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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: $1.41 Daily Weekly Monthly 20 Day Moving Average: 144,554 shares Shares Outstanding: 14.19 (millions) Market Capitalization: $20.01 (millions) Beta: 1.22 52 Week High: $10.12 52 Week Low: $0.76 Short Interest Ratio:   % Price Change % Price Change Relative to S&P 500 4 Week -17.54% -18.99% 12 Week 42.42% 29.37% Year To Date -76.02% -78.29%

• 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: 06/01/25 Next Expected EPS Date: 11/12/25 Share - Related Items Shares Outstanding: 14.19 Most Recent Split Date: 8.00 (0.07:1) Beta: 1.22 Market Capitalization: $20.01 (millions)

• EPS Information     • Dividend Information Analyst Coverage: No Dividend Yield: 0.00% Current Fiscal Quarter EPS Consensus Estimate: $-0.74 Indicated Annual Dividend: $0.00 Current Fiscal Year EPS Consensus Estimate: $-3.57 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: 11/12/25

• Fundamental Ratios P/E Current FY Estimate: - Trailing 12 Months: - PEG Ratio: - Price Ratios Price/Book: 5.50 Price/Cash Flow: - Price / Sales: 3.24 EPS Growth vs. Year Ago Period: 49.97% vs. Previous Quarter: 40.00% Sales Growth vs. Year Ago Period: 577.59% vs. Previous Quarter: 293.66% ROE 06/30/25 - -321.20 03/31/25 - -215.91 12/31/24 - -146.79 ROA 06/30/25 - -114.71 03/31/25 - -103.16 12/31/24 - -85.52 Current Ratio 06/30/25 - 0.47 03/31/25 - 1.07 12/31/24 - 1.57 Quick Ratio 06/30/25 - 0.27 03/31/25 - 0.76 12/31/24 - 1.37 Operating Margin 06/30/25 - -1,217.22 03/31/25 - -2,067.81 12/31/24 - -1,369.69 Net Margin 06/30/25 - -1,217.22 03/31/25 - -2,067.81 12/31/24 - -1,369.69 Pre-Tax Margin 06/30/25 - -1,217.22 03/31/25 - -2,067.81 12/31/24 - -1,369.69 Book Value 06/30/25 - 0.26 03/31/25 - 1.00 12/31/24 - 2.41 Inventory Turnover 06/30/25 - 7.42 03/31/25 - 8.22 12/31/24 - 10.20 Debt-to-Equity 06/30/25 - 0.00 03/31/25 - 0.00 12/31/24 - 0.00 Debt-to-Capital 06/30/25 - 0.00 03/31/25 - 0.00 12/31/24 - 0.00

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