ESS Tech, Inc.
ESS Tech, Inc. (GWH) Number of Employees – History & Annual Headcount
Annual SEC headcount, year-over-year change, and per-employee efficiency — chart and full history below.
SEC EDGAR · FMP · GWH · as of Mar 5, 2026
Latest filing snapshot
ESS Tech, Inc. (GWH) employee data is sourced from the annual SEC 10-K filing. As of 2025, full-time employees only. Global consolidated headcount. View SEC filing ↗
GWH Employee Count
2020 – 2025 · Annual · SEC filingSource: SEC annual filings · Hover bar to view year data · Click to view original filing
Employees History
| Filing Date | Employees | Change (1Y) | Growth (1Y) | SEC filing link |
|---|---|---|---|---|
| 2026-03-05 | 62 | -178 | -74.17% | |
| 2025-03-31 | 240 | +9 | +3.90% | |
| 2024-03-14 | 231 | -40 | -14.76% | |
| 2023-03-02 | 271 | +111 | +69.38% | |
| 2022-03-04 | 160 | +158 | +7900.00% | |
| 2021-03-31 | 2 | — | — |
▸ Source: SEC Annual Reports (Form 10-K / 20-F). Employee counts as of fiscal year end. Click the ↗ icon at the end of a row to open the original SEC filing in a new tab.
Related Companies — Employee Count
Electrical Equipment & Parts
About GWH employees
GWH Employees · Headcount
ESS Tech, Inc. (GWH) employee data is sourced from the annual SEC 10-K filing. As of 2025, ESS Tech, Inc. had 62 full-time employees globally. Full-time employees only. Global consolidated headcount.
ESS Tech, Inc. employs 62 full-time employees as of the latest filing within the Electrical Equipment & Parts industry. Revenue per employee stands at $25,532, reflecting the company's operational efficiency.
ESS Tech, Inc.'s workforce decreased by 178 (74.17%) in 2025 compared to the prior fiscal year. The historical trend reflects the company's expansion and contraction cycles.
ESS Tech, Inc.'s revenue per employee of $25,532 positions it among the notable performers in the Electrical Equipment & Parts sector for operational efficiency.
Frequently Asked Questions
GWH Employees · 5 questionsAs of the latest SEC 10-K filing (2025), ESS Tech, Inc. had 62 full-time employees globally. This figure is sourced from the company's mandatory annual disclosure to the SEC.
▸ Data source: FMP /historical-employee-count · SEC EDGAR annual filings · As reported · Global consolidated headcount · As of 2026-03-05