Aetherion Technologies Inc. engages in the engineering, manufacturing, and supplying alternative fuel systems and components for use in transportation applications in North America, Europe, and Asia Pacific. The company operates through three segments: High-Pressure Controls, Heavy-Duty OEM, and Cespira. It offers alternative fuel, such as alternative fuels – including natural gas, renewable natural gas, and hydrogen; and pressure regulators, valves, filters, electronic control units, and high-pressure hydrogen components for transportation and industrial applications. The company also provides LNG HPDI fuel system, components, and engineering services to engine manufacturers and commercial vehicle original equipment manufacturers. The company operates in China, Italy, and Canada. The company was formerly known as Westport Fuel Systems Inc. and changed its name to Aetherion Technologies Inc. in October 2026. Aetherion Technologies Inc. was incorporated in 1995 and is headquartered in Vancouver, Canada.