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)
DateInsiderTypeSharesPrice
Aug 24, 2026Suhadolnik Kate Eileenofficer: Chief Financial OfficerSell3,927$0.40
Aug 24, 2026Goodman Kelly F.officer: SEE REMARKSSell5,400$0.40
Jun 8, 2026Buckley Drew Pdirector, officer: CEOBuy25,000$1.03
Jun 2, 2026Nijhawan SandeepdirectorGrant13,513
Jun 2, 2026Hossfeld RichdirectorGrant13,513
Jun 2, 2026Garabedian RaffidirectorGrant13,513
Jun 2, 2026WELLMAN ALEXIdirectorGrant13,513
Jun 2, 2026Quarls HarrydirectorGrant13,513
May 26, 2026Goodman Kelly F.officer: SEE REMARKSSell2,751$0.93
May 26, 2026Suhadolnik Kate Eileenofficer: Chief Financial OfficerSell1,735$0.92
May 26, 2026Suhadolnik Kate Eileenofficer: Chief Financial OfficerSell1,922$0.93
May 26, 2026Goodman Kelly F.officer: SEE REMARKSSell2,482$0.92
Feb 26, 2026Suhadolnik Kate Eileenofficer: Chief Financial OfficerSell741$1.54
Feb 26, 2026Goodman Kelly F.officer: SEE REMARKSSell2,269$1.54
Feb 26, 2026Suhadolnik Kate Eileenofficer: Chief Financial OfficerGrant137,500
Feb 26, 2026Goodman Kelly F.officer: SEE REMARKSGrant137,500
Jan 29, 2026Buckley Drew Pdirector, officer: CEOGrant550,000$1.68
Nov 21, 2025Suhadolnik Kate Eileenofficer: Interim CFOTax1,299$2.40
Nov 21, 2025Goodman Kelly F.officer: Interim CEOTax4,513$2.40
Oct 15, 2025Quarls HarrydirectorGrant13,513
Oct 15, 2025Garabedian RaffidirectorGrant13,513
Oct 15, 2025Hossfeld RichdirectorGrant13,513
Oct 15, 2025Teamey KyledirectorGrant13,513
Oct 15, 2025NIGGLI MICHAEL RdirectorGrant13,513
Oct 15, 2025WELLMAN ALEXIdirectorGrant13,513
Oct 15, 2025Nijhawan SandeepdirectorGrant13,513
Sep 5, 2025Trivedi Jigish Dhirajlalofficer: COOGrant275,000
Aug 29, 2025Suhadolnik Kate Eileenofficer: Interim CFOTax1,232$1.61
Aug 21, 2025Goodman Kelly F.officer: Interim CEOTax4,326$1.61
May 22, 2025Rabb Anthonyofficer: Chief Financial OfficerTax2,741$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
InstitutionActionSharesFiled
SOFTBANK GROUP CORP.Unchanged2.4MMay 15, 2026
ALYESKA INVESTMENT GROUP, L.P.Unchanged1.4MMay 15, 2026
HEIGHTS CAPITAL MANAGEMENT, INCNew Position963KMay 15, 2026
AROSA CAPITAL MANAGEMENT LPReduced910KMay 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position635KMay 15, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased224KMay 15, 2026
SHAY CAPITAL LLCUnchanged180KMay 15, 2026
UBS GROUP AGIncreased149KMay 5, 2026
GSA CAPITAL PARTNERS LLPIncreased146KMay 8, 2026
GREEN ALPHA ADVISORS, LLCReduced115KApr 7, 2026
PATHSTONE HOLDINGS, LLCReduced87KMay 11, 2026
VANGUARD FIDUCIARY TRUST CONew Position69KMay 8, 2026
FMR LLCIncreased52KMay 15, 2026
BLACKROCK, INC.Unchanged50KMay 13, 2026
STATE STREET CORPUnchanged47KMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.