Energy Recovery (ERII) stock: insider trades, news & valuation
Net sellingShare price and insider trades
Energy Recovery insider trading at a glance (Oct 9, 2026): in the past 12 months, 2 insiders bought $266K and 5 sold $3.9M of ERII stock on the open market.
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ERII insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $64K | 2 |
| Q2 2026 | $266K | 2 | $1.8M | 3 |
| Q1 2026 | — | 0 | $1.2M | 10 |
| Q4 2025 | — | 0 | $847K | 9 |
Valuation, profit and volume
Summary
Over the past 12 months, 2 Energy Recovery, Inc. insiders reported open-market purchases totaling $266K, while 5 insiders reported sales totaling $3.9M. 15 of 24 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Jul 29SEC | Rodney ClementeSvp, Water | Sell Plan | 5,387108,301 held (−5%) | $8.56 | $46K | -20.1% | — |
| Jul 29SEC | William YeungGeneral Counsel | Sell Plan | 2,04899,291 held (−2%) | $8.56 | $18K | -20.1% | — |
| Jun 17SEC | Alexander J BuehlerCEO, President | Sell | 14,90066,755 held (−18%) | $8.71 | $130K | -21.5% | — |
| Jun 17SEC | Colin R SabolDirector | Buy | 11,18055,671 held (+25%) | $8.88 | $99K | -23.0% | — |
| May 15SEC | Pamela L. TondreauDirector | Buy | 20,00037,362 held (+115%) | $8.34 | $167K | -18.0% | — |
| Apr 8SEC | Arve HanstveitDirector | Sell | 2,419382,509 held (−1%) | $10.29 | $25K | -33.5% | — |
| Apr 6SEC | Arve HanstveitDirector | Sell | 165,292384,928 held (−30%) | $10.14 | $1.7M | -32.5% | — |
| Mar 11SEC | Arve HanstveitDirector | Sell | 25,000550,220 held (−4%) | $10.96 | $274K | -37.6% | — |
| Mar 9SEC | Arve HanstveitDirector | Sell | 38,418586,802 held (−6%) | $10.71 | $411K | -36.1% | — |
| Mar 9SEC | Arve HanstveitDirector | Sell | 11,582575,220 held (−2%) | $10.62 | $123K | -35.6% | — |
| Mar 6SEC | Rodney ClementeSvp, Water | Sell Plan | 20,568116,008 held (−15%) | $10.61 | $218K | -35.5% | — |
| Mar 6SEC | Natarajan RamananCTO | Sell | 27252,565 held (−1%) | $10.57 | $3K | -35.3% | — |
| Feb 9SEC | William YeungGeneral Counsel | Sell Plan | 89078,854 held (−1%) | $14.59 | $13K | -53.1% | — |
| Feb 9SEC | Rodney ClementeSvp, Water | Sell Plan | 72490,950 held (−1%) | $14.59 | $11K | -53.1% | — |
| Feb 9SEC | William YeungGeneral Counsel | Sell Plan | 64678,208 held (−1%) | $15.14 | $10K | -54.8% | — |
| Feb 3SEC | William YeungGeneral Counsel | Sell Plan | 7,27190,098 held (−7%) | $14.55 | $106K | -53.0% | — |
| Feb 3SEC | William YeungGeneral Counsel | Sell Plan | 72979,744 held (−1%) | $14.46 | $11K | -52.7% | — |
| Dec 8SEC | Arve HanstveitDirector | Sell | 15,000640,220 held (−2%) | $14.97 | $225K | -54.3% | — |
| Dec 8SEC | Arve HanstveitDirector | Sell | 15,000625,220 held (−2%) | $14.71 | $221K | -53.5% | — |
| Oct 27SEC | William YeungGeneral Counsel | Sell Plan | 5,63897,369 held (−5%) | $18.00 | $101K | -62.0% | — |
| Oct 27SEC | William YeungGeneral Counsel | Sell Plan | 3,53097,369 held (−3%) | $18.00 | $64K | -62.0% | — |
| Oct 27SEC | William YeungGeneral Counsel | Sell Plan | 3,53097,369 held (−3%) | $17.50 | $62K | -60.9% | — |
| Oct 22SEC | William YeungGeneral Counsel | Sell Plan | 3,53097,369 held (−3%) | $17.00 | $60K | -59.8% | — |
| Oct 17SEC | William YeungGeneral Counsel | Sell Plan | 3,53097,369 held (−3%) | $16.50 | $58K | -58.5% | — |
| Oct 7SEC | William YeungGeneral Counsel | Sell Plan | 2,52997,369 held (−3%) | $16.00 | $40K | -57.2% | — |
| Oct 7SEC | William YeungGeneral Counsel | Sell Plan | 1,03897,369 held (−1%) | $16.00 | $17K | -57.2% | — |
Insiders at Energy Recovery, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Arve HanstveitDirector | — | $3.0M | Apr 8, 2026 | — |
| William YeungGeneral Counsel | — | $559K | Jul 29, 2026 | — |
| Pamela L. TondreauDirector | $167K | — | May 15, 2026 | — |
| Colin R SabolDirector | $99K | — | Jun 17, 2026 | — |
| Rodney ClementeSvp, Water | — | $275K | Jul 29, 2026 | — |
| Alexander J BuehlerCEO, President | — | $130K | Jun 17, 2026 | — |
| Natarajan RamananCTO | — | $3K | Mar 6, 2026 | — |
ERII stock: common questions
Are Energy Recovery, Inc. insiders buying ERII stock?
In the past 12 months, 2 insiders reported open-market purchases of ERII worth $266K. The latest was Director Colin R Sabol bought $99K of ERII at $8.88 — first open-market purchase in our records; raises the stake by 25%.
Are Energy Recovery, Inc. insiders selling ERII stock?
5 insiders reported sales worth $3.9M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is ERII's 52-week range?
Over the past year ERII has traded between $6.67 and $18.11. It last closed at $6.84 on Oct 9, 2026.