ESS Tech, Inc.

ACON S2 Acquisition Corp (Nasdaq: STWO), sponsored by ACON Investments through ACON S2 Sponsor LLC, completed its SPAC IPO in 2020 with a focus on the clean energy and sustainability sector. In May 2021 the company filed an 8-K disclosing its definitive merger agreement with ESS Tech, Inc., a developer of long-duration iron flow battery energy storage systems aimed at grid-scale applications. The transaction subsequently closed later that year, taking ESS Tech public under the STWO ticker. The combined company operates in the clean energy storage industry, targeting utility and commercial customers seeking multi-hour discharge solutions. Visit SpacDesk and sign up for full filing history, deal terms, and real-time SPAC analytics on STWO and hundreds of other transactions.