Calculus Capital

Calculus Capital is a privately owned investment company that provides growth capital to UK based, small and medium-sized businesses. They target companies with reputable management teams and the ability to meet a target IRR of 20%. The company's investment strategy includes seeking tax advantages for its investors. The investment firm becomes board members and helps to make strategic decisions. Calculus invests through Enterprise Investment Schemes (EIS) and Venture Capital Trust (VCT) funds, across sectors including healthcare, oil and gas, technology and telecommunications.



Calculus Capital was founded by John Glencross and Susan McDonald in 1999. It is headquartered in London.