Guy Merison

Hartree Partners LP (Investment Management) (Hartree Partners-IM) is the investment management division of Hartree Partners LP, a global merchant commodities firm headquartered in New York City. It was originally founded as Hess Energy Trading Co. (HETCO) in 1997 by Guy Merison, Stephen Semlitz and Stephen Hendel. In 2014, it was announced that funds controlled by Oaktree Capital would be acquiring Hess Corp.’s interests in HETCO with the new company taking the name Hartree Partners LP. The firm is owned by the founding partners, senior staff, and certain funds managed by Oaktree Capital Management LP. Hartree Partners-IM provides a wide range of investment services to a substantial and diversified customer base that includes corporations, financial institutions, governments and individuals.

Hartree Partners LP engages in the provision of merchant commodities. The firm specializes in energy and its associated industries. Its services include proprietary trading and arbitrage, risk management, structured transactions, consultancy, and principal investing. The company was founded by Stephen Michael Hendel, Stephen Michael Semlitz and, Guy Merison in March 1997 and is headquartered in New York, NY.