Top Energy Private Equity Firms

1. First Reserve

First Reserve Corporation is a specialist private equity firm focused on investments in energy companies. First Reserve targets equity investments of $50 to $500 million in companies valued from $100 million to $10 billion. First Target areas of interest within the energy industry include energy manufacturing and services (drilling service providers and wellhead equipment manufacturers), energy infrastructure, energy reserves, renewable energy and alternative fuels, and energy related insurance and financial products. First Reserve was established in 1983 and has offices in Greenwich, Connecticut; Houston, Texas; and London.

2. Riverstone Holdings

Riverstone is a large specialist private equity firm focused on opportunities in the energy and power industry. Specific sectors of interest include oil & gas exploration, midstream transportation/logistics, electric generation, energy & power service, and energy & power technology. Riverstone was formed in 2000 and is based in New York City with additional offices in London and Houston.

3. Natural Gas Partners

Natural Gas Partners is a specialist private equity firm focused on investments in the energy industry. The Firm looks for opportunities in oil and gas production, as well as midstream and oilfield service companies. Natural Gas Partners will also consider start-up company investments. Natural Gas Partners is an affiliate of energy investment firm NGP Energy Capital Management. The Group was formed in 1988 and is headquartered in Irving, Texas with additional offices in Houston; Santa Fe, New Mexico; Stamford, Connecticut; and London.

4. ArcLight Capital

ArcLight Capital Partners is private equity firm that invests in energy assets and businesses. Specific areas of interest include power generation; oil, natural gas, coal extraction and production; midstream gathering, processing, storage and transportation of oil, natural gas, coal; energy transportation; and energy distribution companies. ArcLight's geographic coverage includes opportunities across North America, Western Europe, and Australia/New Zealand. ArcLight was formed in 2000 and has offices in Boston, Massachusetts; New York, New York; London; and Luxembourg.

5. Lime Rock Partners

Lime Rock Partners is a private investment firm focused on growth capital investments in the energy industry. Specifically, Lime Rock looks for companies engaged in exploration & production, energy service, and oil service technology in North America and Europe. Lime Rock's target investment size is $25 to $150 million in businesses valued up to $500 million. Lime Rock Partners was formed in 1998 and is affiliated with Lime Rock Resources. Lime Rock Partners has offices in Westport, Connecticut; Aberdeen, Scotland; and Houston, Texas.