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Zacks Company Profile for ESS Tech, Inc. (GWH : NYSE)

• Company Description    ESS Inc. designs, builds and deploys iron flow batteries for long-duration commercial and utility-scale energy storage applications. ESS Inc., formerly known as ACON S2 Acquisition Corp., is based in WILSONVILLE, Ore. Number of Employees: 240

• Price / Volume Information    Yesterday's Closing Price: $2.03 Daily Weekly Monthly 20 Day Moving Average: 426,901 shares Shares Outstanding: 19.62 (millions) Market Capitalization: $39.82 (millions) Beta: 1.43 52 Week High: $13.87 52 Week Low: $0.76 Short Interest Ratio:   % Price Change % Price Change Relative to S&P 500 4 Week -21.32% -22.96% 12 Week 33.55% 29.27% Year To Date -65.48% -70.61%

• Address & Contact Information Street Address Phone / Fax Email Address Web URL 26440 SW Parkway Ave. Bldg. 83 - Wilsonville,OR 97070 USA ph: 855-423-9920 fax: - investors@essinc.com http://www.essinc.com

• General Corporate Information    Officers Kelly F. Goodman - Chief Executive Officer Harry Quarls - Chairman of the Board and Director Michael Niggli - Chairman and Director Anthony Rabb - Chief Financial Officer Raffi Garabedian - Director Peer Information ESS Tech, Inc. (REFR) ESS Tech, Inc. (BELFA) ESS Tech, Inc. (DIPC) ESS Tech, Inc. (V.SSC) ESS Tech, Inc. (BNSOF) ESS Tech, Inc. (CUB.) Industry / Sector / Ticker Info Analyst Coverage: No Industry Group: ELEC PRODS-MISC Sector: Computer and Technology CUSIP: 26916J205 SIC: 3690 Fiscal Year Fiscal Year End: December Last Reported Quarter: 09/01/25 Next Expected EPS Date: 03/30/26 Share - Related Items Shares Outstanding: 19.62 Most Recent Split Date: 8.00 (0.07:1) Beta: 1.43 Market Capitalization: $39.82 (millions)

• EPS Information     • Dividend Information Analyst Coverage: No Dividend Yield: 0.00% Current Fiscal Quarter EPS Consensus Estimate: $-0.56 Indicated Annual Dividend: $0.00 Current Fiscal Year EPS Consensus Estimate: $-3.69 Payout Ratio: Number of Estimates in the Fiscal Year Consensus: 1.00 Change In Payout Ratio: Estmated Long-Term EPS Growth Rate: % Last Dividend Paid: NA - $0.00 Next EPS Report Date: 03/30/26

• Fundamental Ratios P/E Current FY Estimate: - Trailing 12 Months: - PEG Ratio: - Price Ratios Price/Book: - Price/Cash Flow: - Price / Sales: 6.61 EPS Growth vs. Year Ago Period: 61.58% vs. Previous Quarter: 18.89% Sales Growth vs. Year Ago Period: -40.39% vs. Previous Quarter: -90.92% ROE 09/30/25 - -592.34 06/30/25 - -321.20 03/31/25 - -215.91 ROA 09/30/25 - -125.15 06/30/25 - -114.71 03/31/25 - -103.16 Current Ratio 09/30/25 - 0.49 06/30/25 - 0.47 03/31/25 - 1.07 Quick Ratio 09/30/25 - 0.29 06/30/25 - 0.27 03/31/25 - 0.76 Operating Margin 09/30/25 - -1,045.28 06/30/25 - -1,217.22 03/31/25 - -2,067.81 Net Margin 09/30/25 - -1,045.28 06/30/25 - -1,217.22 03/31/25 - -2,067.81 Pre-Tax Margin 09/30/25 - -1,045.28 06/30/25 - -1,217.22 03/31/25 - -2,067.81 Book Value 09/30/25 - -0.11 06/30/25 - 0.26 03/31/25 - 1.00 Inventory Turnover 09/30/25 - 6.81 06/30/25 - 7.42 03/31/25 - 8.22 Debt-to-Equity 09/30/25 - - 06/30/25 - 0.00 03/31/25 - 0.00 Debt-to-Capital 09/30/25 - - 06/30/25 - 0.00 03/31/25 - 0.00

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