Signature Aviation Plc manufactures aircraft parts and provides flight support services. It operates through the Signature, and Ontic segments. The Signature segment provides refueling, ground handling, line maintenance and other services to the Business & General Aviation, and commercial aviation markets. The Ontic segment maintains and supports aerospace components, sub-systems and systems. The company was founded by William Fenton and Walter Wilson Cobbett in 1879 and is headquartered in London, the United Kingdom.