ESS Tech, Inc.

ESS Tech, Inc. (NYSE: GWH) is a long-duration energy storage company that completed its de-SPAC business combination with ACON S2 Acquisition Corp., a blank-check vehicle sponsored by ACON Investments, and began trading on the New York Stock Exchange in October 2021. The Portland, Oregon-based company develops iron flow battery systems for utility-scale and commercial clean energy applications, operating in the energy storage and industrials sector. ACON S2 priced its IPO in 2020 with a focus on clean energy targets. ESS Tech filed an amended quarterly report on Form 10-Q/A with the SEC on December 6, 2021, reflecting post-combination adjustments to its financial disclosures. Sign up at SpacDesk for full filing history, sponsor data, and analytics on GWH and every active SPAC transaction.