Proterra (ArcLight Clean Transition) ^{Priced, Nasdaq: PTRA}

ArcLight Clean Transition Corp. is a newly incorporated blank check company. We intend to pursue opportunities created by the accelerating transition toward sustainable use of energy and natural resources. The renewable energy sector has emerged from a niche source of electricity to be the key driver of growth in the industry, with an estimated $1.5 trillion invested globally between 2015 through 2019 according to IEA. Our sponsor has been a leader in identifying this trend and making investments in the renewable energy sector. Our primary areas of focus include products, equipment, services and technologies enabling the continued decarbonization of the economy. We plan to target companies that serve rapidly growing segments in the clean energy ecosystem, including renewable power generation, energy storage, the distributed electrical grid, zero-emission transportation, renewable fuels, carbon capture, utilization and storage, zero/low-carbon industrial applications and sustainable manufacturing. We believe that market leaders within these high-impact segments can deliver superior long-term returns to equity investors. Our sponsor is an affiliate of ArcLight Capital Partners, LLC, one of the leading firms focused on energy infrastructure investments in North America.