Proterra...
Founded in 2004, it became a public company in June 2021. The company delivered 199 new transit buses and battery systems for 1,229 vehicles in 2022. The company filed for Chapter 11 bankruptcy in August 2023. In November, its assets were auctioned to three companies.
Sounds like they made a low quality product. No supply base, custom builds, and dependent on FedGov incentives.