Ricardo plc provides environmental, technical, and strategic consultancy services in the United Kingdom, Europe, North America, China, rest of Asia, Australia, and internationally. The company operates through Energy and Environment (EE), Rail, Automotive and Industrial (A&I) Established, Automotive and Industrial (A&I) Emerging, Defense, and Performance Products (PP) segments. The EE segment provides environmental consultancy services and data to governments, public agencies, and private businesses. The Rail segment offers technical advice and engineering services, and accredited assurance services. The A&I Established segment engages design, building, and testing services of conventional powertrains to automotive, aerospace, defense, off-highway, commercial, marine and rail sectors. The A&I Emerging segment engages design, development, and testing services of power electronic and propulsion systems, software and digital technologies; and involved in engineering and strategic consulting. This segment serves automotive, aerospace, defense, energy, off-highway, commercial, marine, motorcycle, light personal transport, and rail industries. The Defense segment focuses on software, products, and engineering services for defence sector, as well as involved in operation, maintenance, and support of complex systems. The PP segment manufactures and assembles niche high-quality components, prototypes, and complex products, including engines, transmissions, precision, and performance critical products for motorsport, automotive, aerospace, defense and rail sectors. Ricardo plc serves transportation original equipment manufacturers, suppliers, energy companies and government organizations. The company was founded in 1915 and is headquartered in Shoreham-By-Sea, the United Kingdom. As of October 9, 2025, Ricardo plc operates as a subsidiary of WSP Group plc.