Energy Recovery, Inc.
Energy Recovery, Inc. (ERII) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · ERII · as of Jun 8, 2026
Activity summary
Buy transactions
1
P-Purchase only
Sell transactions
22
12 Months
Buy/Sell ratio
0.05
Buy/Sell (by trades)
Overall sentiment
Energy Recovery, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
ERII insider buying and selling by quarter
ERII insider selling · ERII insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · ERII ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
ERII executive sell shares · ERII board member insider trading · ERII insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Jun 4, 2026 | TONDREAU PAMELA L. Director | Award | 22,316 | $185K | Form 4 |
| Jun 4, 2026 | Chow Joan Kai Director | Award | 18,094 | $150K | Form 4 |
| Jun 4, 2026 | Sabol Colin R Director | Award | 18,094 | $150K | Form 4 |
| Jun 4, 2026 | Hanstveit Arve Director | Award | 18,094 | $150K | Form 4 |
| May 13, 2026 | TONDREAU PAMELA L. Director | Purchase | 20,000 | $167K | Form 4 |
| Apr 6, 2026 | Hanstveit Arve Director | Sale | 2,419 | $25K | Form 4 |
| Apr 2, 2026 | Hanstveit Arve Director | Sale | 165,292 | $1.68M⚡ | Form 4 |
| Mar 10, 2026 | Hanstveit Arve Director | Sale | 25,000 | $274K | Form 4 |
| Mar 5, 2026 | Hanstveit Arve Director | Sale | 38,418 | $411K | Form 4 |
| Mar 6, 2026 | Hanstveit Arve Director | Sale | 11,582 | $123K | Form 4 |
| Mar 4, 2026 | Clemente Rodney SVP, Water | Sale | 20,568 | $218K | Form 4 |
| Mar 5, 2026 | Ramanan Natarajan CTO | Sale | 272 | $3K | Form 4 |
| Mar 3, 2026 | Ramanan Natarajan CTO | Other | 2,724 | $28K | Form 4 |
| Feb 17, 2026 | Mancini Michael S. CFO | Award | 45,626 | — | Form 4 |
| Feb 17, 2026 | Moon David W President and CEO · Director | Award | 81,812 | — | Form 4 |
| Feb 17, 2026 | Yeung William Chief Legal Officer | Award | 25,959 | — | Form 4 |
| Feb 17, 2026 | Ramanan Natarajan CTO | Award | 29,106 | — | Form 4 |
| Feb 17, 2026 | Clemente Rodney SVP, Water | Award | 45,626 | — | Form 4 |
| Feb 17, 2026 | Hostetler Matthew Chief Human Resources Officer | Award | 25,959 | — | Form 4 |
| Feb 5, 2026 | Yeung William Chief Legal Officer | Sale | 890 | $13K | Form 4 |
| Feb 6, 2026 | Yeung William Chief Legal Officer | Sale | 646 | $10K | Form 4 |
| Feb 5, 2026 | Clemente Rodney SVP, Water | Sale | 724 | $11K | Form 4 |
| Jan 30, 2026 | Clemente Rodney SVP, Water | Other | 694 | $10K | Form 4 |
| Jan 30, 2026 | Clemente Rodney SVP, Water | Other | 8,397 | $120K | Form 4 |
| Jan 30, 2026 | Hostetler Matthew Chief Human Resources Officer | Other | 3,359 | $48K | Form 4 |
Moon David W
President and CEO · Director
Date
Feb 17
Shares
81,812
Price
—
Value
—
Hostetler Matthew
Chief Human Resources Officer
Date
Feb 17
Shares
25,959
Price
—
Value
—
Hostetler Matthew
Chief Human Resources Officer
Date
Jan 30
Shares
3,359
Price
$14.30
Value
$48K
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About ERII insider trading
ERII insider trades
Energy Recovery, Inc. (ERII) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Yeung William (Chief Legal Officer), Hanstveit Arve (Director), Clemente Rodney (SVP, Water). Over the past 12 months, 5 insiders have filed transactions with the SEC. ERII insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Energy Recovery, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
ERII insider trading · 5 questionsThe insiders of Energy Recovery, Inc. (ERII) include executives and directors such as Yeung William (Chief Legal Officer), Hanstveit Arve (Director), Clemente Rodney (SVP, Water), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026