| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2021-10-21 | Pangaea Ventures Fund III, LP | ESS Tech, Inc. | 10,828,646 | 8.0% | EDGAR |
| SC 13G | 2021-10-20 | BASF Venture Capital GmbH | ESS Tech, Inc. | 7,973,282 | 5.9% | EDGAR |
| SC 13D | 2021-10-18 | Cycle Capital Fund III, L.P. | ESS Tech, Inc. | 9,745,399 | 7.2% | EDGAR |
| SC 13D | 2021-10-18 | BREAKTHROUGH ENERGY INVESTMENTS LLC | ESS Tech, Inc. | 16,037,874 | 11.9% | EDGAR |
| SC 13G | 2021-03-30 | RP Investment Advisors LP | ACON S2 Acquisition Corp. | 1,283,795 | 5.1% | EDGAR |
| SC 13G | 2021-02-16 | GLAZER CAPITAL, LLC | ACON S2 Acquisition Corp. | 2,113,988 | 8.5% | EDGAR |
| SC 13G | 2021-02-12 | ACON S2 Sponsor, L.L.C. | ACON S2 Acquisition Corp. | 6,100,000 | 19.5% | EDGAR |
| SC 13G | 2020-09-25 | Weiss Asset Management LP | ACON S2 Acquisition Corp. | 2,000,000 | 8.0% | EDGAR |