Energy Capital Partners has signed an amendment to its definitive acquisition agreement with EnergySolutions (NYSE: ES) to take the company private for $4.15 per share. The two parties had earlier agreed on $3.75 per share in a transaction with a value enterprise of $1.1 billion. Energy Capital Partners increased its original purchase price to gain broader support of shareholders for the proposed transaction. Based in Salt Lake City, EnergySolutions is an environmental services company that provides decommissioning and remediation services for nuclear sites and facilities around the world, including managing and transporting nuclear material and cleaning up nuclear legacy sites. Morgan Stanley has committed senior secured credit facilities to help finance the acquisition.