Clean Energy Fuels Corp. (Clean Energy) is a provider of natural gas as an alternative fuel for vehicle fleets in the United States and Canada. The Company is engaged in supplying compressed natural gas (CNG), liquefied natural gas (LNG) and renewable natural gas (RNG) for light, medium and heavy-duty vehicles, and providing operation and maintenance (O&M) services for natural gas fueling stations. The Company designs, builds, operates and maintains fueling stations; manufactures, sells and services non-lubricated natural gas fueling compressors and other equipment used in CNG stations and LNG stations; offers assessment, design and modification solutions to provide operators with code-compliant service and maintenance facilities for natural gas vehicle fleets, and transports and sells CNG and LNG to industrial and institutional energy users having no direct access to natural gas pipelines, among others.