Marc E. F. Haynes

Haynes Group Ltd. is a holding company, which engages in the business of producing and selling automotive and motorcycle repair manuals. It operates under the United Kingdom and Europe, and North America and Australia geographical segments. The United Kingdom and Europe segment includes publication and supply of automotive repair and technical information to the do-it-yourself and professional automotive aftermarkets in both print and digital format. The North America and Australia segment is involved in publishing do-it-yourself repair manuals for cars and motorcycles. The company was founded by John Harold Haynes on May 18, 1960 and is headquartered in Yeovil, the United Kingdom.

Haynes International Motor Museum is a Non-Profit Organization. It engages in promoting public education, appreciation and knowledge in the historical development and evolution of the motor car and other motor vehicles and their attendant parts, designs and technology. The company was founded by John H. Haynes in 1985 and is headquartered in Yeovil, the United Kingdom.

Haynes Developments Ltd. provides commercial and domestic buildings construction services. The company is headquartered in Yeovil, the United Kingdom.