquaBold. Its diverse customer base encompasses large engineering, procurement, and construction (EPC) companies, direct end-users, industry consultants, original equipment manufacturers (OEMs), and aftermarket clients. Founded in 1992, Energy Recovery, Inc. is headquartered in San Leandro, California.
Over the last 12 months, insiders at Energy Recovery, Inc. have bought $166,840 and sold $4.66M worth of Energy Recovery, Inc. stock.
On average, over the past 5 years, insiders at Energy Recovery, Inc. have bought $336,530 and sold $11.94M worth of stock each year.
Highest buying activity among insiders over the last 12 months: TONDREAU PAMELA L. (director) — $166,840.
The last purchase of 20,000 shares for transaction amount of $166,840 was made by TONDREAU PAMELA L. (director) on 2026‑05‑13.
| 2026-05-13 | TONDREAU PAMELA L. | director | 20,000 0.039% | $8.34 | $166,840 | +0.36% | ||
| 2026-04-06 | Sale | Hanstveit Arve | director | 2,419 0.0045% | $10.29 | $24,892 | -12.38% | |
| 2026-04-02 | Sale | Hanstveit Arve | director | 165,292 0.3096% | $10.14 | $1.68M | -9.02% | |
| 2026-03-10 | Sale | Hanstveit Arve | director | 25,000 0.0465% | $10.96 | $273,975 | -7.36% | |
| 2026-03-06 | Sale | Hanstveit Arve | director | 11,582 0.0219% | $10.62 | $122,943 | -4.62% | |
| 2026-03-05 | Sale | Hanstveit Arve | director | 38,418 0.0724% | $10.71 | $411,457 | -5.59% | |
| 2026-03-05 | Sale | Ramanan Natarajan | Chief Technology Officer | 272 0.0005% | $10.57 | $2,875 | -5.59% | |
| 2026-03-04 | Sale | Clemente Rodney | SVP, Water | 20,568 0.0384% | $10.61 | $218,309 | -5.41% | |
| 2026-02-06 | Sale | Yeung William | Chief Legal Officer | 646 0.0012% | $15.14 | $9,780 | -33.45% | |
| 2026-02-05 | Sale | Clemente Rodney | SVP, Water | 724 0.0013% | $14.59 | $10,563 | -31.63% | |
| 2026-02-05 | Sale | Yeung William | Chief Legal Officer | 890 0.0016% | $14.59 | $12,985 | -31.63% | |
| 2026-02-02 | Sale | Yeung William | Chief Legal Officer | 729 0.0013% | $14.46 | $10,541 | -30.47% | |
| 2026-01-28 | Sale | Yeung William | Chief Legal Officer | 7,271 0.0138% | $14.55 | $105,793 | -28.81% | |
| 2025-12-05 | Sale | Hanstveit Arve | director | 15,000 0.0283% | $14.71 | $220,605 | -24.90% | |
| 2025-12-04 | Sale | Hanstveit Arve | director | 15,000 0.0289% | $14.97 | $224,505 | -24.66% | |
| 2025-10-20 | Sale | Yeung William | Chief Legal Officer | 3,530 0.0066% | $17.00 | $60,010 | -18.91% | |
| 2025-10-16 | Sale | Yeung William | Chief Legal Officer | 3,530 0.0065% | $16.50 | $58,245 | -17.47% | |
| 2025-10-03 | Sale | Yeung William | Chief Legal Officer | 2,529 0.0049% | $16.00 | $40,464 | -11.35% | |
| 2025-09-18 | Sale | Yeung William | Chief Legal Officer | 15,454 0.0289% | $15.09 | $233,139 | -7.07% | |
| 2025-09-11 | Sale | Yeung William | Chief Legal Officer | 33,554 0.063% | $14.51 | $486,869 | -2.34% |
| Hanstveit Arve | director | 382509 0.7421% | $3.13M | 2 | 48 | <0.0001% |
| Clemente Rodney | SVP, Water | 116008 0.2251% | $950,105.52 | 0 | 47 | |
| Yeung William | Chief Legal Officer | 78208 0.1517% | $640,523.52 | 2 | 21 | <0.0001% |
| Ramanan Natarajan | Chief Technology Officer | 52565 0.102% | $430,507.35 | 0 | 1 | |
| TONDREAU PAMELA L. | director | 37362 0.0725% | $305,994.78 | 3 | 0 | +0.19% |
| Arvarius AS | 10 percent owner | 6532490 12.6733% | $53.5M | 0 | 3 | |
| Lorentzen Ole Peter | 10 percent owner | 5155239 10.0014% | $42.22M | 7 | 5 | <0.0001% |
| Trempont Dominique | director | 420042 0.8149% | $3.44M | 16 | 0 | <0.0001% |
| Mao Robert Yu Lang | director | 236099 0.458% | $1.93M | 5 | 9 | <0.0001% |
| Medanich James | director | 170000 0.3298% | $1.39M | 0 | 1 | |
| Pique Gonzalo G | director | 130000 0.2522% | $1.06M | 2 | 7 | <0.0001% |
| Ghasripoor Farshad | Chief Technology Officer | 126961 0.2463% | $1.04M | 0 | 18 | |
| Stover Richard | CTO | 120330 0.2334% | $985,502.70 | 0 | 3 | |
| Johannessen Fred Olav | director | 102200 0.1983% | $837,018.00 | 0 | 30 | |
| Wang Xiao Yin | VP, OEM Group | 99800 0.1936% | $817,362.00 | 0 | 5 | |
| Siebert Eric | VP, Oil and Gas | 72105 0.1399% | $590,539.95 | 1 | 7 | +7.69% |
| Bensalah Nocair | VP Operations | 58964 0.1144% | $482,915.16 | 0 | 9 | |
| Smith Emily | SVP, Corp Dev and Ops | 45223 0.0877% | $370,376.37 | 0 | 8 | |
| Ballard Joshua | Chief Financial Officer | 40376 0.0783% | $330,679.44 | 0 | 10 | |
| Moon David W | President and CEO | 36950 0.0717% | $302,620.50 | 5 | 2 | +0.78% |
| Gannon Chris M | CFO | 32435 0.0629% | $265,642.65 | 2 | 0 | +15.82% |
| STROUD ANDREW B JR | VP, Human Resources | 25281 0.049% | $207,051.39 | 1 | 2 | |
| Cook Paul M. | director | 20300 0.0394% | $166,257.00 | 1 | 0 | <0.0001% |
| FJELL OLAV | director | 18000 0.0349% | $147,420.00 | 1 | 0 | +23.18% |
| BUEHLER ALEXANDER J | 14812 0.0287% | $121,310.28 | 3 | 6 | ||
| SMITH LENOX SHARON E | Corporate Controller and CAO | 11581 0.0225% | $94,848.39 | 0 | 3 | |
| Otero Juan | Gen Counsel,CCO,Corp Secretary | 6715 0.013% | $54,995.85 | 1 | 0 | +50.7% |
| Foda Sherif | director | 4812 0.0093% | $39,410.28 | 0 | 3 | |
| POLLINA LISA A | director | 4007 0.0078% | $32,817.33 | 0 | 3 | |
| Sabol Colin R | director | 3000 0.0058% | $24,570.00 | 2 | 0 | <0.0001% |
| Sanchez-Blanco Borja | SVP, Sales and Marketing | 1800 0.0035% | $14,742.00 | 1 | 0 | +9.87% |
| Chow Joan Kai | director | 1500 0.0029% | $12,285.00 | 1 | 0 | <0.0001% |
| Michelet Hans Peter | director | 0 0% | $0 | 0 | 43 |
| 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 |