ESS Tech, Inc.

ESS Tech, Inc. (NYSE: GWH) is a long-duration energy storage company that reached public markets through a business combination with ACON S2 Acquisition Corp, a blank-check vehicle sponsored by ACON Investments. The SPAC completed its initial public offering in 2020 and operated in the clean energy and industrial technology sector, focused on utility-scale iron flow battery systems designed for grid storage applications. The November 2020 Form 10-Q represents one of the SPAC's early quarterly filings following its IPO, predating the announced merger with ESS Tech. The business combination closed in 2021, establishing GWH as a publicly traded pure-play energy storage issuer on the New York Stock Exchange. Sign up for full data on SpacDesk to access complete filings, deal timelines, and analytics for GWH and hundreds of other SPAC transactions.