Hyliion Holdings Corp.

Hyliion Holdings Corp., which trades under the original SPAC ticker SHLL, was formed through the 2020 business combination between Tortoise Acquisition Corp. and Hyliion Inc., a developer of electrified powertrain solutions for Class 8 commercial vehicles. Tortoise Acquisition Corp. was sponsored by Tortoise Capital Advisors and completed its IPO in 2020, targeting the clean transportation and energy technology sector. The company, now publicly listed on the New York Stock Exchange, has continued to file periodic disclosures with the SEC, including the 8-K submitted on May 19, 2026. For complete filing history, deal terms, and sponsor data on Hyliion Holdings and hundreds of other SPACs, sign up for full access at SpacDesk.