ESS Tech, Inc.

ESS Tech, Inc. completed its de-SPAC merger in October 2021 after combining with ACON S2 Acquisition Corp. (NYSE: STWO), a blank-check vehicle that held its IPO in November 2020. The sponsor behind ACON S2 was ACON S2 Sponsor LLC, an affiliate of Washington, D.C.-based private equity firm ACON Investments, LLC. ESS Tech operates in the clean energy sector, developing iron flow battery systems designed for grid-scale, long-duration energy storage. The combined company began trading on the NYSE under the ticker GWH following the close of the transaction, and has since filed a series of current reports, including an 8-K/A amendment dated August 26, 2024. For complete filing history, deal terms, and sponsor data on ESS Tech and hundreds of other SPAC transactions, sign up for full access at SpacDesk.