Delisting risk
ESS Tech
Builds iron-flow systems for long-duration grid and on-site energy storage.
$0.3510
After-hours close+0.00 (+0.72%)
At close$0.3485(−2.90%)
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Breakdown13F · Form 4
Institutions 25.90%7.61M sharesInsiders 3.94%1.16M sharesOther 70.16%20.62M shares
Shares outstanding 29.39M · Float 25.02M · 85.1% free float
Institutions13F, as of Mar 31, 2026
50 holders · 7.61M shares · 11 new positions · 22 increased · 7 reduced · 14 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| SoftBank Group Corp. | 2.40M | 8.16% | 0 | May 15, 2026 |
| Alyeska Investment Group, L.P. | 1.40M | 4.76% | 0 | May 15, 2026 |
| Heights Capital Management, Inc | 963.5K | 3.28% | +963.5Knew | May 15, 2026 |
| Arosa Capital Management LP | 910.0K | 3.10% | −40.0K | May 15, 2026 |
| Vanguard Capital Management LLC | 634.7K | 2.16% | +634.7Knew | May 15, 2026 |
| Geode Capital Management, LLC | 223.6K | 0.76% | +87.1K | May 15, 2026 |
| Shay Capital LLC | 180.0K | 0.61% | 0 | May 15, 2026 |
| UBS Group AG | 149.3K | 0.51% | +104.6K | May 5, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| SB Energy Global Holdings One Ltd. | 20.20% | 2.40M | 13D | Mar 3, 2025 ↗ |
| Ayrton Capital LLC | 9.99% | 3.02M | 13G | May 11, 2026 ↗ |
| Alyeska Investment Group, L.P. | 5.15% | 1.40M | 13G | May 15, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Jigish Dhirajlal Trivedi | officer: COO | 275.0K | 0.94% | Sep 5, 2025 |
| Kelly F. Goodman | officer: SEE REMARKS | 205.2K | 0.70% | Aug 24, 2026 |
| Kate Eileen Suhadolnik | officer: Chief Financial Officer | 156.8K | 0.53% | Aug 24, 2026 |
| Anthony Rabb | officer: Chief Financial Officer | 109.4K | 0.37% | May 22, 2025 |
| Michael R. Niggli | director | 90.8K | 0.31% | Oct 15, 2025 |
| Harry Quarls | director | 68.8K | 0.23% | Jun 2, 2026 |
| Raffi Garabedian | director | 53.2K | 0.18% | Jun 2, 2026 |
| Alexi Wellman | director | 52.4K | 0.18% | Jun 2, 2026 |
| Sandeep Nijhawan | director | 42.6K | 0.14% | Jun 2, 2026 |
| Rich Hossfeld | director | 41.4K | 0.14% | Jun 2, 2026 |
3 ten-percent owners hold 2.74M shares by Form 4, outside the officers-and-directors figure above · 11 people have not refiled in the last 18 months (2.99M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 21, 2026 | Kelly F. Goodmanofficer: SEE REMARKS | Sale | 5,400 | $0.4022 | 205,220 |
| Aug 21, 2026 | Kate Eileen Suhadolnikofficer: Chief Financial Officer | Sale | 3,927 | $0.4022 | 156,830 |
| Jun 4, 2026 | Drew P. Buckleydirector, officer: CEO | Purchase | 25,000 | $1.03 | 25,000 |
| May 22, 2026 | Kelly F. Goodmanofficer: SEE REMARKS | Sale | 2,751 | $0.9346 | 210,620 |
| May 21, 2026 | Kelly F. Goodmanofficer: SEE REMARKS | Sale | 2,482 | $0.9181 | 213,371 |
| May 22, 2026 | Kate Eileen Suhadolnikofficer: Chief Financial Officer | Sale | 1,922 | $0.9346 | 160,757 |
| May 21, 2026 | Kate Eileen Suhadolnikofficer: Chief Financial Officer | Sale | 1,735 | $0.9181 | 162,679 |
| Feb 20, 2026 | Kelly F. Goodmanofficer: SEE REMARKS | Sale | 2,269 | $1.54 | 215,853 |
| Feb 20, 2026 | Kate Eileen Suhadolnikofficer: Chief Financial Officer | Sale | 741 | $1.54 | 164,414 |
CongressHouse and Senate disclosures
Not reported.