GWH-WS Institutional Ownership & Shareholders
ESS TECH INC -CW27 (GWH-WS) is currently held by 9 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $8,835 based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Heights Capital Management, Inc is currently the largest disclosed institutional shareholder of GWH-WS tracked by InsiderSet, reporting ownership valued at approximately $2,809 in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2,808.966, representing an estimated loss of -0.00% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed GWH-WS value among the investors covered in this analysis. Major shareholders include Heights Capital Management, Inc, Lmr Partners Llp, Saba Capital Management, L.P., and several other long-term asset managers with concentrated positions in ESS TECH INC -CW27 (GWH-WS).
This page ranks the largest institutional GWH-WS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
9
Total Reported Value
$8,835
Largest Holder
Heights Capital Management, Inc
Largest Position
$2,809
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
16
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Heights Capital Management, Inc | 0.00% | 510,721 | $2,809 | $2,809 | -$0 | -0.00% | |
| Lmr Partners Llp | 0.00% | 391,284 | $2,152 | $2,152 | +$0 | +0.00% | |
| Saba Capital Management, L.P. | 0.00% | 303,596 | $1,670 | $1,670 | -$0 | -0.01% | |
| Vestcor Inc | 0.00% | 105,182 | $1,000 | $579 | -$421 | -42.15% | |
| Susquehanna International Group, Llp | 0.00% | 107,548 | $592 | $592 | -$0 | -0.08% | |
| Jane Street Group, Llc | 0.00% | 58,356 | $321 | $321 | -$0 | -0.01% | |
| Openarc Corporate Advisory, Llc | 0.00% | 253,555 | $177 | $1,395 | +$1,218 | +687.88% | |
| Marathon Trading Investment Management Llc | 0.00% | 20,130 | $111 | $111 | -$0 | -0.26% | |
| Clear Street Group Inc. | 0.00% | 600 | $3 | $3 | +$0 | +10.00% |
Frequently asked questions about GWH-WS
Who are the largest institutional holders of GWH-WS?
The largest institutional holders of GWH-WS reported in the latest SEC Form 13F filings include Heights Capital Management, Inc, Lmr Partners Llp, Saba Capital Management, L.P., Vestcor Inc, and Susquehanna International Group, Llp. InsiderSet ranks institutional holders by their latest reported GWH-WS position.
What is GWH-WS institutional ownership?
This page tracks GWH-WS positions reported by institutional investment managers through SEC Form 13F. ESS TECH INC -CW27 (GWH-WS) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own GWH-WS?
InsiderSet currently tracks 9 institutional managers reporting GWH-WS holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of GWH-WS shareholders.
How much GWH-WS stock do institutions own?
Institutional investment managers disclosed approximately $8,835 in GWH-WS holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was GWH-WS institutional ownership last updated?
The latest GWH-WS institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional GWH-WS holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its GWH-WS position after the reporting date.
Are institutions buying or selling GWH-WS?
Institutional buying and selling can be analyzed by comparing GWH-WS positions across consecutive 13F reporting periods. InsiderSet's GWH-WS Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View GWH-WS ownership changes.
How has GWH-WS institutional ownership changed over time?
InsiderSet tracks GWH-WS institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.