Hyliion Holdings Corp., which trades under the ticker SHLL, is a clean-energy technology company focused on electrified powertrain solutions and distributed power generation for commercial transportation. The company came public in 2020 through Tortoise Acquisition Corp., a blank-check vehicle sponsored by Tortoise Capital Advisors, completing one of that year's high-profile de-SPAC transactions in the commercial vehicle electrification space. Hyliion has since evolved its product focus, centering on its KARNO heat-engine generator platform as its core technology offering. The company filed its 10-K annual report with the SEC on February 25, 2026. For comprehensive data on Hyliion Holdings Corp., including filing history, financial metrics, and SPAC transaction details, sign up for full access at SpacDesk.