Stem, Inc. (ticker: STPK) traces its public-market origins to Star Peak Energy Transition Corp., a blank-check company sponsored by Star Peak Capital Management that completed its IPO in 2020 targeting the energy transition sector. The SPAC subsequently merged with Stem, Inc., an AI-driven intelligent energy storage and optimization platform, completing the business combination in 2021. The combined company operates in the clean energy technology space, offering software and services that optimize distributed energy resources for commercial and industrial customers. Stem filed an 8-K with the SEC on May 6, 2026, disclosing a material current event. Sign up for SpacDesk to access full filing breakdowns, sponsor profiles, and real-time SPAC deal tracking.