Westport makes fuel system components and technologies that allow heavy-duty trucks, buses, and industrial equipment to run on alternative fuels — primarily natural gas, renewable natural gas (RNG), and hydrogen — instead of diesel. The company operates through two segments. The first is Cespira, a joint venture with Volvo in which Westport holds a 55% stake, which supplies HPDI (High Pressure Direct Injection) fuel systems that allow diesel engines to run predominantly on LNG or RNG while maintaining diesel-equivalent power and efficiency. Cespira sells complete HPDI fuel systems to truck OEMs on a per-unit basis, with roughly 9,000 trucks on the platform across 31 countries, primarily in Europe. The second is High-Pressure Controls, which sells precision pressure regulators, valves, filters, and ECUs under the GFI brand to OEMs and Tier-1 suppliers across truck, bus, rail, and industrial markets. This segment is heavily exposed to China, where hydrogen commercial vehicles are growing, and manufactures out of Cambridge, Ontario and Changzhou, China. Westport sells primarily through direct OEM relationships and long-term supply agreements involving deep engineering collaboration. Both businesses have long sales cycles tied to OEM development programs. Westport's near-term growth priorities are expanding Cespira's OEM base beyond Volvo and building a CNG fuel system business in North America, where fleet interest in alternative fuels is growing as electrification economics remain challenging.