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WY

William Yeung

ERII
CHIEF LEGAL OFFICER · ENERGY RECOVERY, INC. · CIK 0001677876
FILING MIX · LIFETIME30%/70%
BUYS
21
SELLS
50
TOTAL VALUE
$5.39M
COMPANIES
1
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
99,291
AVG SELL PX
$15.47
TRADE KIND
SHOWING 71 / 71
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
25 backtested trades · 8 horizons · 26 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by William Yeung, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d25+52.00%-0.30%-0.04%-0.26%-0.44%—
14d25+40.00%-0.85%+0.25%-1.10%+0.12%—
30d25+52.00%-7.25%+0.41%-7.66%-3.87%—
60d25+68.00%-10.02%+1.55%-11.58%-9.43%—
90d25+84.00%-9.93%+3.31%-13.24%-16.36%—
180d25+76.00%-17.16%+7.83%-24.99%-33.11%—
1y25(13 pending)+75.00%-12.25%+22.22%-34.47%-32.77%—
2y25(13 pending)+91.67%-25.45%+44.89%-70.35%-79.26%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
ERII · 99,291 shares · as of Jul 28, 2026
032,73165,46298,192130,923202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
2026
FLOW · 21 buys / 50 sellsCOVERAGE · 27 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
2,048$8.56$17.5K99,291Jul 28, 2026Jul 29, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,828$8.42$23.8K101,339Jul 27, 2026Jul 29, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
25,959——104,167Feb 17, 2026Feb 19, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
646$15.14$9.8K78,208Feb 6, 2026Feb 9, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
890$14.59$13.0K78,854Feb 5, 2026Feb 9, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
729$14.46$10.5K79,744Feb 2, 2026Feb 3, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
8,622$14.30$123.3K80,473Jan 30, 2026Feb 3, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,003$14.65$14.7K89,095Jan 30, 2026Feb 3, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
7,271$14.55$105.8K90,098Jan 28, 2026Feb 3, 2026 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
5,638$10.19$57.5K103,007Oct 24, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
3,530$7.50$26.5K100,899Oct 24, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
3,530$18.00$63.5K97,369Oct 24, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
5,638$10.19$57.5K16,229Oct 24, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
5,638$18.00$101.5K97,369Oct 24, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
3,530$7.50$26.5K14,120Oct 24, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
3,530$7.50$26.5K17,650Oct 23, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
3,530$17.50$61.8K97,369Oct 23, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
3,530$7.50$26.5K100,899Oct 23, 2025Oct 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
3,530$17.00$60.0K97,369Oct 20, 2025Oct 22, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
3,530$7.50$26.5K100,899Oct 20, 2025Oct 22, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
3,530$7.50$26.5K21,180Oct 20, 2025Oct 22, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
3,530$16.50$58.2K97,369Oct 16, 2025Oct 17, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
3,530$7.50$26.5K24,710Oct 16, 2025Oct 17, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
3,530$7.50$26.5K100,899Oct 16, 2025Oct 17, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,529$16.00$40.5K97,369Oct 3, 2025Oct 7, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
2,529$7.50$19.0K99,898Oct 3, 2025Oct 7, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,038$16.00$16.6K97,369Oct 3, 2025Oct 7, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,038$7.50$7.8K30,769Oct 3, 2025Oct 7, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,529$7.50$19.0K28,240Oct 3, 2025Oct 7, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
1,038$7.50$7.8K98,407Oct 3, 2025Oct 7, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
15,454$8.95$138.3K112,823Sep 18, 2025Sep 22, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
15,454$15.09$233.1K97,369Sep 18, 2025Sep 22, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
15,454$8.95$138.3K0Sep 18, 2025Sep 22, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE10b5-1
10b5-1 plan
33,554$14.51$486.9K97,369Sep 11, 2025Sep 15, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
30,877$8.95$276.3K15,454Sep 11, 2025Sep 15, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASE
Chief Legal Officer
30,877$8.95$276.3K130,923Sep 11, 2025Sep 15, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,989$13.88$27.6K100,046Jul 25, 2025Jul 29, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
944$16.37$15.5K102,035Mar 10, 2025Mar 12, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
882$14.34$12.6K102,979Feb 3, 2025Feb 5, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
627$14.56$9.1K103,861Jan 31, 2025Feb 3, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
698$14.33$10.0K104,488Jan 30, 2025Feb 3, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
4,061$14.40$58.5K105,186Jan 27, 2025Jan 29, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
23,956——109,247Jan 23, 2025Jan 27, 2025 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,012$14.63$29.4K85,291Jul 29, 2024Jul 30, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
978$14.98$14.7K87,303Mar 11, 2024Mar 13, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,013$14.89$15.1K88,281Feb 5, 2024Feb 7, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,400$15.30$21.4K89,294Feb 2, 2024Feb 5, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
733$15.64$11.5K90,694Feb 1, 2024Feb 5, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
823$15.91$13.1K91,427Jan 30, 2024Feb 1, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
39,542——92,250Jan 25, 2024Jan 29, 2024 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
40,614$27.75$1.13M52,708Aug 28, 2023Aug 29, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
16,674——93,322Jul 25, 2023Jul 27, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
882$23.99$21.2K76,648Mar 9, 2023Mar 13, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
836$22.75$19.0K77,530Feb 3, 2023Feb 7, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,913$22.57$65.8K78,366Feb 2, 2023Feb 3, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
794$21.79$17.3K81,279Feb 1, 2023Feb 3, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
7,006$21.41$150.0K82,073Jan 30, 2023Feb 1, 2023 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,500$19.07$47.7K5,568Jun 15, 2022Jun 17, 2022 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
7,911$18.96$150.0K75,067Mar 7, 2022Mar 15, 2022 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
2,445$19.65$48.0K67,156Feb 2, 2022Feb 3, 2022 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
3,132$19.57$61.3K69,601Feb 1, 2022Feb 3, 2022 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
7,898——72,733Jan 28, 2022Feb 1, 2022 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
20,293$18.99$385.4K20,293Jan 28, 2022Feb 1, 2022 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
1,182$13.81$16.3K64,835Feb 3, 2021Feb 3, 2021 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
Chief Legal Officer
4,878$13.97$68.1K66,017Feb 2, 2021Feb 3, 2021 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
9,849$13.96$137.5K70,895Feb 1, 2021Feb 3, 2021 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
26,336——26,336Feb 1, 2021Feb 3, 2021 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
General Counsel
3,272$10.41$34.0K61,046Feb 4, 2020Feb 5, 2020 ↗View →
ERII
ENERGY RECOVERY, INC.
SALE
General Counsel
1,851$10.24$19.0K64,318Feb 3, 2020Feb 5, 2020 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
13,467$10.21$137.5K66,169Jan 31, 2020Feb 4, 2020 ↗View →
ERII
ENERGY RECOVERY, INC.
PURCHASEGRANT
Stock grant
23,027——23,027Jan 31, 2020Feb 4, 2020 ↗View →
Other insiders · ERII
Loading peer insiders…
About this filer
CIK 0001677876
ROLE
Chief Legal Officer
PRIMARY
ERII
COMPANIES
1
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0001677876DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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