ESS Tech, Inc.

ESS Tech, Inc. (NYSE: GWH) is a Portland, Oregon-based long-duration energy storage company that completed its business combination with ACON S2 Acquisition Corp. in October 2021, with the merger closing formalized in an 8-K filed on October 5, 2021. The blank-check vehicle was sponsored by ACON S2 Partners, an affiliate of Washington, D.C.-based private equity firm ACON Investments, and held its SPAC IPO in 2020. ESS Tech operates in the clean energy and grid-scale storage sector, developing iron flow battery systems designed for commercial and utility applications. Shares trade on the New York Stock Exchange under the ticker GWH. Sign up at SpacDesk for full filing history, deal analytics, and real-time SPAC data on GWH and hundreds of other transactions.