Form4insider filings, from the source

Company · CIK 0001819438 · SIC 3690 — Miscellaneous Electrical Machinery, Equipment & Supplies · NYSE

ESS Tech, Inc. · GWH

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $26k · 1sales $3,751 · 2net $22k
$10k$10k$100k$100k$1M$1MbuyssalesJun 3Jun 16Jun 29Jul 13Jul 26Aug 8Aug 22

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 21, 2026 SForm 4 →Aug 24, 4:10 pm EDTKate Eileen SuhadolnikChief Financial Officer3,927$0.4022$1,579156,830−2.44%
Aug 21, 2026 SForm 4 →Aug 24, 4:08 pm EDTKelly F. GoodmanSEE REMARKS5,400$0.4022$2,172205,220−2.56%
Jun 4, 2026 PForm 4 →Jun 8, 5:40 pm EDTDrew P BuckleyCEO, Director25,000$1.03$25,66025,000—

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.