Yeung William Insider Trading Activity
Yeung William has been net-selling over the last 12 months with 0 purchases and 13 sales across 1 company.
ERII is the most-traded position with 13 trades. The largest single transaction was a sale of ERII for $487K on Sep 11, 2025.
Performance Scorecard
Forward stock performance after each transaction by Yeung William. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | +13.1% | 69% | 13 |
| 90 days | — | +17.5% | 100% | 13 |
| 120 days | — | +18.3% | 100% | 13 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersERII · Energy Recovery, Inc.
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Feb 6, 2026 | ERII | Sell | 646 | $15.14 | $10K | −0.8% | Chief Legal Officer | |
Feb 5, 2026 | ERII | Sell | 890 | $14.59 | $13K | −1.1% | Chief Legal Officer | |
Feb 2, 2026 | ERII | Sell | 729 | $14.46 | $11K | −0.9% | Chief Legal Officer | |
Jan 28, 2026 Filed 4d late | ERII | Sell | 7,271 | $14.55 | $106K | −7.5% | Chief Legal Officer | |
Oct 24, 2025 | ERII | Sell | 3,530 | $18.00 | $64K | −3.5% | Chief Legal Officer | |
Oct 24, 2025 | ERII | Sell | 5,638 | $18.00 | $101K | −5.5% | Chief Legal Officer | |
Oct 23, 2025 | ERII | Sell | 3,530 | $17.50 | $62K | −3.5% | Chief Legal Officer | |
Oct 20, 2025 | ERII | Sell | 3,530 | $17.00 | $60K | −3.5% | Chief Legal Officer | |
Oct 16, 2025 | ERII | Sell | 3,530 | $16.50 | $58K | −3.5% | Chief Legal Officer | |
Oct 3, 2025 | ERII | Sell | 1,038 | $16.00 | $17K | −1.1% | Chief Legal Officer | |
Oct 3, 2025 | ERII | Sell | 2,529 | $16.00 | $40K | −2.5% | Chief Legal Officer | |
Sep 18, 2025 | ERII | Sell | 15,454 | $15.09 | $233K | −13.7% | Chief Legal Officer | |
Sep 11, 2025 | ERII | Sell | 33,554 | $14.51 | $487K | −25.6% | Chief Legal Officer |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| ERII | Energy Recovery, Inc. | 13 | $1.3M |
Other insiders at Energy Recovery, Inc.
2 other tracked filers at ERII.