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.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Suhadolnik Kate Eileen | Chief Financial Officer | 156,830 | Aug 24, 2026 | 5 |
| Goodman Kelly F. | SEE REMARKS | 205,220 | Aug 24, 2026 | 5 |
| Buckley Drew P | CEO | 25,000 | Jun 8, 2026 | 2 |
| Nijhawan Sandeep | Director | 42,563 | Jun 2, 2026 | 2 |
| Garabedian Raffi | Director | 53,185 | Jun 2, 2026 | 2 |
| Quarls Harry | Director | 68,769 | Jun 2, 2026 | 2 |
| Wellman Alexi | Director | 52,399 | Jun 2, 2026 | 2 |
| Hossfeld Rich | Director | 41,372 | Jun 2, 2026 | 2 |
| Niggli Michael R | Director | 90,825 | Oct 15, 2025 | 1 |
| Teamey Kyle | Director | 38,740 | Oct 15, 2025 | 1 |
| Trivedi Jigish Dhirajlal | COO | 275,000 | Sep 5, 2025 | 0 |
| Rabb Anthony | Chief Financial Officer | 109,392 | May 22, 2025 | 0 |
| Dresselhuys Eric P. | Chief Executive Officer | 180,580 | Nov 18, 2024 | 0 |
| Evans Craig E | President | 2,859,868Indirect | Mar 14, 2023 | 0 |
| Moftakhar Amir | Chief Financial Officer | 558,850 | Oct 20, 2022 | 0 |
| Song Julia | Chief Technology Officer | 5,625,277 | Oct 19, 2022 | 0 |
| Gast Claudia | Director | 59,694 | Jun 3, 2022 | 0 |
| Wilson Daryl C | Director | 75,850 | Jun 3, 2022 | 0 |
| Bodner Jeff | Chief Accounting Officer | 54,900 | Feb 9, 2022 | 0 |
| Breakthrough Energy Ventures, LLC | 10% Owner | 18,558,721 | Nov 12, 2021 | 0 |
| Breakthrough Energy Investments LLC | 10% Owner | 18,558,721 | Nov 12, 2021 | 0 |
| Softbank Group Corp | Director, 10% Owner | 35,953,699Indirect | Nov 12, 2021 | 0 |
| Ginns Jonathan J | Director | – | Oct 13, 2021 | 0 |
| Roush John A | Chief Financial Officer | – | Oct 13, 2021 | 0 |
| Kriger Adam M. | Chief Executive Officer | – | Oct 13, 2021 | 0 |
| Levy Sarah Kirshbaum | Director | 50,000 | Oct 13, 2021 | 0 |
| ACON S2 Sponsor, L.L.C. | 10% Owner | 6,100,000 | Oct 13, 2021 | 0 |
| Jinich Daniel | Director | – | Oct 13, 2021 | 0 |
| Shadrick-Wilson Ryan D | Director | 50,000 | Oct 13, 2021 | 0 |
| Goddard Janie | Director | 50,000 | Oct 13, 2021 | 0 |
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.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 24, 2026 (view filing)4:10 PM ET | Aug 21 | 3 days | Suhadolnik Kate EileenChief Financial Officer | SSale | −3.93K | $0.4022 | −$1.58K | −2.4%156.8K after | |
| Aug 24, 2026 (view filing)4:08 PM ET | Aug 21 | 3 days | Goodman Kelly F.SEE REMARKS | SSale | −5.40K | $0.4022 | −$2.17K | −2.6%205.2K after | |
| Jun 8, 2026 (view filing) | Jun 4 | 4 days | Buckley Drew PCEO | PPurchase | +25.0K | $1.03 | +$25.8K | New position25.0K after | |
| May 26, 2026 (view filing) | May 21-22 | 5 days | Suhadolnik Kate EileenChief Financial Officer | SSale | −3.66K | $0.9253 | −$3.38K | −2.2%160.8K after | 2 lots |
| May 26, 2026 (view filing) | May 21-22 | 5 days | Goodman Kelly F.SEE REMARKS | SSale | −5.23K | $0.9253 | −$4.84K | −2.4%210.6K after | 2 lots |
| Feb 26, 2026 (view filing) | Feb 20 | 6 daysLate | Suhadolnik Kate EileenChief Financial Officer | SSale | −741 | $1.54 | −$1.14K | −0.4%164.4K after | |
| Feb 26, 2026 (view filing) | Feb 20 | 6 daysLate | Goodman Kelly F.SEE REMARKS | SSale | −2.27K | $1.54 | −$3.49K | −1.0%215.9K after | |
| Nov 18, 2024 (view filing) | Nov 18 | Same day | Dresselhuys Eric P.Chief Executive Officer | PPurchase | +1.00K | $5.23 | +$5.23K | +0.6%180.6K after | |
| Sep 17, 2024 (view filing) | Sep 11 | 6 daysLate | Nijhawan SandeepDirector | SSale | −7.00K | $5.72 | −$40.0K | −31.1%15.5K after | |
| Sep 3, 2024 (view filing) | Aug 30 | 4 days | Teamey KyleDirector | PPurchase | +142 | $6.73 | +$955.66 | +0.6%25.2K after | |
| May 15, 2024 (view filing) | May 14 | 1 day | Teamey KyleDirector | PPurchase | +1.25K | $0.79 | +$987.5 | +0.7%173.6K after | |
| May 13, 2024 (view filing) | May 10 | 3 days | Quarls HarryDirector | PPurchase | +57.3K | $0.79 | +$45.3K | +15.7%423.5K after | |
| May 9, 2024 (view filing) | May 9 | Same day | Quarls HarryDirector | PPurchase | +42.7K | $0.84 | +$35.9K | +13.2%366.1K after | |
| Mar 18, 2024 (view filing) | Mar 15 | 3 days | Hossfeld RichDirector | PPurchase | +2.50K | $0.73 | +$1.82K | +1.7%147.9K after | 2 lots |
| Nov 16, 2023 (view filing) | Nov 16 | Same day | Quarls HarryDirector | PPurchase | +5.49K | $1.25 | +$6.86K | +1.7%323.5K after | |
| Nov 15, 2023 (view filing) | Nov 15 | Same day | Quarls HarryDirector | PPurchase | +67.1K | $1.35 | +$90.6K | +26.8%318.0K after | |
| Nov 14, 2023 (view filing) | Nov 14 | Same day | Quarls HarryDirector | PPurchase | +80.6K | $1.27 | +$102.3K | +47.3%250.8K after | |
| Nov 13, 2023 (view filing) | Nov 13 | Same day | Quarls HarryDirector | PPurchase | +46.8K | $1.10 | +$51.5K | +37.9%170.3K after | |
| Nov 13, 2023 (view filing) | Nov 13 | Same day | Teamey KyleDirector | PPurchase | +1.00K | $1.11 | +$1.11K | +0.6%172.4K after | |
| May 17, 2023 (view filing) | May 16 | 1 day | Niggli Michael RDirector | PPurchase | +10.0K | $0.81 | +$8.10K | +1.7%613.8K after | |
| May 16, 2023 (view filing) | May 16 | Same day | Hossfeld RichDirector | PPurchase | +10.0K | $0.81 | +$8.10K | New position10.0K after | |
| May 16, 2023 (view filing) | May 15 | 1 day | Teamey KyleDirector | PPurchase | +4.00K | $0.84 | +$3.36K | +12.5%36.0K after | 2 lots |
| May 15, 2023 (view filing) | May 12 | 3 days | Niggli Michael RDirector | PPurchase | +20.0K | $1.13 | +$22.6K | +3.4%603.8K after | |
| Mar 7, 2023 (view filing) | Mar 6 | 1 day | Niggli Michael RDirector | PPurchase | +5.00K | $1.65 | +$8.25K | +0.9%583.8K after | |
| Mar 7, 2023 (view filing) | Mar 7 | Same day | Teamey KyleDirector | PPurchase | +2.50K | $1.61 | +$4.03K | +8.5%32.0K after | |
| Feb 23, 2023 (view filing) | Feb 21 | 2 days | Dresselhuys Eric P.Chief Executive Officer | SSale | −23.4K | $2.04 | −$47.8K | −1.7%1.34M after | |
| Feb 23, 2023 (view filing) | Feb 21 | 2 days | Evans Craig EPresident | SSale | −5.54K | $2.04 | −$11.3K | −0.1%5.56M after | |
| Feb 23, 2023 (view filing) | Feb 21 | 2 days | Evans Craig EPresident | SSale | −4.92K | $0.00 | $0 | −0.2%2.39M after | |
| Dec 16, 2022 (view filing) | Dec 15 | 1 day | Niggli Michael RDirector | PPurchase | +19.1K | $2.56 | +$48.9K | +3.4%578.8K after | |
| Nov 22, 2022 (view filing) | Nov 21 | 1 day | Dresselhuys Eric P.Chief Executive Officer | SSale | −14.3K | $3.82 | −$54.8K | −1.0%1.37M after | |
| Nov 22, 2022 (view filing) | Nov 18-21 | 4 days | Evans Craig EPresident | SSale | −56.4K | $3.92 | −$220.8K | −2.3%2.40M after | 2 lots |
| Nov 22, 2022 (view filing) | Nov 21 | 1 day | Evans Craig EPresident | SSale | −58.2K | $3.56 | −$207.4K | −1.0%5.58M after | 2 lots |
| Oct 20, 2022 (view filing) | Oct 19 | 1 day | Moftakhar AmirChief Financial Officer | SSale | −8.39K | $3.48 | −$29.2K | −1.5%558.9K after | 2 lots |
| Oct 19, 2022 (view filing)9:38 PM ET | Oct 17 | 2 days | Song Julia and 1 otherChief Technology Officer | SSale | −12.6K | $3.72 | −$47.0K | −0.5%2.45M after | |
| Oct 19, 2022 (view filing)9:38 PM ET | Oct 17 | 2 days | Song Julia and 1 otherChief Technology Officer | SSale | −16.3K | $3.72 | −$60.8K | −0.3%5.63M after | |
| Oct 19, 2022 (view filing) | Oct 17 | 2 days | Dresselhuys Eric P.Chief Executive Officer | SSale | −110.1K | $3.72 | −$409.5K | −7.4%1.38M after | 4 lots |
| Oct 19, 2022 (view filing) | Oct 17 | 2 days | Moftakhar AmirChief Financial Officer | SSale | −16.7K | $3.72 | −$62.2K | −2.9%567.2K after | |
| Oct 18, 2022 (view filing) | Oct 17 | 1 day | Moftakhar AmirChief Financial Officer | SSale | −63.2K | $4.03 | −$254.7K | −9.8%584.0K after | |
| Mar 3, 2022 (view filing) | Mar 1 | 2 days | Niggli Michael RDirector | PPurchase | +20.0K | $5.01 | +$100.2K | +3.9%530.2K after | |
| Jan 25, 2022 (view filing)4:10 PM ET | Jan 24 | 1 day | Song Julia and 1 otherChief Technology Officer | SSale | −1.34K | $6.05 | −$8.12K | 0.0%5.37M after | |
| Jan 25, 2022 (view filing) | Jan 24 | 1 day | Dresselhuys Eric P.Chief Executive Officer | SSale | −59.6K | $6.05 | −$360.8K | −6.4%869.2K after |