Tortoise Acquisition Corp (NYSE: SHLL) was a blank-check company sponsored by Tortoise Capital Advisors, a Kansas-based asset manager focused on energy infrastructure. The SPAC completed its IPO in 2019 targeting the energy transition and transportation sectors. In September 2020, the company filed a definitive merger proxy with the SEC in connection with its proposed business combination with Hyliion Holdings, a developer of electrification and natural gas powertrain solutions for Class 8 commercial trucks. The transaction closed in October 2020, with the combined company rebranding and trading under the ticker HYLN on the NYSE. For complete filing histories, deal timelines, and sponsor analytics on SHLL and thousands of other SPACs, sign up for full access at SpacDesk.