PE Firm · Capital Allocator

First Reserve Corporation

Medium
Stamford, USA · Founded 1984 · AUM $14.3 billion · Website
Leveraged buyoutsGrowth capitalVenture capitalEnergyRenewable energySolar energyCoalInfrastructure servicesRefineriesDrillingNorth AmericaEurope
Last verified
7/9/2026

Firm Overview

19
Portfolio tracked
7
Sectors
2
Regions
7/9/2026
Last verified

First Reserve Corporation is a private equity firm that is the oldest and largest fund dedicated to investments in the energy sector.

First Reserve Corporation is a private equity firm specializing in leveraged buyouts and growth capital investments in the energy sector. Founded in 1984, the firm is the oldest and largest private equity fund dedicated to energy investments. As of 2017, it maintained offices in Stamford, Connecticut; Houston, Texas; and London.

The firm has historically focused on raising large-scale energy-focused funds, including Fund XII in 2008 which secured approximately $8.9 billion in investor commitments. In addition to traditional energy deals, First Reserve has expanded into renewable energy, notably acquiring Gamesa Solar in 2008 and forming a European renewable energy group.

Throughout its history, First Reserve has participated in various high-profile transactions across the energy value chain, including infrastructure services, drilling, and refinery acquisitions. Notable achievements include the establishment of Alpha Natural Resources, which grew to become one of the largest coal companies in the United States.

Founded1984
HeadquartersStamford, USA
AUM$14.3 billion
Employees155 (2017)
StrategiesLeveraged buyouts, Growth capital, Venture capital
Sector focusEnergy, Renewable energy, Solar energy, Coal, Infrastructure services, Refineries, Drilling
Geographic focusNorth America, Europe

Leadership

Alex T. Krueger
Chairman

Notable Investments

Gamesa SolarPBF EnergyCHC HelicopterBrand ServicesDresser-RandPride InternationalEnterra CorporationAlpha Natural Resources

Historical and current deals referenced in public sources.

Portfolio Companies

Sources

This profile is based on publicly available information and may be incomplete or outdated. PE Firm Index is not affiliated with First Reserve Corporation and does not provide investment advice.

More PE firms in Energy

Browse the full PE firms directory.