Proterra Inc. (Nasdaq: PTRA) is a battery-electric transit bus and commercial vehicle charging infrastructure manufacturer that entered public markets through a de-SPAC merger with ArcLight Clean Transition Corp, a blank-check vehicle sponsored by ArcLight Capital Partners, which closed in June 2021. Operating in the clean transportation and electric vehicle sector, Proterra was among the higher-profile de-SPAC transactions in the EV space. The company subsequently encountered significant financial headwinds and filed for Chapter 11 bankruptcy protection in August 2023, placing it among the most closely watched de-SPAC outcomes of the post-2021 downturn. Sign up on SpacDesk for full filing histories, deal analytics, and real-time data across the de-SPAC universe.