Hyliion Holdings Corp. — originally incorporated as Tortoise Acquisition Corp. and listed on the New York Stock Exchange under the ticker SHLL — completed its blank-check company initial public offering in 2019, targeting the clean energy and sustainable transportation sector. The SPAC was sponsored by Tortoise Capital Advisors, a Kansas City-based investment manager with an established focus on energy infrastructure and sustainability-oriented strategies. In June 2020, Tortoise Acquisition Corp. announced a business combination with Hyliion Inc., a developer of hybrid-electric powertrain systems aimed at reducing emissions across Class 8 commercial trucking fleets. The transaction closed in October 2020, with the combined company rebranding as Hyliion Holdings Corp. and trading on the NYSE under the ticker HYLN. Sign up at SpacDesk for complete filing history, deal analytics, and real-time data on SHLL and thousands of other SPAC transactions.