ESS Tech, Inc.
Total Trades
28
Buys
15
Sells
13
Largest Trade
$100K–$500K
Insiders
9
Institutional Funds
39
Inst. Value
$1M+
Activist Filings
14
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Suhadolnik Kate Eileen | CFO | SELL | $1K–$15K | 741 | $1.54 | Feb 27, 2026 |
| Goodman Kelly F. | SEE REMARKS | SELL | $1K–$15K | 2K | $1.54 | Feb 27, 2026 |
| Dresselhuys Eric P. | CEO | BUY | $1K–$15K | 1K | $5.23 | Nov 19, 2024 |
| Teamey Kyle | Director | BUY | <$1K | 142 | $6.73 | Sep 3, 2024 |
| Quarls Harry | Director | BUY | $1K–$15K | 5K | $1.25 | Nov 16, 2023 |
| Quarls Harry | Director | BUY | $50K–$100K | 67K | $1.35 | Nov 16, 2023 |
| Quarls Harry | Director | BUY | $100K–$500K | 81K | $1.27 | Nov 14, 2023 |
| Quarls Harry | Director | BUY | $50K–$100K | 47K | $1.10 | Nov 13, 2023 |
| Teamey Kyle | Director | BUY | $1K–$15K | 1K | $1.11 | Nov 13, 2023 |
| NIGGLI MICHAEL R | Director | BUY | $1K–$15K | 10K | $0.81 | May 17, 2023 |
| Hossfeld Rich | Director | BUY | $1K–$15K | 10K | $0.81 | May 16, 2023 |
| Teamey Kyle | Director | BUY | $1K–$15K | 4K | $0.84 | May 16, 2023 |
| NIGGLI MICHAEL R | Director | BUY | $15K–$50K | 20K | $1.13 | May 16, 2023 |
| NIGGLI MICHAEL R | Director | BUY | $1K–$15K | 5K | $1.65 | Mar 7, 2023 |
| Teamey Kyle | Director | BUY | $1K–$15K | 3K | $1.60 | Mar 7, 2023 |
| Dresselhuys Eric P. | CEO | SELL | $15K–$50K | 23K | $2.04 | Feb 23, 2023 |
| Evans Craig E | President | SELL | $1K–$15K | 10K | $1.08 | Feb 23, 2023 |
| NIGGLI MICHAEL R | Director | BUY | $15K–$50K | 19K | $2.56 | Dec 16, 2022 |
| Dresselhuys Eric P. | CEO | SELL | $50K–$100K | 14K | $3.82 | Nov 22, 2022 |
| Evans Craig E | President | SELL | $100K–$500K | 115K | $3.74 | Nov 22, 2022 |
| Moftakhar Amir | CFO | SELL | $15K–$50K | 8K | $3.48 | Oct 21, 2022 |
| Evans Craig E | President | SELL | $100K–$500K | 29K | $3.72 | Oct 20, 2022 |
| Dresselhuys Eric P. | CEO | SELL | $100K–$500K | 110K | $3.72 | Oct 20, 2022 |
| Moftakhar Amir | CFO | SELL | $50K–$100K | 17K | $3.72 | Oct 20, 2022 |
| Moftakhar Amir | CFO | SELL | $100K–$500K | 63K | $4.03 | Oct 18, 2022 |
| NIGGLI MICHAEL R | Director | BUY | $100K–$500K | 20K | $5.01 | Mar 4, 2022 |
| Evans Craig E | President | SELL | $1K–$15K | 1K | $6.05 | Jan 25, 2022 |
| Dresselhuys Eric P. | CEO | SELL | $100K–$500K | 60K | $6.05 | Jan 25, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 39 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| Alyeska Investment Group, L.P. | 1.4M | $1M+ | SH |
| VANGUARD GROUP INC | 408K | $500K+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 121K | $100K–$500K | SH |
| Green Alpha Advisors, LLC | 119K | $100K–$500K | SH |
| JANE STREET GROUP, LLC | 109K | $100K–$500K | SH |
| Pathstone Holdings, LLC | 89K | $100K–$500K | SH |
| GSA CAPITAL PARTNERS LLP | 75K | $100K–$500K | SH |
| JPMORGAN CHASE & CO | 74K | $100K–$500K | SH |
| BlackRock, Inc. | 50K | $50K–$100K | SH |
| STATE STREET CORP | 47K | $50K–$100K | SH |
| UBS Group AG | 41K | $50K–$100K | SH |
| LPL Financial LLC | 14K | $15K–$50K | SH |
| PRIMORIS WEALTH ADVISORS, LLC | 10K | $15K–$50K | SH |
| Golden State Wealth Management, LLC | 3K | $1K–$15K | SH |
| CWM, LLC | 3K | $1K–$15K | SH |
| PNC FINANCIAL SERVICES GROUP, INC. | 2K | $1K–$15K | SH |
| MORGAN STANLEY | 2K | $1K–$15K | SH |
| Missouri Trust & Investment Co | 633 | $1K–$15K | SH |
| SBI Securities Co., Ltd. | 571 | $1K–$15K | SH |
| GROUP ONE TRADING LLC | 409 | <$1K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
Alyeska Investment Group, L.P.
SC 13G · Feb 17, 2026
7.1%
1.4M shares
SB Energy Global Holdings One Ltd.
SC 13D/A · Mar 3, 2025
20.2%
2.4M shares
SC 13D/A · Nov 1, 2024
2.8%
335K shares
SC 13G/A · Feb 14, 2024
5.3%
9.2M shares
Pangaea Ventures Fund III, L.P.
SC 13G/A · Jan 31, 2024
6.1%
10.5M shares
SC 13G · Sep 25, 2023
18.0%
34.2M shares
SC 13D · Jul 13, 2023
5.5%
8.5M shares
SC 13G · Mar 29, 2023
6.3%
9.7M shares
SC 13G/A · Feb 13, 2023
4.5%
7.1M shares
SC 13G/A · Jan 30, 2023
7.4%
11.3M shares
SC 13G/A · Feb 14, 2022
6.8%
10.2M shares
/S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON WEISS ASSET MANAGEMENT LP
SC 13G/A · Feb 11, 2022
0.0%
0 shares
SC 13G/A · Feb 11, 2022
6.4%
9.2M shares
SC 13G/A · Jan 28, 2022
8.7%
12.5M shares