ESS Tech, Inc. (GWH)
ESS Tech, Inc. brought in -$1.2M of revenue over the twelve months to June 30, 2026, down 119.0% from a year earlier. It posted a net loss of $65.8M. In fiscal 2025 capital spending exceeded operating cash flow by $53.7M. At June 30, 2026 it held $10.8M in cash. Its latest periodic report to the SEC is the quarterly report (10-Q) filed on August 11, 2026.
Watch GWH in 60 secondsWhat ESS Tech, Inc. does
ESS Tech, Inc. is registered with the SEC under industry code SIC 3690 (Miscellaneous Electrical Machinery, Equipment & Supplies). Its shares trade on NYSE under the ticker GWH.
Revenue and profit by year
Key figures
| Fiscal year | Revenue | Net income | Diluted EPS | Free cash flow |
|---|---|---|---|---|
| 2025 | $1.6M | -$63.4M | -$4.34 | -$53.7M |
| 2024 | $6.3M | -$86.2M | -$7.32 | -$79.5M |
| 2023 | $7.5M | -$77.6M | -$7.27 | -$60.7M |
| 2022 | $894K | -$78M | -$7.72 | -$95.8M |
| 2021 | $0 | -$477.1M | -$86.79 | -$54.6M |
| 2020 | $0 | -$30.4M | -$7.88 | -$17.1M |
Full financial statements: income, balance sheet and cash flow
Where GWH ranks in Other
Latest SEC filings
What ESS Tech, Inc. has filed recently, newest first. Each links to the original document on SEC EDGAR.
- September 24, 2026Proxy statement DEF 14A
- September 16, 2026
- September 15, 2026Preliminary proxy statement PRE 14A
- September 8, 2026
- September 3, 2026
- August 21, 2026
- August 21, 2026
- August 14, 2026Passive stake changed SCHEDULE 13G/A
- August 13, 2026Passive stake changed SCHEDULE 13G/A
- August 11, 2026Quarterly report 10-Q · period to June 30, 2026Revenue fell 97% to $73K versus the same quarter last year; diluted EPS -$0.46 versus -$0.90.
Insider trades
What the people running ESS Tech, Inc. did with its shares, from the Form 4 filings they must send the SEC within two business days.
Insiders sold $3.8K worth of shares in the last 90 days and bought none on the open market.
| Date | Insider | What | Shares | Value |
|---|---|---|---|---|
| August 21, 2026 | Goodman Kelly F.SEE REMARKS | Sold | 5,400 | $2.2K |
| August 21, 2026 | Suhadolnik Kate EileenChief Financial Officer | Sold | 3,927 | $1.6K |
| June 4, 2026 | Buckley Drew PCEO, Director | Bought | 25,000 | $25.7K |
| May 29, 2026 | Nijhawan SandeepDirector | Received as pay | 13,513 | - |
| May 29, 2026 | Garabedian RaffiDirector | Received as pay | 13,513 | - |
| May 29, 2026 | Quarls HarryDirector | Received as pay | 13,513 | - |
| May 29, 2026 | Wellman AlexiDirector | Received as pay | 13,513 | - |
| May 29, 2026 | Hossfeld RichDirector | Received as pay | 13,513 | - |
| May 22, 2026 | Goodman Kelly F.SEE REMARKS | Sold | 2,751 | $2.6K |
| May 22, 2026 | Suhadolnik Kate EileenChief Financial Officer | Sold | 1,922 | $1.8K |
| May 21, 2026 | Goodman Kelly F.SEE REMARKS | Sold | 2,482 | $2.3K |
| May 21, 2026 | Suhadolnik Kate EileenChief Financial Officer | Sold | 1,735 | $1.6K |
Who owns GWH
Three views from three kinds of SEC filings, each with its own date. They overlap and are not added up.
5% holders
| Holder | Of class | Filed |
|---|---|---|
| SB Energy Global Holdings One Ltd.13D, may seek influence with 3 related filers | 20.2% | March 3, 2025 |
| Ayrton Capital LLC13G, passive with 2 related filers | 8.14% | August 13, 2026 |
Largest institutional holders
Insiders
8 insiders reported holding 645,338 shares in total, about $113.6K at the last price.
| Holder | Shares |
|---|---|
| Goodman Kelly F.SEE REMARKS | 205,220 |
| Suhadolnik Kate EileenChief Financial Officer | 156,830 |
| Quarls HarryDirector | 68,769 |
| Garabedian RaffiDirector | 53,185 |
| Wellman AlexiDirector | 52,399 |
| Nijhawan SandeepDirector | 42,563 |
| Hossfeld RichDirector | 41,372 |
| Buckley Drew PCEO, Director | 25,000 |
Questions about GWH
What does ESS Tech, Inc. do?
ESS Tech, Inc. is registered with the SEC under industry code SIC 3690 (Miscellaneous Electrical Machinery, Equipment & Supplies). Its shares trade on NYSE under the ticker GWH.
Is ESS Tech, Inc. profitable?
No. Over the twelve months to June 30, 2026 it reported a net loss of $65.8M.
How much revenue does ESS Tech, Inc. make?
Over the twelve months to June 30, 2026 ESS Tech, Inc. reported revenue of -$1.2M. That is 119.0% less than a year earlier.
When did ESS Tech, Inc. last report?
Its most recent periodic report is the quarterly report (10-Q) filed on August 11, 2026. It covers the period to June 30, 2026. Its newest filing of any kind is the proxy statement from September 24, 2026.
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Follow GWH: get an email when it filesWhere the numbers come from
Financial figures are the values ESS Tech, Inc. tagged in its own SEC filings (XBRL), taken from the latest filing for each period, so restatements replace older figures. Revenue, profit and cash flow are for full fiscal years unless marked as the last twelve months, which is the sum of the four most recent quarters. Where a company reports only the full year, the fourth quarter is the year minus the first three.
Prices are delayed end-of-day market data in the listing currency, and market cap moves with the price. P/E is shown only when earnings per share are positive. Nothing here is investment advice.