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ESS Tech, Inc.

GWHWW
Exchange
OTC
Industry
Miscellaneous Electrical Machinery, Equipment & Supplies
SEC CIK
0001819438

In the last 90 days, ESS Tech, Inc. insiders filed 0 open-market purchases and 2 sales; no institution reported holding it in 13F filings for Q2 2026; no superinvestor holds it.

Other share classesGWH

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by ESS Tech, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
2 filings
2 insiders, $3.75K in total
Insiders trading
2
Net value
−$3.75K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for ESS Tech, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for ESS Tech, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Suhadolnik Kate EileenChief Financial Officer156,830Aug 24, 20265
Goodman Kelly F.SEE REMARKS205,220Aug 24, 20265
Buckley Drew PCEO25,000Jun 8, 20262
Nijhawan SandeepDirector42,563Jun 2, 20262
Garabedian RaffiDirector53,185Jun 2, 20262
Quarls HarryDirector68,769Jun 2, 20262
Wellman AlexiDirector52,399Jun 2, 20262
Hossfeld RichDirector41,372Jun 2, 20262
Niggli Michael RDirector90,825Oct 15, 20251
Teamey KyleDirector38,740Oct 15, 20251
Trivedi Jigish DhirajlalCOO275,000Sep 5, 20250
Rabb AnthonyChief Financial Officer109,392May 22, 20250
Dresselhuys Eric P.Chief Executive Officer180,580Nov 18, 20240
Evans Craig EPresident2,859,868IndirectMar 14, 20230
Moftakhar AmirChief Financial Officer558,850Oct 20, 20220
Song JuliaChief Technology Officer5,625,277Oct 19, 20220
Gast ClaudiaDirector59,694Jun 3, 20220
Wilson Daryl CDirector75,850Jun 3, 20220
Bodner JeffChief Accounting Officer54,900Feb 9, 20220
Breakthrough Energy Ventures, LLC10% Owner18,558,721Nov 12, 20210
Breakthrough Energy Investments LLC10% Owner18,558,721Nov 12, 20210
Softbank Group CorpDirector, 10% Owner35,953,699IndirectNov 12, 20210
Ginns Jonathan JDirector–Oct 13, 20210
Roush John AChief Financial Officer–Oct 13, 20210
Kriger Adam M.Chief Executive Officer–Oct 13, 20210
Levy Sarah KirshbaumDirector50,000Oct 13, 20210
ACON S2 Sponsor, L.L.C.10% Owner6,100,000Oct 13, 20210
Jinich DanielDirector–Oct 13, 20210
Shadrick-Wilson Ryan DDirector50,000Oct 13, 20210
Goddard JanieDirector50,000Oct 13, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 24, 2026 (view filing)4:10 PM ETAug 213 daysSuhadolnik Kate EileenChief Financial OfficerSSale−3.93K$0.4022−$1.58K−2.4%156.8K after
Aug 24, 2026 (view filing)4:08 PM ETAug 213 daysGoodman Kelly F.SEE REMARKSSSale−5.40K$0.4022−$2.17K−2.6%205.2K after
Jun 8, 2026 (view filing)Jun 44 daysBuckley Drew PCEOPPurchase+25.0K$1.03+$25.8KNew position25.0K after
May 26, 2026 (view filing)May 21-225 daysSuhadolnik Kate EileenChief Financial OfficerSSale−3.66K$0.9253−$3.38K−2.2%160.8K after2 lots
May 26, 2026 (view filing)May 21-225 daysGoodman Kelly F.SEE REMARKSSSale−5.23K$0.9253−$4.84K−2.4%210.6K after2 lots
Feb 26, 2026 (view filing)Feb 206 daysLateSuhadolnik Kate EileenChief Financial OfficerSSale−741$1.54−$1.14K−0.4%164.4K after
Feb 26, 2026 (view filing)Feb 206 daysLateGoodman Kelly F.SEE REMARKSSSale−2.27K$1.54−$3.49K−1.0%215.9K after
Nov 18, 2024 (view filing)Nov 18Same dayDresselhuys Eric P.Chief Executive OfficerPPurchase+1.00K$5.23+$5.23K+0.6%180.6K after
Sep 17, 2024 (view filing)Sep 116 daysLateNijhawan SandeepDirectorSSale−7.00K$5.72−$40.0K−31.1%15.5K after
Sep 3, 2024 (view filing)Aug 304 daysTeamey KyleDirectorPPurchase+142$6.73+$955.66+0.6%25.2K after
May 15, 2024 (view filing)May 141 dayTeamey KyleDirectorPPurchase+1.25K$0.79+$987.5+0.7%173.6K after
May 13, 2024 (view filing)May 103 daysQuarls HarryDirectorPPurchase+57.3K$0.79+$45.3K+15.7%423.5K after
May 9, 2024 (view filing)May 9Same dayQuarls HarryDirectorPPurchase+42.7K$0.84+$35.9K+13.2%366.1K after
Mar 18, 2024 (view filing)Mar 153 daysHossfeld RichDirectorPPurchase+2.50K$0.73+$1.82K+1.7%147.9K after2 lots
Nov 16, 2023 (view filing)Nov 16Same dayQuarls HarryDirectorPPurchase+5.49K$1.25+$6.86K+1.7%323.5K after
Nov 15, 2023 (view filing)Nov 15Same dayQuarls HarryDirectorPPurchase+67.1K$1.35+$90.6K+26.8%318.0K after
Nov 14, 2023 (view filing)Nov 14Same dayQuarls HarryDirectorPPurchase+80.6K$1.27+$102.3K+47.3%250.8K after
Nov 13, 2023 (view filing)Nov 13Same dayQuarls HarryDirectorPPurchase+46.8K$1.10+$51.5K+37.9%170.3K after
Nov 13, 2023 (view filing)Nov 13Same dayTeamey KyleDirectorPPurchase+1.00K$1.11+$1.11K+0.6%172.4K after
May 17, 2023 (view filing)May 161 dayNiggli Michael RDirectorPPurchase+10.0K$0.81+$8.10K+1.7%613.8K after
May 16, 2023 (view filing)May 16Same dayHossfeld RichDirectorPPurchase+10.0K$0.81+$8.10KNew position10.0K after
May 16, 2023 (view filing)May 151 dayTeamey KyleDirectorPPurchase+4.00K$0.84+$3.36K+12.5%36.0K after2 lots
May 15, 2023 (view filing)May 123 daysNiggli Michael RDirectorPPurchase+20.0K$1.13+$22.6K+3.4%603.8K after
Mar 7, 2023 (view filing)Mar 61 dayNiggli Michael RDirectorPPurchase+5.00K$1.65+$8.25K+0.9%583.8K after
Mar 7, 2023 (view filing)Mar 7Same dayTeamey KyleDirectorPPurchase+2.50K$1.61+$4.03K+8.5%32.0K after
Feb 23, 2023 (view filing)Feb 212 daysDresselhuys Eric P.Chief Executive OfficerSSale−23.4K$2.04−$47.8K−1.7%1.34M after
Feb 23, 2023 (view filing)Feb 212 daysEvans Craig EPresidentSSale−5.54K$2.04−$11.3K−0.1%5.56M after
Feb 23, 2023 (view filing)Feb 212 daysEvans Craig EPresidentSSale−4.92K$0.00$0−0.2%2.39M after
Dec 16, 2022 (view filing)Dec 151 dayNiggli Michael RDirectorPPurchase+19.1K$2.56+$48.9K+3.4%578.8K after
Nov 22, 2022 (view filing)Nov 211 dayDresselhuys Eric P.Chief Executive OfficerSSale−14.3K$3.82−$54.8K−1.0%1.37M after
Nov 22, 2022 (view filing)Nov 18-214 daysEvans Craig EPresidentSSale−56.4K$3.92−$220.8K−2.3%2.40M after2 lots
Nov 22, 2022 (view filing)Nov 211 dayEvans Craig EPresidentSSale−58.2K$3.56−$207.4K−1.0%5.58M after2 lots
Oct 20, 2022 (view filing)Oct 191 dayMoftakhar AmirChief Financial OfficerSSale−8.39K$3.48−$29.2K−1.5%558.9K after2 lots
Oct 19, 2022 (view filing)9:38 PM ETOct 172 daysSong Julia and 1 otherChief Technology OfficerSSale−12.6K$3.72−$47.0K−0.5%2.45M after
Oct 19, 2022 (view filing)9:38 PM ETOct 172 daysSong Julia and 1 otherChief Technology OfficerSSale−16.3K$3.72−$60.8K−0.3%5.63M after
Oct 19, 2022 (view filing)Oct 172 daysDresselhuys Eric P.Chief Executive OfficerSSale−110.1K$3.72−$409.5K−7.4%1.38M after4 lots
Oct 19, 2022 (view filing)Oct 172 daysMoftakhar AmirChief Financial OfficerSSale−16.7K$3.72−$62.2K−2.9%567.2K after
Oct 18, 2022 (view filing)Oct 171 dayMoftakhar AmirChief Financial OfficerSSale−63.2K$4.03−$254.7K−9.8%584.0K after
Mar 3, 2022 (view filing)Mar 12 daysNiggli Michael RDirectorPPurchase+20.0K$5.01+$100.2K+3.9%530.2K after
Jan 25, 2022 (view filing)4:10 PM ETJan 241 daySong Julia and 1 otherChief Technology OfficerSSale−1.34K$6.05−$8.12K0.0%5.37M after
Jan 25, 2022 (view filing)Jan 241 dayDresselhuys Eric P.Chief Executive OfficerSSale−59.6K$6.05−$360.8K−6.4%869.2K after