Insider · CIK 0001677876
William Yeung
Files at ERII (Energy Recovery, Inc.). First filing Sep 15, 2025, latest Jul 29, 2026.
In brief
William Yeung files SEC Form 4 as officer at ERII (Energy Recovery, Inc.). Since Sep 15, 2025, William Yeung has reported 0 open-market buys worth $0 and 9 open-market sells worth $1.3M, the latest filed on Jul 29, 2026.
A track record needs three past buys with six months of prices behind them; William Yeung has 0, so none is measured yet.
The newest scored trade: sold $18k of ERII on Jul 28, 2026, filed Jul 29, 2026, scored 3 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 6 sells worth $502k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
ERII: Energy Recovery, Inc.
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
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 3Weak | Energy Recovery, Inc. | $18k 2,048 shares | -2% | +6% from low-54% from high | |
| 3Weak | Energy Recovery, Inc. | $23k 1,536 shares | -2% | +33% from low-17% from high | |
| 13Weak | Energy Recovery, Inc. | $116k 8,000 shares | -8% | +29% from low-19% from high | |
| 0Weak | Energy Recovery, Inc. | $227k 12,698 shares | -13% | +57% from low-10% from high | |
| 0Weak | Energy Recovery, Inc. | $60k 3,530 shares | -3% | +50% from low-15% from high | |
| 0Weak | Energy Recovery, Inc. | $58k 3,530 shares | -3% | +47% from low-16% from high | |
| 0Weak | Energy Recovery, Inc. | $57k 3,567 shares | -4% | +39% from low-21% from high | |
| 0Weak | Energy Recovery, Inc. | $233k 15,454 shares | -14% | +33% from low-24% from high | |
| 8Weak | Energy Recovery, Inc. | $487k 33,554 shares | -26% | +28% from low-27% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Jul 28, 2026 | ERII Energy Recovery, Inc. | 2,048 0.00% of outstanding | $18k | Jul 28, 2026 | none |
| Feb 6, 2026 | ERII Energy Recovery, Inc. | 646 0.00% of outstanding | $9,780 | Feb 6, 2026 | $116k |
| Feb 2, 2026 | ERII Energy Recovery, Inc. | 729 0.00% of outstanding | $11k | Feb 2, 2026 | $106k |
| Jan 28, 2026 | ERII Energy Recovery, Inc. | 7,271 0.01% of outstanding | $106k | Jan 28, 2026 | $89k |
| Jan 27, 2026 | ERII Energy Recovery, Inc. | 6,181 0.01% of outstanding | $89k | Jan 27, 2026 | none |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | 9,168 0.02% of outstanding | $165k | Oct 24, 2025 | $957k |
| Oct 23, 2025 | ERII Energy Recovery, Inc. | 3,530 0.01% of outstanding | $62k | Oct 23, 2025 | $896k |
| Oct 20, 2025 | ERII Energy Recovery, Inc. | 3,530 0.01% of outstanding | $60k | Oct 20, 2025 | $836k |
| Oct 16, 2025 | ERII Energy Recovery, Inc. | 3,530 0.01% of outstanding | $58k | Oct 16, 2025 | $777k |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | 3,567 0.01% of outstanding | $57k | Oct 3, 2025 | $720k |
| Sep 18, 2025 | ERII Energy Recovery, Inc. | 15,454 0.03% of outstanding | $233k | Sep 18, 2025 | $276k |
| Sep 11, 2025 | ERII Energy Recovery, Inc. | 33,554 0.06% of outstanding | $487k | Sep 11, 2025 | none |
| Mar 11, 2024 | ERII Energy Recovery, Inc. | 978 0.00% of outstanding | $15k | Mar 11, 2024 | $61k |
| Feb 5, 2024 | ERII Energy Recovery, Inc. | 1,013 0.00% of outstanding | $15k | Feb 5, 2024 | $46k |
| Feb 2, 2024 | ERII Energy Recovery, Inc. | 1,400 0.00% of outstanding | $21k | Feb 2, 2024 | $25k |
| Feb 1, 2024 | ERII Energy Recovery, Inc. | 733 0.00% of outstanding | $11k | Feb 1, 2024 | $13k |
| Jan 30, 2024 | ERII Energy Recovery, Inc. | 823 0.00% of outstanding | $13k | Jan 30, 2024 | none |
Transactions
Every row this insider has filed, 43 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jul 27, 2026 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -2,828 | $8.42 | $24k | 101,339 | Jul 29, 2026 |
| Jul 28, 2026 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -2,048 | $8.56 | $18k | 99,291 | Jul 29, 2026 |
| Feb 17, 2026 | ERII Energy Recovery, Inc. | AGrant or award Common Stock | +25,959 | $0.00 | $0 | 104,167 | Feb 19, 2026 |
| Feb 5, 2026 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -890 | $14.59 | $13k | 78,854 | Feb 9, 2026 |
| Feb 6, 2026 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -646 | $15.14 | $9,780 | 78,208 | Feb 9, 2026 |
| Jan 28, 2026 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -7,271 | $14.55 | $106k | 90,098 | Feb 3, 2026 |
| Jan 30, 2026 | ERII Energy Recovery, Inc. | FTax withholding Common Stock10b5-1 | -1,003 | $14.65 | $15k | 89,095 | Feb 3, 2026 |
| Jan 30, 2026 | ERII Energy Recovery, Inc. | FTax withholding Common Stock10b5-1 | -8,622 | $14.30 | $123k | 80,473 | Feb 3, 2026 |
| Feb 2, 2026 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -729 | $14.46 | $11k | 79,744 | Feb 3, 2026 |
| Oct 23, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +3,530 | $7.50 | $26k | 100,899 | Oct 27, 2025 |
| Oct 23, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -3,530 | $17.50 | $62k | 97,369 | Oct 27, 2025 |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +5,638 | $10.19 | $57k | 103,007 | Oct 27, 2025 |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -5,638 | $18.00 | $101k | 97,369 | Oct 27, 2025 |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +3,530 | $7.50 | $26k | 100,899 | Oct 27, 2025 |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -3,530 | $18.00 | $64k | 97,369 | Oct 27, 2025 |
| Oct 23, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -3,530 | $7.50 | $26k | 17,650 | Oct 27, 2025 |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -5,638 | $10.19 | $57k | 16,229 | Oct 27, 2025 |
| Oct 24, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -3,530 | $7.50 | $26k | 14,120 | Oct 27, 2025 |
| Oct 20, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +3,530 | $7.50 | $26k | 100,899 | Oct 22, 2025 |
| Oct 20, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -3,530 | $17.00 | $60k | 97,369 | Oct 22, 2025 |
| Oct 20, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -3,530 | $7.50 | $26k | 21,180 | Oct 22, 2025 |
| Oct 16, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +3,530 | $7.50 | $26k | 100,899 | Oct 17, 2025 |
| Oct 16, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -3,530 | $16.50 | $58k | 97,369 | Oct 17, 2025 |
| Oct 16, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -3,530 | $7.50 | $26k | 24,710 | Oct 17, 2025 |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +1,038 | $7.50 | $7,785 | 98,407 | Oct 7, 2025 |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -1,038 | $16.00 | $17k | 97,369 | Oct 7, 2025 |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +2,529 | $7.50 | $19k | 99,898 | Oct 7, 2025 |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -2,529 | $16.00 | $40k | 97,369 | Oct 7, 2025 |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -1,038 | $7.50 | $7,785 | 30,769 | Oct 7, 2025 |
| Oct 3, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -2,529 | $7.50 | $19k | 28,240 | Oct 7, 2025 |
| Sep 18, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +15,454 | $8.95 | $138k | 112,823 | Sep 22, 2025 |
| Sep 18, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -15,454 | $15.09 | $233k | 97,369 | Sep 22, 2025 |
| Sep 18, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -15,454 | $8.95 | $138k | 0 | Sep 22, 2025 |
| Sep 11, 2025 | ERII Energy Recovery, Inc. | MOption exercise Common Stock10b5-1 | +30,877 | $8.95 | $276k | 130,923 | Sep 15, 2025 |
| Sep 11, 2025 | ERII Energy Recovery, Inc. | SOpen-market sale Common Stock10b5-1 | -33,554 | $14.51 | $487k | 97,369 | Sep 15, 2025 |
| Sep 11, 2025 | ERII Energy Recovery, Inc. | MOption exercise Employee Stock Option (Right to Buy)derivative10b5-1 | -30,877 | $8.95 | $276k | 15,454 | Sep 15, 2025 |
| Jul 25, 2025 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -1,989 | $13.88 | $28k | 100,046 | Jul 29, 2025 |
| Mar 10, 2025 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -944 | $16.37 | $15k | 102,035 | Mar 12, 2025 |
| Feb 3, 2025 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -882 | $14.34 | $13k | 102,979 | Feb 5, 2025 |
| Jan 30, 2025 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -698 | $14.33 | $10k | 104,488 | Feb 3, 2025 |
| Jan 31, 2025 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -627 | $14.56 | $9,129 | 103,861 | Feb 3, 2025 |
| Jan 27, 2025 | ERII Energy Recovery, Inc. | FTax withholding Common Stock | -4,061 | $14.40 | $58k | 105,186 | Jan 29, 2025 |
| Jan 23, 2025 | ERII Energy Recovery, Inc. | AGrant or award Common Stock | +23,956 | $0.00 | $0 | 109,247 | Jan 27, 2025 |
Questions about William Yeung
Answered from the filings on this page, as of the latest one.
Is William Yeung buying or selling?
In the last 12 months William Yeung reported 0 open-market buys worth $0 and 6 open-market sells worth $502k on SEC Form 4; the latest was sold $18k of ERII on Jul 28, 2026. Grants, option exercises and tax withholding are not counted.
How did William Yeung's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and William Yeung has 0.
Where does William Yeung file Form 4?
William Yeung has filed Form 4 at ERII (Energy Recovery, Inc.) as Chief Legal Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.