ESS Tech, Inc.

ESS Tech, Inc. (NYSE: GWH) is a long-duration energy storage company that came to market through a SPAC merger with AEAC Equity Partners Acquisition Corp., sponsored by AEAC Equity Partners LLC, which completed its IPO in 2020 and closed the business combination in October 2021. Headquartered in Wilsonville, Oregon, ESS Tech operates in the clean energy and grid-scale storage sector, developing iron flow battery systems designed to deliver extended discharge durations for utility, microgrid, and commercial renewable-integration applications. The company filed an 8-K with the SEC on September 3, 2026 under accession number 0001819438-26-000080. For complete filing history, ownership data, and real-time SPAC analytics on GWH and hundreds of other transactions, create a free account on SpacDesk.