American Wind Capital

American Wind Capital was formed to purchase long-term cash flows from landowners who receive royalty income from wind and renewable power projects in the U.S.

Community Energy

CEI is one of the leading REC marketers and utility-scale solar/wind project developers, focused principally in the Northeast, Mid-Atlantic and Midwest.

Environmental Drilling Solutions

Environmental Drilling Solutions is a leader in innovative rig containment vacuums, cuttings, handling, cuttings collection, cuttings drying, solids control, and zero discharge technology.

Flogistix

Flogistix is an oil & gas production services company that specializes in natural gas and coal bed methane compression systems.

GeoDigital International

GeoDigital International provides airborne inspection and asset management services for the electric utility and oil and gas pipeline sectors.

GreatPoint Energy

GreatPoint Energy is a developer of a catalytic gasification technology that converts abundant, low-cost feedstocks, such as coal, petroleum coke and biomass, into clean, pipeline-quality natural gas.

groSolar

groSolar is a leading distributor and installer of commercial solar energy systems in the U.S.

LedEngin, Inc.

LedEngin is a solid-state lighting company specializing in high-performance LED lighting components, modules and replacement lamps.

Lehigh Technologies

Lehigh Technologies produces micronized rubber powders from end-of-life tire materials and other post-industrial rubber.

Living Earth

Living Earth is the largest recycler of organic materials in Texas.

Managed Pressure Operations

Managed Pressure Operations International is an oilfield services company that provides technologically advanced and cost-effective continuous circulation and managed pressure drilling systems.

Penn Power Group

Penn Power Group offers a full range of products and services that are used in the on-highway transportation, off-highway construction and industrial markets, transport refrigeration, coach and bus climate control, power generation and renewable power generation markets.

Power-One (NASDAQ - PWER)

Power-One is a leading provider of renewable energy and energy-efficient power conversion and power management solutions - Fully realized (secondary sale in January 2011)

Renewable Energy Group (NASDAQ - REGI)

Renewable Energy Group is the leading U.S. producer and marketer of biodiesel.

Satcon Technology Corporation (NASDAQ - SATC)

Satcon Technology develops and manufactures high quality power systems and power electronics for the renewable energy, grid support and advanced power technology sectors - Partially realized (secondary sale in August 2010)

TPI Composites

TPI Composites manufactures large composite structures for the wind energy, transportation, and military vehicle markets.

Turbine Air Systems

Turbine Air Systems is a leading provider of packaged modular energy systems for various end-markets, including turbine inlet cooling, combined heat and power, and geothermal.

Wellbore Energy Solutions, LLC

Wellbore Energy Solutions provides proprietary downhole tools and support service for the oil and gas industry – Fully realized (sold to Halliburton Company in February 2010)

Xunlight

Xunlight Corporation develops and manufactures low cost, flexible amorphous silicon solar modules.