ESS Tech, Inc. (GWH) Insider Trading
Over the last 3 months, GWH insiders made 1 open-market buy and 2 sales, a net purchase of $22K (SEC Form 4). Over the last 6 months, 12 institutions increased and 7 reduced their position (13F).
Insider Activity
Sentiment
89/100
Buys (3m)
1
Sells (3m)
2
Net (3m)
$21.9K
Insiders buyingFirst buy in 6 quarters
Insider trades by month Buys Sells
Sep
Nov
Feb
May
Jun
Aug
Context3-month price -64.8%Institutions reducing (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 24, 2026 | Suhadolnik Kate Eileenofficer: Chief Financial Officer | Sell | 3,927 | $0.40 |
| Aug 24, 2026 | Goodman Kelly F.officer: SEE REMARKS | Sell | 5,400 | $0.40 |
| Jun 8, 2026 | Buckley Drew Pdirector, officer: CEO | Buy | 25,000 | $1.03 |
| Jun 2, 2026 | Nijhawan Sandeepdirector | Grant | 13,513 | — |
| Jun 2, 2026 | Hossfeld Richdirector | Grant | 13,513 | — |
| Jun 2, 2026 | Garabedian Raffidirector | Grant | 13,513 | — |
| Jun 2, 2026 | WELLMAN ALEXIdirector | Grant | 13,513 | — |
| Jun 2, 2026 | Quarls Harrydirector | Grant | 13,513 | — |
| May 26, 2026 | Goodman Kelly F.officer: SEE REMARKS | Sell | 2,751 | $0.93 |
| May 26, 2026 | Suhadolnik Kate Eileenofficer: Chief Financial Officer | Sell | 1,735 | $0.92 |
| May 26, 2026 | Suhadolnik Kate Eileenofficer: Chief Financial Officer | Sell | 1,922 | $0.93 |
| May 26, 2026 | Goodman Kelly F.officer: SEE REMARKS | Sell | 2,482 | $0.92 |
| Feb 26, 2026 | Suhadolnik Kate Eileenofficer: Chief Financial Officer | Sell | 741 | $1.54 |
| Feb 26, 2026 | Goodman Kelly F.officer: SEE REMARKS | Sell | 2,269 | $1.54 |
| Feb 26, 2026 | Suhadolnik Kate Eileenofficer: Chief Financial Officer | Grant | 137,500 | — |
| Feb 26, 2026 | Goodman Kelly F.officer: SEE REMARKS | Grant | 137,500 | — |
| Jan 29, 2026 | Buckley Drew Pdirector, officer: CEO | Grant | 550,000 | $1.68 |
| Nov 21, 2025 | Suhadolnik Kate Eileenofficer: Interim CFO | Tax | 1,299 | $2.40 |
| Nov 21, 2025 | Goodman Kelly F.officer: Interim CEO | Tax | 4,513 | $2.40 |
| Oct 15, 2025 | Quarls Harrydirector | Grant | 13,513 | — |
| Oct 15, 2025 | Garabedian Raffidirector | Grant | 13,513 | — |
| Oct 15, 2025 | Hossfeld Richdirector | Grant | 13,513 | — |
| Oct 15, 2025 | Teamey Kyledirector | Grant | 13,513 | — |
| Oct 15, 2025 | NIGGLI MICHAEL Rdirector | Grant | 13,513 | — |
| Oct 15, 2025 | WELLMAN ALEXIdirector | Grant | 13,513 | — |
| Oct 15, 2025 | Nijhawan Sandeepdirector | Grant | 13,513 | — |
| Sep 5, 2025 | Trivedi Jigish Dhirajlalofficer: COO | Grant | 275,000 | — |
| Aug 29, 2025 | Suhadolnik Kate Eileenofficer: Interim CFO | Tax | 1,232 | $1.61 |
| Aug 21, 2025 | Goodman Kelly F.officer: Interim CEO | Tax | 4,326 | $1.61 |
| May 22, 2025 | Rabb Anthonyofficer: Chief Financial Officer | Tax | 2,741 | $1.96 |
Source: GWH SEC Form 4 filings, latest Aug 24, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their GWH positions over the last 6 months (SEC Form 13F).
Increased
12
New positions
11
Reduced
7
Sold out
49
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| SOFTBANK GROUP CORP. | Unchanged | 2.4M | May 15, 2026 |
| ALYESKA INVESTMENT GROUP, L.P. | Unchanged | 1.4M | May 15, 2026 |
| HEIGHTS CAPITAL MANAGEMENT, INC | New Position | 963K | May 15, 2026 |
| AROSA CAPITAL MANAGEMENT LP | Reduced | 910K | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 635K | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 224K | May 15, 2026 |
| SHAY CAPITAL LLC | Unchanged | 180K | May 15, 2026 |
| UBS GROUP AG | Increased | 149K | May 5, 2026 |
| GSA CAPITAL PARTNERS LLP | Increased | 146K | May 8, 2026 |
| GREEN ALPHA ADVISORS, LLC | Reduced | 115K | Apr 7, 2026 |
| PATHSTONE HOLDINGS, LLC | Reduced | 87K | May 11, 2026 |
| VANGUARD FIDUCIARY TRUST CO | New Position | 69K | May 8, 2026 |
| FMR LLC | Increased | 52K | May 15, 2026 |
| BLACKROCK, INC. | Unchanged | 50K | May 13, 2026 |
| STATE STREET CORP | Unchanged | 47K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.