Overview

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Overview

Note 1. Overview

Hyliion Holdings Corp. is a Delaware corporation headquartered in Cedar Park, Texas, with research and development (“R&D”) facilities in Cincinnati, Ohio, that designs and develops the KARNOTM Power Module for stationary and mobile applications and provides R&D services. References to the “Company,” “Hyliion,” “we,” “our,” or “us” in this report refer to Hyliion Holdings Corp. and its wholly owned subsidiary, unless expressly indicated or the context otherwise requires.

The KARNO Power Module is a complete, fully integrated, enclosed, fuel agnostic power generating solution, including balance of plant such as cooling system, controls, fuel handling, and air handling systems, that generates electricity on command in stationary power generation applications powered by KARNO Cores. The KARNO Core is a linear generator that generates its own heat, and converts thermal energy generated from oxidization of fuels into electrical energy. It uses linear electric motors in a four-shaft system to generate electricity via a flameless oxidation process, achieving near zero emissions without emissions treatment systems.