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Nasdaq · CIK 0001421517

ERII Energy Recovery, Inc.

Insider trading from SEC Form 4. Last filing Sep 22, 2025. Close $6.84 on Oct 9, 2026, +3% from the 52-week low and -62% from the high.

Last 90 days

Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
11
with a Form 4 at this company

Price and insider trades, last year

ERIIOct 9, 2026 · close 6.84

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at Energy Recovery, Inc., scored.

ScoreInsiderValueHoldingsPrice contextFiled
0WeakWilliam Yeung
Chief Legal Officer
sell
$233k
15,454 shares
-14%+33% from low-24% from high
8WeakWilliam Yeung
Chief Legal Officer
sell
$487k
33,554 shares
-26%+28% from low-27% from high
3WeakRodney Clemente
SVP, Water
sell
$75k
5,387 shares
-5%+21% from low-31% from high
35WeakArve Hanstveit
director
sell
$635k
50,000 shares
-7%+12% from low-36% from high
51ModeratePamela L. Tondreau
director
buy
$52k
4,200 shares
+11%+8% from low-38% from high
61NotableDavid W Moon
President and CEO
buy
$51k
4,200 shares
+13%+8% from low-38% from high
45ModerateArve Hanstveit
director
sell
$817k
50,000 shares
-7%-
8WeakRodney Clemente
SVP, Water
sell
$30k
1,843 shares
-2%-
15WeakRodney Clemente
SVP, Water
sell
$331k
21,444 shares
-16%-
30WeakArve Hanstveit
director
sell
$337k
20,000 shares
-3%-
34WeakRodney Clemente
SVP, Water
sell
$550k
27,456 shares
-21%-
40ModerateRodney Clemente
SVP, Water
sell
$117k
6,505 shares
-5%-
46ModerateDavid W Moon
President and CEO
sell
$46k
2,550 shares
-3%-
42ModerateFarshad Ghasripoor
Chief Technology Officer
sell
$189k
10,526 shares
-8%-

Transactions

The last 51 rows filed, every code.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
Sep 18, 2025William Yeung
Chief Legal Officer
MOption exercise
Common Stock10b5-1
+15,454$8.95$138k112,823Sep 22, 2025
Sep 18, 2025William Yeung
Chief Legal Officer
SOpen-market sale
Common Stock10b5-1
-15,454$15.09$233k97,369Sep 22, 2025
Sep 18, 2025William Yeung
Chief Legal Officer
MOption exercise
Employee Stock Option (Right to Buy)derivative10b5-1
-15,454$8.95$138k0Sep 22, 2025
Sep 11, 2025William Yeung
Chief Legal Officer
MOption exercise
Common Stock10b5-1
+30,877$8.95$276k130,923Sep 15, 2025
Sep 11, 2025William Yeung
Chief Legal Officer
SOpen-market sale
Common Stock10b5-1
-33,554$14.51$487k97,369Sep 15, 2025
Sep 11, 2025William Yeung
Chief Legal Officer
MOption exercise
Employee Stock Option (Right to Buy)derivative10b5-1
-30,877$8.95$276k15,454Sep 15, 2025
Jul 25, 2025Rodney Clemente
SVP, Water
FTax withholding
Common Stock10b5-1
-2,320$13.88$32k106,152Jul 29, 2025
Jul 25, 2025William Yeung
Chief Legal Officer
FTax withholding
Common Stock
-1,989$13.88$28k100,046Jul 29, 2025
Jul 28, 2025Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock10b5-1
-5,387$13.97$75k100,765Jul 29, 2025
Jun 11, 2025Arve Hanstveit
director
SOpen-market sale
Common Stock
-20,000$12.75$255k685,220Jun 13, 2025
Jun 12, 2025Arve Hanstveit
director
SOpen-market sale
Common Stock
-30,000$12.68$380k655,220Jun 13, 2025
Jun 5, 2025Arve Hanstveit
director
AGrant or award
Common Stock
+12,038$0.00$0705,220Jun 6, 2025
Jun 5, 2025Pamela L. Tondreau
director
AGrant or award
Common Stock
+14,847$0.00$055,890Jun 6, 2025
Jun 5, 2025Colin R Sabol
director
AGrant or award
Common Stock
+12,038$0.00$026,397Jun 6, 2025
Jun 5, 2025Joan Kai Chow
director
AGrant or award
Common Stock
+12,038$0.00$034,022Jun 6, 2025
Jun 5, 2025Alexander J Buehler
director
AGrant or award
Common Stock
+12,038$0.00$066,328Jun 6, 2025
May 14, 2025Pamela L. Tondreau
director
POpen-market purchase
Common Stock
+4,200$12.28$52k41,043May 15, 2025
May 13, 2025David W Moon
President and CEO
POpen-market purchase
Common Stockindirect: David and Rhonda Moon JCP
+4,200$12.20$51k36,950May 15, 2025
Mar 11, 2025Arve Hanstveit
director
SOpen-market sale
Common Stock
-50,000$16.34$817k693,182Mar 13, 2025
Mar 10, 2025Rodney Clemente
SVP, Water
FTax withholding
Common Stock10b5-1
-794$16.37$13k110,315Mar 12, 2025
Mar 10, 2025William Yeung
Chief Legal Officer
FTax withholding
Common Stock
-944$16.37$15k102,035Mar 12, 2025
Mar 3, 2025Natarajan Ramanan
Chief Technology Officer
AGrant or award
Common Stock
+26,455--26,455Mar 12, 2025
Mar 11, 2025Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock10b5-1
-1,843$16.23$30k108,472Mar 12, 2025
Mar 3, 2025Natarajan Ramanan
Chief Technology Officer
AGrant or award
Employee Stock Option (Right to Buy)derivative
+65,030$15.12$983k65,030Mar 12, 2025
Feb 20, 2025Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock10b5-1
-21,444$15.42$331k111,109Feb 24, 2025
Feb 3, 2025William Yeung
Chief Legal Officer
FTax withholding
Common Stock
-882$14.34$13k102,979Feb 5, 2025
Feb 3, 2025Rodney Clemente
SVP, Water
FTax withholding
Common Stock
-944$14.34$14k132,553Feb 5, 2025
Feb 3, 2025Farshad Ghasripoor
Chief Technology Officer
FTax withholding
Common Stock
-1,420$14.34$20k117,860Feb 5, 2025
Feb 4, 2025Farshad Ghasripoor
Chief Technology Officer
JOther
Common Stock
-65,000$0.00$052,860Feb 5, 2025
Feb 4, 2025Farshad Ghasripoor
Chief Technology Officer
JOther
Common Stockindirect: JT with Spouse
+65,000$0.00$070,230Feb 5, 2025
Jan 30, 2025Rodney Clemente
SVP, Water
FTax withholding
Common Stock
-694$14.33$9,945134,112Feb 3, 2025
Jan 30, 2025Farshad Ghasripoor
Chief Technology Officer
FTax withholding
Common Stock
-1,034$14.33$15k120,206Feb 3, 2025
Jan 30, 2025William Yeung
Chief Legal Officer
FTax withholding
Common Stock
-698$14.33$10k104,488Feb 3, 2025
Jan 31, 2025Rodney Clemente
SVP, Water
FTax withholding
Common Stock
-615$14.56$8,954133,497Feb 3, 2025
Jan 31, 2025Farshad Ghasripoor
Chief Technology Officer
FTax withholding
Common Stock
-926$14.56$13k119,280Feb 3, 2025
Jan 31, 2025William Yeung
Chief Legal Officer
FTax withholding
Common Stock
-627$14.56$9,129103,861Feb 3, 2025
Jan 27, 2025Rodney Clemente
SVP, Water
FTax withholding
Common Stock
-5,784$14.40$83k134,806Jan 29, 2025
Jan 27, 2025Farshad Ghasripoor
Chief Technology Officer
FTax withholding
Common Stock
-5,721$14.40$82k121,240Jan 29, 2025
Jan 27, 2025William Yeung
Chief Legal Officer
FTax withholding
Common Stock
-4,061$14.40$58k105,186Jan 29, 2025
Jan 27, 2025David W Moon
President and CEO
FTax withholding
Common Stock
-7,664$14.40$110k168,417Jan 29, 2025
Jan 23, 2025Rodney Clemente
SVP, Water
AGrant or award
Common Stock
+34,223$0.00$0140,590Jan 27, 2025
Jan 23, 2025William Yeung
Chief Legal Officer
AGrant or award
Common Stock
+23,956$0.00$0109,247Jan 27, 2025
Jan 23, 2025David W Moon
President and CEO
AGrant or award
Common Stock
+88,980$0.00$0176,081Jan 27, 2025
Jan 23, 2025Michael S. Mancini
Chief Financial Officer
AGrant or award
Common Stock
+34,223$0.00$034,223Jan 27, 2025
Dec 11, 2024Arve Hanstveit
director
SOpen-market sale
Common Stock
-20,000$16.87$337k743,182Dec 17, 2024
Nov 7, 2024Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock10b5-1
-19,618$20.00$392k114,205Nov 12, 2024
Nov 8, 2024Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock10b5-1
-3,631$20.15$73k110,574Nov 12, 2024
Nov 11, 2024Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock10b5-1
-4,207$20.06$84k106,367Nov 12, 2024
Oct 28, 2024Rodney Clemente
SVP, Water
SOpen-market sale
Common Stock
-6,505$17.98$117k133,823Oct 30, 2024
Oct 28, 2024David W Moon
President and CEO
SOpen-market sale
Common Stock
-2,550$17.97$46k87,101Oct 30, 2024
Oct 28, 2024Farshad Ghasripoor
Chief Technology Officer
SOpen-market sale
Common Stock
-10,526$17.97$189k126,961Oct 30, 2024

Insiders

Everyone who has filed a Form 4 here.

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

ERII insider trading: Energy Recovery, Inc. | InsiderTell