ESS Tech, Inc. (NYSE: GWH) is a long-duration energy storage company that completed its de-SPAC business combination with AEAC Equity Partners Acquisition Corp in October 2021, becoming a publicly traded entity in the clean energy sector. The blank-check vehicle was sponsored by AEAC Equity Partners and conducted its IPO in 2020. The amended quarterly report on Form 10-Q/A, filed December 6, 2021, represents one of the company's earliest post-merger SEC submissions as ESS Tech assumed full public-company reporting obligations following the transaction close. The company develops iron flow battery systems targeting grid-scale, long-duration energy storage applications. Sign up at SpacDesk for complete filing histories, transaction data, and deep analytics on GWH and hundreds of other SPAC companies.