ERII
insider transactionsEnergy Recovery, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 2 different insiders made open-market purchases in the last 365 days, totalling $266.1K.
Net shares · 365d
-257.5K
31.2K buy · 288.7K sell
Net value · 365d
-$2.7M
$266.1K in · $3.0M out
Sentiment · 365d
Net selling
8% buying · 92% selling
Open-market trades · 365d
15
31.2K buy · 288.7K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Buy·P
Director
$99.3K
11.2K sh · $8.88
Own +25%
-
Exercise·M
Interim President and CEO
$131.8K
15.3K sh · $8.60
Own New
-
Sell·S
Interim President and CEO
$129.8K
14.9K sh · $8.71
Own -18%
-
Exercise·M
Interim President and CEO
$131.8K
15.3K sh · $8.60
Own +23%
-
Grant·A
Director
$185.0K
22.3K sh · $8.29
Own +58%
-
Grant·A
Director
$150.0K
18.1K sh · $8.29
Own +5%
-
Grant·A
Director
$150.0K
18.1K sh · $8.29
Own +69%
-
Grant·A
Director
$150.0K
18.1K sh · $8.29
Own +53%
-
Buy·P
Director
$166.8K
20.0K sh · $8.34
Own +115%
-
Sell·S
Director
$24.9K
2.4K sh · $10.29
Own -1%
-
Sell·S
Director
$1.7M
165.3K sh · $10.14
Own -30%
-
Sell·S
Director
$274.0K
25.0K sh · $10.96
Own -4%
-
Sell·S
Director
$122.9K
11.6K sh · $10.62
Own -2%
-
Sell·S
Chief Technology Officer
$2.9K
272 sh · $10.57
Own -1%
-
Sell·S
Director
$411.5K
38.4K sh · $10.71
Own -6%
-
Sell·S
SVP, Water · 10b5-1
$218.3K
20.6K sh · $10.61
Own -15%
-
Other·F
Chief Technology Officer
$27.8K
2.7K sh · $10.22
Own -5%
-
Grant·A
Chief Human Resources Officer
$0
26.0K sh
Own +126%
-
Grant·A
Chief Financial Officer
$0
45.6K sh
Own +155%
-
Grant·A
Chief Legal Officer
$0
26.0K sh
Own +33%
-
Grant·A
Chief Technology Officer
$0
29.1K sh
Own +110%
-
Grant·A
David W Moon KEY
President and CEO
$0
81.8K sh
Own +54%
-
Grant·A
SVP, Water
$0
45.6K sh
Own +50%
-
Sell·S
Chief Legal Officer · 10b5-1
$9.8K
646 sh · $15.14
Own -1%
-
Sell·S
Chief Legal Officer · 10b5-1
$13.0K
890 sh · $14.59
Own -1%
-
Sell·S
SVP, Water · 10b5-1
$10.6K
724 sh · $14.59
Own -1%
-
Sell·S
Chief Legal Officer · 10b5-1
$10.5K
729 sh · $14.46
Own -1%
-
Other·F
Chief Legal Officer · 10b5-1
$123.3K
8.6K sh · $14.30
Own -10%
-
Other·F
Chief Legal Officer · 10b5-1
$14.7K
1.0K sh · $14.65
Own -1%
-
Other·F
Chief Human Resources Officer
$48.0K
3.4K sh · $14.30
Own -14%
-
Other·F
Chief Financial Officer
$68.6K
4.8K sh · $14.30
Own -14%
-
Other·F
David W Moon KEY
President and CEO
$245.4K
17.2K sh · $14.30
Own -10%
-
Other·F
SVP, Water
$120.1K
8.4K sh · $14.30
Own -8%
-
Other·F
SVP, Water
$10.2K
694 sh · $14.65
Own -1%
-
Sell·S
Chief Legal Officer · 10b5-1
$105.8K
7.3K sh · $14.55
Own -7%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 15, 2026 | Colin R Sabol | Buy P | 11.2K | $99.3K |
| Jun 15, 2026 | Alexander J Buehler KEY | Exercise M | 15.3K | $131.8K |
| Jun 15, 2026 | Alexander J Buehler KEY | Sell S | 14.9K | $129.8K |
| Jun 15, 2026 | Alexander J Buehler KEY | Exercise M | 15.3K | $131.8K |
| Jun 4, 2026 | Pamela L. Tondreau | Grant A | 22.3K | $185.0K |
| Jun 4, 2026 | Arve Hanstveit | Grant A | 18.1K | $150.0K |
| Jun 4, 2026 | Colin R Sabol | Grant A | 18.1K | $150.0K |
| Jun 4, 2026 | Joan Kai Chow | Grant A | 18.1K | $150.0K |
| May 13, 2026 | Pamela L. Tondreau | Buy P | 20.0K | $166.8K |
| Apr 6, 2026 | Arve Hanstveit | Sell S | 2.4K | $24.9K |
| Apr 2, 2026 | Arve Hanstveit | Sell S | 165.3K | $1.7M |
| Mar 10, 2026 | Arve Hanstveit | Sell S | 25.0K | $274.0K |
| Mar 6, 2026 | Arve Hanstveit | Sell S | 11.6K | $122.9K |
| Mar 5, 2026 | Natarajan Ramanan | Sell S | 272 | $2.9K |
| Mar 5, 2026 | Arve Hanstveit | Sell S | 38.4K | $411.5K |
| Mar 4, 2026 | Rodney Clemente 10b5-1 | Sell S | 20.6K | $218.3K |
| Mar 3, 2026 | Natarajan Ramanan | Other F | 2.7K | $27.8K |
| Feb 17, 2026 | Matthew Hostetler | Grant A | 26.0K | $0 |
| Feb 17, 2026 | Michael S. Mancini KEY | Grant A | 45.6K | $0 |
| Feb 17, 2026 | William Yeung | Grant A | 26.0K | $0 |
| Feb 17, 2026 | Natarajan Ramanan | Grant A | 29.1K | $0 |
| Feb 17, 2026 | David W Moon KEY | Grant A | 81.8K | $0 |
| Feb 17, 2026 | Rodney Clemente | Grant A | 45.6K | $0 |
| Feb 6, 2026 | William Yeung 10b5-1 | Sell S | 646 | $9.8K |
| Feb 5, 2026 | William Yeung 10b5-1 | Sell S | 890 | $13.0K |
| Feb 5, 2026 | Rodney Clemente 10b5-1 | Sell S | 724 | $10.6K |
| Feb 2, 2026 | William Yeung 10b5-1 | Sell S | 729 | $10.5K |
| Jan 30, 2026 | William Yeung 10b5-1 | Other F | 8.6K | $123.3K |
| Jan 30, 2026 | William Yeung 10b5-1 | Other F | 1.0K | $14.7K |
| Jan 30, 2026 | Matthew Hostetler | Other F | 3.4K | $48.0K |
| Jan 30, 2026 | Michael S. Mancini KEY | Other F | 4.8K | $68.6K |
| Jan 30, 2026 | David W Moon KEY | Other F | 17.2K | $245.4K |
| Jan 30, 2026 | Rodney Clemente | Other F | 8.4K | $120.1K |
| Jan 30, 2026 | Rodney Clemente | Other F | 694 | $10.2K |
| Jan 28, 2026 | William Yeung 10b5-1 | Sell S | 7.3K | $105.8K |
About ERII insider trading
This page tracks insider transactions for Energy Recovery, Inc. (ERII) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.