ESS Tech annual free cash flow
2020
2021
2022
2023
2024
2025
ESS Tech Free Cash Flow (FCF) History (GWH)
ESS Tech reported −$53.7M in free cash flow for fiscal 2025, an increase of $25.8M from the previous fiscal year, with a free cash flow margin of −3390.46%.
View full ESS Tech company overviewESS Tech free cash flow by year
| Fiscal year | Period ended | Free cash flow | Change | Growth | FCF margin |
|---|---|---|---|---|---|
| 2025 | 2025-12-31 | −$53.7M | $25.8M | — | −3390.46% |
| 2024 | 2024-12-31 | −$79.5M | −$18.8M | — | −1263.11% |
| 2023 | 2023-12-31 | −$60.7M | $35.1M | — | −804.85% |
| 2022 | 2022-12-31 | −$95.8M | −$41.2M | — | −10715.88% |
| 2021 | 2021-12-31 | −$54.6M | −$37.5M | — | — |
| 2020 | 2020-12-31 | −$17.1M | — | — | — |
ESS Tech quarterly free cash flow
Q1.21
Q2.21
Q3.21
Q4.21
Q1.22
Q2.22
Q3.22
Q4.22
Q1.23
Q2.23
Q3.23
Q4.23
Q1.24
Q2.24
Q3.24
Q4.24
Q1.25
Q2.25
Q3.25
Q4.25
Q1.26
Q2.26
| Fiscal quarter | Period ended | Free cash flow | Change | YoY growth | FCF margin |
|---|---|---|---|---|---|
| Q2 2026 | 2026-06-30 | −$9.4M | $3.6M | — | −12938.36% |
| Q1 2026 | 2026-03-31 | −$14.4M | $4.6M | — | −11241.41% |
| Q4 2025 | 2025-12-31 | −$16.2M | $7.8M | — | — |
| Q3 2025 | 2025-09-30 | −$6.3M | $13.6M | — | −2920.56% |
| Q2 2025 | 2025-06-30 | −$13.1M | $2.7M | — | −555.05% |
| Q1 2025 | 2025-03-31 | −$19.0M | $863,000 | — | −3171.95% |
| Q4 2024 | 2024-12-31 | −$23.9M | −$6.2M | — | −840.25% |
| Q3 2024 | 2024-09-30 | −$19.9M | −$17.9M | — | −5534.82% |
| Q2 2024 | 2024-06-30 | −$15.8M | $4.0M | — | −4549.71% |
| Q1 2024 | 2024-03-31 | −$19.9M | $1.3M | — | −725.46% |
| Q4 2023 | 2023-12-31 | −$17.7M | $10.3M | — | −633.98% |
| Q3 2023 | 2023-09-30 | −$2.0M | $22.8M | — | −128.67% |
| Q2 2023 | 2023-06-30 | −$19.9M | −$271,000 | — | −702.23% |
| Q1 2023 | 2023-03-31 | −$21.1M | $2.3M | — | −5677.42% |
| Q4 2022 | 2022-12-31 | −$28.0M | −$2.0M | — | −174962.50% |
| Q3 2022 | 2022-09-30 | −$24.8M | −$11.4M | — | −12921.88% |
| Q2 2022 | 2022-06-30 | −$19.6M | −$11.0M | — | −2854.37% |
| Q1 2022 | 2022-03-31 | −$23.4M | −$16.8M | — | — |
| Q4 2021 | 2021-12-31 | −$26.0M | — | — | — |
| Q3 2021 | 2021-09-30 | −$13.4M | — | — | — |
| Q2 2021 | 2021-06-30 | −$8.6M | — | — | — |
| Q1 2021 | 2021-03-31 | −$6.6M | — | — | — |
ESS Tech free cash flow growth trends
Over the last five reported fiscal years, free cash flow declined from −$17.1M to −$53.7M, a net decrease of $36.5M. ESS Tech's latest reported quarter, Q2 2026, generated −$9.4M in free cash flow, an increase of $3.6M year over year.
About the metric
What free cash flow means
Free cash flow is the cash a company generates from operations after capital expenditures. Positive FCF can fund dividends, buybacks, debt repayment, or reinvestment; negative FCF means capital spending exceeded operating cash flow for that period.
Calculation and source
How free cash flow is calculated
TickerStat calculates free cash flow as SEC-reported operating cash flow minus capital expenditures. FCF margin equals free cash flow divided by revenue. Fiscal periods can differ from calendar years, so the tables include exact period-end dates.
Review ESS Tech filings at SEC.gov ↗