Hyliion Holdings Corp. completed its de-SPAC transaction in October 2020 through a merger with Tortoise Acquisition Corp., which traded on Nasdaq under the ticker SHLL and was sponsored by Tortoise Capital Advisors. The combined company, operating in the clean transportation technology sector, develops electrified powertrain solutions for Class 8 commercial semi-trucks and is headquartered in Cedar Park, Texas. Following the merger, the company listed under the ticker HYLN. Hyliion filed this 10-K annual report with the SEC on February 24, 2022, documenting its post-merger operations and product development progress in hybrid and fully electric drivetrain systems for the long-haul freight industry. Sign up on SpacDesk for full filings, data, and analytics on Hyliion and hundreds of other SPAC transactions.