ESS Tech (GWH)
Builds iron-flow systems for long-duration grid and on-site energy storage.
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Builds iron-flow energy-storage systems for utility grids, data centers, microgrids, and defense sites, generating revenue from delivered systems and related services. Its Energy Base pivot centers on long-duration storage using iron, salt, and water, while manufacturing remains concentrated in Oregon.
Manufactures iron-flow battery systems for long-duration stationary energy storage. Energy Base, the flagship system, serves utility grids, hyperscale data centers, industrial microgrids, and defense installations; Energy Warehouse and Energy Center are legacy lines. Its iron, salt, and water chemistry is designed to be non-flammable, support long discharge durations and repeated cycling, and separate power hardware from energy capacity.
Builds in Wilsonville, Oregon, with its near-term pipeline centered on U.S. utility, data-center, microgrid, and defense deployments; earlier commercial activity reached Australia and Europe. Revenue has historically followed delivery and customer acceptance, supplemented by engineering, warranty, component, and licensing work. Current execution depends on manufacturing, site readiness, financing, permitting, interconnection, third-party equipment, and field validation; all production is concentrated in Wilsonville.
Company facts
Target rangeAs of Sep 22, 2026
Latest analyst notes
| Date | Firm | Action | Prior | Current |
|---|---|---|---|---|
| May 18, 2026 | Roth Capital | Target | Target: $3.50 | Target: $2 |
| Oct 10, 2025 | Roth Capital | Target | Target: $2.50 | Target: $3.50 |
| Mar 4, 2025 | Roth MKM | Downgrade | ||
| Nov 14, 2024 | Oppenheimer | Downgrade |
EPSReportedEstimate
RevenueReportedEstimate
Balance sheet, Jun 30, 2026Cash & short-term investments $10.8M · Total debt $3.0M · Total assets $32.5M · Shareholders' equity −$2.7M
- Revenue
- $69.0K
- Operating income
- −$15.1M
- Net income
- −$15.6M
No dividends on record.
| Institutions | 24.84% | 7.30M shares | |
|---|---|---|---|
| 46 holders · as of Jun 30, 2026 | |||
| Insiders | 6.51% | 1.91M shares | |
| 14 holders · as of Aug 24, 2026 | |||
| Other | 68.65% | 20.17M shares | |
| remainder | |||
29.39M company shares as of Sep 4, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
Two share counts disagree (32.97M in the company's Sep 22, 2026 report, 29.39M elsewhere); stakes use the report.
Top shareholders13F · 13D/G · Form 4
| Holder | Stake | Shares | Date |
|---|---|---|---|
Ayrton Capital LLCInstitution | 10.27% | 3.02M | filed May 11, 2026 |
SoftBank Group CorpInstitution | 8.16% | 2.40M | as of Jun 30, 2026 |
Alyeska Investment Group, L.P.Institution | 4.76% | 1.40M | as of Jun 30, 2026 |
Vanguard Capital Management LLCInstitution | 2.17% | 638,920 | as of Jun 30, 2026 |
UBS Group AGInstitution | 2.05% | 602,607 | as of Jun 30, 2026 |
Insider tradesForm 4
| Date | Insider | Role | Shares | Avg price |
|---|---|---|---|---|
| Aug 21, 2026 | Kelly F. Goodman | officer: SEE REMARKS | −5,400 | $0.4022 |
| Aug 21, 2026 | Kate Eileen Suhadolnik | officer: Chief Financial Officer | −3,927 | $0.4022 |
| Jun 4, 2026 | Drew P. Buckley | director, officer: CEO | +25,000 | $1.03 |
| May 22, 2026 | Kelly F. Goodman | officer: SEE REMARKS | −2,751 | $0.9346 |
| May 21, 2026 | Kelly F. Goodman | officer: SEE REMARKS | −2,482 | $0.9181 |
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CompareAfter hours
| Company | Price | Change | |||||
|---|---|---|---|---|---|---|---|
| ESS Tech | $0.3933 | −0.05% | $10.9M | — | — | — | −96.9% |
| Tesla | $378.40 | −0.13% | $1.48T | 347.5 | 183.8 | 14.3 | +25.5% |
| Fluence Energy | $7.53 | +3.69% | $1.36B | — | — | 0.5 | +7.9% |
| Eos Energy Enterprises | $4.07 | +0.12% | $1.18B | — | — | 5.5 | +351.4% |
| Energy Vault | $4.76 | 0.00% | $851.8M | — | — | 3.8 | +104.1% |
| Stem | $4.05 | −0.04% | $39.1M | — | — | 0.3 | −12.2% |
| Median | 347.5 | 183.8 | 3.8 | +25.5% |