Companies / ESS Tech, Inc.
ESS Tech, Inc.
NYSE: GWHCIK 1819438WILSONVILLE, OR
Financials · FY2025
Ownership
33.0M shares outstanding · as of Aug 6, 2026
Ownership
| Insiders | 1.15% | 380,267 |
| 10%+ / strategic | 4.25% | 1,400,000 |
| Institutions | 18.72% | 6,172,851 |
| Public float | 75.88% | 25,016,907 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 3
View all →| Insider | % of shares | Shares |
|---|---|---|
Goodman Kelly F.SEE REMARKS | 0.65% | 215,853 |
Suhadolnik Kate EileenChief Financial Officer | 0.50% | 164,414 |
Buckley Drew PCEOCEO · Director | — | — |
Institutional holders 58
View all →| Holder | Value | % of shares |
|---|---|---|
| $2.80M | 7.27% | |
| $2.63M | 4.25% | |
| $1.79M | 2.88% | |
| $1.13M | 2.92% | |
| $913.5K | 1.47% | |
| $338.4K | 0.55% | |
| $261.6K | 0.68% | |
| $223.1K | 0.36% | |
| $204.9K | 0.33% | |
| $167.3K | 0.27% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Heights Capital Management, Inc 13F manager | New | Common Stock | $1.13M | +963K | 963,495 2.92% of shares | low |
| Q1 2026 as of | Geode Capital Management, LLC 13F manager | Add | Common Stock | $101.9K | +87K +63.82% | 223,561 0.68% of shares | low |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common Stock | $79.3K | +83K +165.77% | 133,867 0.41% of shares | low |
| Q2 2026 as of | LPL Financial LLC 13F manager | Exit | Common Stock | $-26.8K | -14K -100.00% | — | low |
| Q1 2026 as of | Millennium Management LLC 13F manager | Exit | Common Stock | $-19.0K | -10K -100.00% | — | low |
| Q1 2026 as of | Bridgeway Capital Management, LLC 13F manager | Add | Common Stock | $11.7K | +10K +100.00% | 20,000 0.06% of shares | low |
| Q4 2024 as of | Barclays PLC 13F manager | Add | Common Stock | $9.2K | +2K +1570.00% | 1,670 <0.01% of shares | low |
| Q2 2026 as of | The PNC Financial Services Group, Inc. 13F manager | Exit | Common Stock | $-4.6K | -2K -100.00% | — | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Alyeska Investment Group, L.P. | Passive13G | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| GWH | Common Stock | 26916J205 |