ESS Tech, Inc. (GWH)
OTC: GWH · Miscellaneous Electrical Machinery, Equipment & Supplies · Wilsonville, OR · filing with the SEC since 2020
Who owns ESS Tech, Inc.
As filed with the SECHolders of 5% or more
2
SB Energy Global Holdings One Ltd. holds 20.2% of Common Stock, par value $0.0001 per share, as its SCHEDULE 13D/A filed Mar 3, 2025 says.
Directors and officers
11
report now, of 28 people on the record since 2020. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
SB Energy Global Holdings One Ltd.
SCHEDULE 13D/A · filed Mar 3, 2025 · Common Stock, par value $0.0001 per share
Ayrton Capital LLC
SCHEDULE 13G/A · filed Aug 13, 2026 · Common Stock, $0.0001 par value per share · 9.99% in May 11, 2026
Alyeska Investment Group, L.P.
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, $0.0001 par value per share · reported falling below 5%, from 5.15% in May 15, 2026
What GWH reports owning in othersstakes of 5% or more, and other ties
ESS Tech, Inc. reports no stake in another company in the record.
Insider tradesForm 4
8sales
1purchases
0sales on a scheduled plan
2people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 32 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Buckley Drew P | CEO | 0 | $0 | 0 | 1 | $0 |
| Suhadolnik Kate Eileen | Chief Financial Officer | 4 | $0 | 0 | 0 | $0 |
| Goodman Kelly F. | Officer title: Chief Strategy Officer and General Counsel | 4 | $0 | 0 | 0 | $0 |