Hyliion Holdings Corp. emerged from a de-SPAC transaction with Tortoise Acquisition Corp. (Nasdaq: SHLL), a blank-check company sponsored by Tortoise Capital Advisors that completed its initial public offering in 2020. The deal brought Hyliion, a developer of electrified powertrain solutions for Class 8 commercial trucks, into the public markets and placed it within the clean transportation and commercial vehicle electrification sector. Following the business combination, the combined company traded on the New York Stock Exchange under the ticker HYLN. Hyliion has since continued filing periodic disclosures with the SEC, including the 8-K filed on August 11, 2026. Sign up at SpacDesk for full filing history, sponsor profiles, and real-time data on this and every other SPAC.