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10-K

Annual Report

ESS Tech, Inc. GWH GWH-WT

0001819438-26-000012

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Filed
Mar 5, 2026 12:00 AM ET
Period of report

On SEC.gov

Financials in this filing

Metric Period Value
Shares Outstanding FY 2025 · Feb 27, 2026 27.17M sh
Shares Diluted FY 2025 · Dec 31, 2025 14.6M sh
Shares Diluted FY 2025 · Dec 31, 2024 11.77M sh
Capex FY 2025 · Dec 31, 2025 $3.39M
Capex FY 2025 · Dec 31, 2024 $7.29M
Operating Cash Flow FY 2025 · Dec 31, 2025 −$50.28M
Operating Cash Flow FY 2025 · Dec 31, 2024 −$72.22M
Cash And Equivalents FY 2025 · Dec 31, 2025 $14.48M
Cash And Equivalents FY 2025 · Dec 31, 2024 $13.34M
Stockholders Equity FY 2025 · Dec 31, 2025 $8.62M
Stockholders Equity FY 2025 · Dec 31, 2024 $28.88M
Stockholders Equity FY 2025 · Dec 31, 2023 $103.36M
Current Liabilities FY 2025 · Dec 31, 2025 $25.29M
Current Liabilities FY 2025 · Dec 31, 2024 $27.6M
Total Liabilities FY 2025 · Dec 31, 2025 $42.55M
Total Liabilities FY 2025 · Dec 31, 2024 $42.93M
Current Assets FY 2025 · Dec 31, 2025 $26.25M
Current Assets FY 2025 · Dec 31, 2024 $43.36M
Total Assets FY 2025 · Dec 31, 2025 $51.17M
Total Assets FY 2025 · Dec 31, 2024 $71.81M
Eps Diluted FY 2025 · Dec 31, 2025 −$4.34
Eps Diluted FY 2025 · Dec 31, 2024 −$7.32
Eps Basic FY 2025 · Dec 31, 2025 −$4.34
Eps Basic FY 2025 · Dec 31, 2024 −$7.32
Sga Expense FY 2025 · Dec 31, 2025 $17.6M
Sga Expense FY 2025 · Dec 31, 2024 $23.51M
Rd Expense FY 2025 · Dec 31, 2025 $8.3M
Rd Expense FY 2025 · Dec 31, 2024 $11.77M
Net Income FY 2025 · Dec 31, 2025 −$63.44M
Net Income FY 2025 · Dec 31, 2024 −$86.22M
Operating Income FY 2025 · Dec 31, 2025 −$57.41M
Operating Income FY 2025 · Dec 31, 2024 −$89.8M
Gross Profit FY 2025 · Dec 31, 2025 −$27.67M
Gross Profit FY 2025 · Dec 31, 2024 −$45.36M
Cost Of Revenue FY 2025 · Dec 31, 2025 $29.26M
Cost Of Revenue FY 2025 · Dec 31, 2024 $51.65M
Revenue FY 2025 · Dec 31, 2025 $1.58M
Revenue FY 2025 · Dec 31, 2024 $6.3M