Tortoise Acquisition Corp., trading under the ticker SHLL, filed its S-1 registration statement with the SEC on February 6, 2019, marking one of the earlier SPAC formations of that vintage. Sponsored by Tortoise Acquisition Sponsor LLC, an affiliate of Tortoise Capital Advisors, the blank-check company targeted the clean energy and commercial transportation sector. The SPAC completed its business combination with Hyliion Holdings Corp. in October 2020, with the combined entity rebranding as Hyliion and listing on the New York Stock Exchange under the ticker HYLN, focused on hybrid and fully electric powertrain solutions for Class 8 semi-trucks. Visit SpacDesk and sign up for full data on SHLL, Hyliion, and hundreds of other SPAC transactions.