Proterra Inc. (Nasdaq: PTRA) was an electric vehicle technology company focused on battery-electric transit buses and EV powertrain systems that went public in June 2021 through a merger with ArcLight Clean Transition Corp, a SPAC sponsored by ArcLight Capital Partners. The company operated in the clean transportation and electrification sector. Proterra filed for Chapter 11 bankruptcy protection in August 2023, citing capital market conditions and liquidity challenges, and subsequently sold its business units through court-supervised processes. The March 2024 Form 8-K filing reflects activity during the company's post-bankruptcy wind-down period. Sign up at SpacDesk for full filing history, sponsor data, and deal analytics on PTRA and hundreds of other SPAC transactions.