ESS Tech, Inc.
GWH- Exchange
- NYSE
- Industry
- Miscellaneous Electrical Machinery, Equipment & Supplies
- SEC CIK
- 0001819438
In the last 90 days, ESS Tech, Inc. insiders filed 0 open-market purchases and 2 sales; 47 institutions reported holding it in 13F filings for Q2 2026, worth $6.94M in total; no superinvestor holds it.
Other share classesGWHWW
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $3.75K in total
- 2
- 13F holdersQ2 2026, −3 vs. previous quarter
- 47
- 13F valueReported value at the end of Q2 2026
- $6.94M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding GWH, Q2 2026
No superinvestor reported holding GWH at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by ESS Tech, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 24, 2026 (view filing)4:10 PM ET | Aug 21 | 3 days | Suhadolnik Kate EileenChief Financial Officer | SSale | −3.93K | $0.4022 | −$1.58K | −2.4%156.8K after | |
| Aug 24, 2026 (view filing)4:08 PM ET | Aug 21 | 3 days | Goodman Kelly F.SEE REMARKS | SSale | −5.40K | $0.4022 | −$2.17K | −2.6%205.2K after | |
| Jun 8, 2026 (view filing) | Jun 4 | 4 days | Buckley Drew PCEO | PPurchase | +25.0K | $1.03 | +$25.8K | New position25.0K after | |
| May 26, 2026 (view filing) | May 21-22 | 5 days | Suhadolnik Kate EileenChief Financial Officer | SSale | −3.66K | $0.9253 | −$3.38K | −2.2%160.8K after | 2 lots |
| May 26, 2026 (view filing) | May 21-22 | 5 days | Goodman Kelly F.SEE REMARKS | SSale | −5.23K | $0.9253 | −$4.84K | −2.4%210.6K after | 2 lots |
| Feb 26, 2026 (view filing) | Feb 20 | 6 daysLate | Suhadolnik Kate EileenChief Financial Officer | SSale | −741 | $1.54 | −$1.14K | −0.4%164.4K after | |
| Feb 26, 2026 (view filing) | Feb 20 | 6 daysLate | Goodman Kelly F.SEE REMARKS | SSale | −2.27K | $1.54 | −$3.49K | −1.0%215.9K after | |
| Nov 18, 2024 (view filing) | Nov 18 | Same day | Dresselhuys Eric P.Chief Executive Officer | PPurchase | +1.00K | $5.23 | +$5.23K | +0.6%180.6K after | |
| Sep 17, 2024 (view filing) | Sep 11 | 6 daysLate | Nijhawan SandeepDirector | SSale | −7.00K | $5.72 | −$40.0K | −31.1%15.5K after | |
| Sep 3, 2024 (view filing) | Aug 30 | 4 days | Teamey KyleDirector | PPurchase | +142 | $6.73 | +$955.66 | +0.6%25.2K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in ESS Tech, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Softbank Group Corp | 2,396,980 | $2.28M | 0.01% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 1,400,000 | $1.33M | 0.00% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 638,920 | $607.0K | 0.00% | +4,200+0.7% | Added |
| UBS Group AG | 602,607 | $572.5K | 0.00% | +453,328+303.7% | Added |
| Arosa Capital Management LP | 550,000 | $522.5K | 0.46% | −360,000−39.6% | Reduced |
| Heights Capital Management, Inc | 548,621 | $521.2K | 0.12% | −414,874−43.1% | Reduced |
| Shay Capital LLC | 210,146 | $199.6K | 0.02% | +30,146+16.7% | Added |
| Geode Capital Management, LLC | 210,037 | $199.5K | 0.00% | −13,524−6.0% | Reduced |
| BlackRock, Inc. | 133,867 | $127.2K | 0.00% | +83,497+165.8% | Added |
| Vanguard Fiduciary Trust Co | 129,877 | $123.4K | 0.00% | +60,475+87.1% | Added |