WILSONVILLE, OR
ESS TECH, INC.GWH-WT— Latest position per institution from SEC 13F filings
15
Institutional holders
10.07M
Total shares held
8.24M
Estimated value
503.42K
Avg. position size
SOFTBANK GROUP CORP.
CIK 1065521
Shares
2.40M
Value
2.28M
Filed
Jun 30, 2026
ALYESKA INVESTMENT GROUP, L.P.
CIK 1453072
Shares
1.40M
Value
1.33M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
638.92K
Value
606.97K
Filed
Jun 30, 2026
UBS GROUP AG
CIK 1610520
Shares
602.61K
Value
572.48K
Filed
Jun 30, 2026
CVI HOLDINGS, LLC
CIK 1728194
Shares
586.22K
Value
40.98K
Filed
Jun 30, 2024
AROSA CAPITAL MANAGEMENT LP
CIK 1596053
Shares
550K
Value
522.50K
Filed
Jun 30, 2026
HEIGHTS CAPITAL MANAGEMENT, INC
CIK 1081698
Shares
510.72K
Value
2.81K
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
485.92K
Value
913.53K
Filed
Dec 31, 2025
CASTLE CREEK ARBITRAGE, LLC
CIK 1326638
Shares
412.02K
Value
73.96K
Filed
Sep 30, 2023
LMR PARTNERS LLP
CIK 1578621
Shares
391.28K
Value
2.15K
Filed
Jun 30, 2026
BAIRD FINANCIAL GROUP, INC.
CIK 1648711
Shares
367.52K
Value
1.20M
Filed
Mar 31, 2025
SABA CAPITAL MANAGEMENT, L.P.
CIK 1510281
Shares
303.60K
Value
1.67K
Filed
Jun 30, 2026
OPENARC CORPORATE ADVISORY, LLC
CIK 2111345
Shares
253.56K
Value
177.00
Filed
Sep 30, 2026
MILLENNIUM MANAGEMENT LLC
CIK 1273087
Shares
250K
Value
1.38K
Filed
Jun 30, 2026
SHAY CAPITAL LLC
CIK 1723643
Shares
210.15K
Value
199.64K
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
210.04K
Value
199.55K
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
133.87K
Value
127.17K
Filed
Jun 30, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
129.88K
Value
123.38K
Filed
Jun 30, 2026
PRIVIUM FUND MANAGEMENT B.V.
CIK 1795097
Shares
117.68K
Value
25.45K
Filed
Mar 31, 2023
BUSEY BANK
CIK 1427202
Shares
117.40K
Value
19.96K
Filed
Sep 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | SOFTBANK GROUP CORP. | 1065521 | 2.40M | 2.28M | Jun 30, 2026 |
| 2 | ALYESKA INVESTMENT GROUP, L.P. | 1453072 | 1.40M | 1.33M | Jun 30, 2026 |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 638.92K | 606.97K | Jun 30, 2026 |
| 4 | UBS GROUP AG | 1610520 | 602.61K | 572.48K | Jun 30, 2026 |
| 5 | CVI HOLDINGS, LLC | 1728194 | 586.22K | 40.98K | Jun 30, 2024 |
| 6 | AROSA CAPITAL MANAGEMENT LP | 1596053 | 550K | 522.50K | Jun 30, 2026 |
| 7 | HEIGHTS CAPITAL MANAGEMENT, INC | 1081698 | 510.72K | 2.81K | Jun 30, 2026 |
| 8 | VANGUARD GROUP INC | 102909 | 485.92K | 913.53K | Dec 31, 2025 |
| 9 | CASTLE CREEK ARBITRAGE, LLC | 1326638 | 412.02K | 73.96K | Sep 30, 2023 |
| 10 | LMR PARTNERS LLP | 1578621 | 391.28K | 2.15K | Jun 30, 2026 |
| 11 | BAIRD FINANCIAL GROUP, INC. | 1648711 | 367.52K | 1.20M | Mar 31, 2025 |
| 12 | SABA CAPITAL MANAGEMENT, L.P. | 1510281 | 303.60K | 1.67K | Jun 30, 2026 |
| 13 | OPENARC CORPORATE ADVISORY, LLC | 2111345 | 253.56K | 177.00 | Sep 30, 2026 |
| 14 | MILLENNIUM MANAGEMENT LLC | 1273087 | 250K | 1.38K | Jun 30, 2026 |
| 15 | SHAY CAPITAL LLC | 1723643 | 210.15K | 199.64K | Jun 30, 2026 |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 210.04K | 199.55K | Jun 30, 2026 |
| 17 | BLACKROCK, INC. | 2012383 | 133.87K | 127.17K | Jun 30, 2026 |
| 18 | VANGUARD FIDUCIARY TRUST CO | 933478 | 129.88K | 123.38K | Jun 30, 2026 |
| 19 | PRIVIUM FUND MANAGEMENT B.V. | 1795097 | 117.68K | 25.45K | Mar 31, 2023 |
| 20 | BUSEY BANK | 1427202 | 117.40K | 19.96K | Sep 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.