ESS Tech, Inc. - Common Stock, par value $0.0001 per share (GWH) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2024 to Q4 2025

Type / Class
Equity / Common Stock, par value $0.0001 per share
Symbol
GWH on NYSE
Shares outstanding
11,866,238
Price per share
$1.88
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
3,745,456
Total reported value
$5,692,877
% of total 13F portfolios
0%
Share change
+724,836
Value change
+$1,124,978
Number of holders
44
Price from insider filings
$1.88
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of ESS Tech, Inc. - Common Stock, par value $0.0001 per share (GWH) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SOFTBANK GROUP CORP. 20% $5,465,114 2,396,980 SB Energy Global Holdings One Ltd. 23 Aug 2024

As of 30 Sep 2025, 44 institutional investors reported holding 3,745,456 shares of ESS Tech, Inc. - Common Stock, par value $0.0001 per share (GWH). This represents 32% of the company’s total 11,866,238 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of ESS Tech, Inc. - Common Stock, par value $0.0001 per share (GWH) together control 32% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
SOFTBANK GROUP CORP. 20% 2,396,980 0% 0.01% $3,643,410
Arosa Capital Management LP 5.7% 675,417 1.6% $1,026,634
VANGUARD GROUP INC 2.2% 264,332 +15% 0% $401,784
GEODE CAPITAL MANAGEMENT, LLC 0.48% 56,813 +5% 0% $86,374
BlackRock, Inc. 0.45% 53,149 +0.01% 0% $80,786
FMR LLC 0.44% 52,485 0% 0% $79,777
JANE STREET GROUP, LLC 0.41% 48,958 0% $74,416
Yorkville Advisors Global, LP 0.41% 48,374 0.03% $73,528
RENAISSANCE TECHNOLOGIES LLC 0.23% 27,560 0% 0% $41,891
XTX Topco Ltd 0.18% 20,860 +42% 0% $31,707
CITADEL ADVISORS LLC 0.17% 19,773 0% $30,055
STATE STREET CORP 0.14% 16,304 0% 0% $24,782
UBS Group AG 0.13% 14,853 +297% 0% $22,576
Green Alpha Advisors, LLC 0.09% 10,628 -14% 0.02% $16,155
NORTHERN TRUST CORP 0.09% 10,588 0% 0% $16,094
MORGAN STANLEY 0.04% 5,217 -1.7% 0% $7,930
Tower Research Capital LLC (TRC) 0.04% 4,648 +61% 0% $7,065
Golden State Wealth Management, LLC 0.02% 2,720 +0.48% 0% $4,134
CWM, LLC 0.02% 2,666 0% 0% $4,000
BANK OF AMERICA CORP /DE/ 0.02% 2,553 +1.2% 0% $3,881
PNC Financial Services Group, Inc. 0.02% 2,443 0% 0% $3,713
OSAIC HOLDINGS, INC. 0.02% 2,264 -18% 0% $3,285
BARCLAYS PLC 0.01% 1,670 0% 0% $2,538
NATIONAL BANK OF CANADA /FI/ 0.01% 832 0% 0% $1,240
Missouri Trust & Investment Co 0.01% 633 +90% 0% $962

Institutional Holders of ESS Tech, Inc. - Common Stock, par value $0.0001 per share (GWH) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 118,902 $223,537 +$203,339 $1.88 4
2025 Q3 3,745,456 $5,692,877 +$1,124,978 $1.52 44
2025 Q2 3,020,491 $4,017,443 -$1,213,324 $1.33 46
2025 Q1 3,367,144 $10,976,191 -$499,359 $3.26 43
2024 Q4 3,477,362 $20,447,613 +$1,195,176 $5.88 53
2024 Q3 3,268,537 $20,657,023 +$20,170,946 $6.32 45
2024 Q2 23,400 $19,139 +$19,139 $0.82 1