William Yeung is CLO at Energy Recovery, Inc. (ERII). They have made 14 open-market trades across 1 company since 2016, most recently 2026-07-28.
CIK 0001677876
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
2 open-market purchases totalling $73K since 2016, against 12 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ERII | 99,291 | $661K |
Shares reported on the most recent Form 4, priced at the 2026-07-29 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ERII | SELL · 10b5-1 | 2026-07-28 | 2026-07-29 | $8.56 | $18K | -2.7% | -5.3% | — |
| ERII | SELL | 2026-02-05 | 2026-02-09 | $14.82 | $23K | +3.1% | -31.6% | -44.7% |
| ERII | SELL | 2026-01-28 | 2026-02-03 | $14.54 | $116K | +4.0% | -28.5% | -26.7% |
| ERII | SELL · 10b5-1 | 2025-10-23 | 2025-10-27 | $17.86 | $227K | -17.3% | -18.0% | -18.3% |
| ERII | SELL · 10b5-1 | 2025-10-20 | 2025-10-22 | $17.00 | $60K | -2.8% | -21.2% | -19.2% |
| ERII | SELL · 10b5-1 | 2025-10-16 | 2025-10-17 | $16.50 | $58K | +1.5% | -14.3% | -15.4% |
| ERII | SELL · 10b5-1 | 2025-10-03 | 2025-10-07 | $16.00 | $57K | +7.6% | -6.9% | -8.0% |
| ERII | SELL · 10b5-1 | 2025-09-18 | 2025-09-22 | $15.09 | $466K | +5.4% | +14.4% | -7.1% |
| ERII | SELL · 10b5-1 | 2025-09-11 | 2025-09-15 | $14.51 | $974K | +3.7% | +11.2% | -1.2% |
| ERII | SELL | 2024-07-29 | 2024-07-30 | $14.63 | $29K | +15.1% | +13.6% | +24.3% |
| ERII | SELL | 2024-03-11 | 2024-03-13 | $14.98 | $15K | +2.4% | -2.6% | -7.5% |
| ERII | SELL | 2024-02-05 | 2024-02-07 | $14.89 | $15K | +3.4% | +0.3% | -8.5% |
| ERII | SELL | 2024-02-01 | 2024-02-05 | $15.42 | $33K | +12.3% | +7.0% | -7.1% |
| ERII | SELL | 2024-01-30 | 2024-02-01 | $15.91 | $13K | -0.2% | +3.2% | -3.6% |
| ERII | SELL | 2023-08-28 | 2023-08-29 | $27.75 | $2.3M | -13.1% | -25.6% | -32.6% |
| ERII | SELL | 2023-03-09 | 2023-03-13 | $23.99 | $21K | -5.4% | +7.9% | +18.8% |
| ERII | SELL | 2023-02-03 | 2023-02-07 | $22.75 | $19K | -2.5% | +4.5% | +6.0% |
| ERII | SELL | 2023-02-01 | 2023-02-03 | $22.48 | $149K | -0.6% | +5.5% | +2.8% |
| ERII | SELL | 2022-06-15 | 2022-06-17 | $19.07 | $48K | +2.0% | +0.7% | +33.5% |
| ERII | BUY | 2017-03-14 | 2017-03-14 | $7.58 | $25K | -2.5% | +3.3% | +5.6% |
| ERII | BUY | 2016-11-08 | 2016-11-09 | $10.10 | $48K | +9.0% | +0.1% | -7.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.