MarketPeel
Insider Trading Intelligence
KS

Kate Eileen Suhadolnik

GWH
INTERIM CFO · ESS TECH, INC. · CIK 0002083724
FILING MIX · LIFETIME29%/71%
BUYS
2
SELLS
5
TOTAL VALUE
$9.6K
COMPANIES
1
ACTIVE SINCE
Aug 2025
HOLDINGS NOW
160,757
AVG SELL PX
$1.39
TRADE KIND
SHOWING 7 / 7
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Kate Eileen Suhadolnik, 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
7d1+0.00%+3.25%-0.50%+3.75%+3.75%
14d1+100.00%-15.58%-2.47%-13.11%-13.11%
30d1+100.00%-23.38%-4.94%-18.44%-18.44%
60d1+100.00%-27.27%+2.13%-29.40%-29.40%
90d1+100.00%-44.00%
180d1(1 pending)
1y1(1 pending)
2y1(1 pending)
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
GWH · 160,757 shares · as of May 22, 2026
041,28982,578123,866165,1552026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2025
2025
2026
2026
FLOW · 2 buys / 5 sellsCOVERAGE · 4 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
GWH
ESS TECH, INC.
SALE
Chief Financial Officer
1,922$0.93$1.8K160,757May 22, 2026May 26, 2026View →
GWH
ESS TECH, INC.
SALE
Chief Financial Officer
1,735$0.92$1.6K162,679May 21, 2026May 26, 2026View →
GWH
ESS TECH, INC.
SALE
Chief Financial Officer
741$1.54$1.1K164,414Feb 20, 2026Feb 26, 2026View →
GWH
ESS TECH, INC.
PURCHASEGRANT
Stock grant
137,500165,155Feb 13, 2026Feb 26, 2026View →
GWH
ESS TECH, INC.
PURCHASEGRANT
Stock grant
137,500137,500Feb 13, 2026Feb 26, 2026View →
GWH
ESS TECH, INC.
SALE
Interim CFO
1,299$2.40$3.1K27,655Nov 20, 2025Nov 20, 2025View →
GWH
ESS TECH, INC.
SALE
Interim CFO
1,232$1.61$2.0K28,954Aug 20, 2025Aug 29, 2025View →
Other insiders · GWH
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About this filer
CIK 0002083724
ROLE
Interim CFO
PRIMARY
GWH
COMPANIES
1
ACTIVE SINCE
Aug 2025
MARKETPEEL · /INSIDER/0002083724DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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