Energy Capital Partners

Energy Capital Partners (ECP) was founded in 2005 by former Goldman Sachs executives Doug Kimmelman, Thomas Lane, and Scott Helm. The firm is headquartered in Summit, New Jersey, and has established itself as a major investor in energy-related assets, including power generation, renewable energy, and energy storage. In 2024, ECP merged with Bridgepoint Group to create a broader private assets investment platform, which helped the firm expand its footprint into Europe.

The firm has a history of high-profile transactions, including its participation in the $44 billion buyout of Energy Future Holdings, which remains the largest leveraged buyout in history. ECP has also been active in forming energy platforms like Summit Midstream Partners and recently partnered with KKR to invest $50 billion in data center and power generation projects to support artificial intelligence development. Recent activity includes notable exits such as the $26.6 billion sale of Calpine to Constellation Energy in 2025.