ESS Tech, Inc.
Cash Flow Statement
| Line Item | Jun 2026 | Mar 2026 | Dec 2025 | Sep 2025 | Jun 2025 | Mar 2025 | Dec 2024 | Sep 2024 |
|---|---|---|---|---|---|---|---|---|
| Operating Activities | ||||||||
| Net Income | $-15.6M | $-15.9M | $-24.0M | $-10.4M | $-11.1M | $-18.0M | $-23.5M | $-22.5M |
| Depreciation & Amortization | $698.0K | $2.4M | $1.2M | $1.5M | $1.5M | $1.5M | $1.4M | $781.0K |
| Depreciation | $5.0M | $2.3M | $1.0M | $1.4M | $1.5M | $1.5M | $1.4M | $700.0K |
| Amortization | $67.0K | $67.0K | $32.0K | $67.0K | $134.0K | $67.0K | $-101.0K | $200.0K |
| Stock-Based Compensation | $681.0K | $1.1M | $1.5M | $1.2M | $1.5M | $1.2M | $3.0M | $2.7M |
| Net Cash from Operating Activities | $-8.9M | $-13.5M | $-13.9M | $-5.8M | $-12.4M | $-18.2M | $-20.5M | $-17.6M |
| Investing Activities | ||||||||
| Capital Expenditures | $502.0K | $930.0K | $2.3M | $-417.0K | $729.0K | $762.0K | $3.5M | $2.3M |
| Business Acquisitions | — | — | — | — | — | — | — | — |
| Net Cash from Investing Activities | $5.5M | $725.0K | $-9.8M | $417.0K | $3.7M | $13.3M | $20.9M | $-6.3M |
| Financing Activities | ||||||||
| Dividends Paid | — | — | — | — | — | — | — | — |
| Stock Repurchases | — | — | — | — | — | — | — | — |
| Net Cash from Financing Activities | $-1.2M | $14.0M | $34.6M | $8.1M | $816.0K | $-13.0K | $125.0K | $-8.0K |
| Net Change in Cash | $-4.6M | $1.3M | $10.9M | $2.6M | $-7.9M | $-5.0M | $520.0K | $-23.9M |
| Free Cash Flow | $-9.4M | $-14.4M | $-16.2M | $-5.4M | $-13.1M | $-19.0M | $-23.9M | $-19.9M |