Private equity investor Energy Capital Partners is acquiring Calpine, a top producer of natural gas, for $5.6B, or $15.25 cash per-share, a 51 percent premium for stockholders.

Calpine chairman Frank Cassidy said the transaction follows "an exhaustive review of strategic alternatives undertaken by our board" and is the best way to maximize shareholder view and "unlock the company's intrinsic value."

Garrison Energy Center

ECP expressed strong support for Calpine's management and growth prospects. "We do not expect to make any changes to the way Calpine operates its business and intend to remain focused on providing the high level of service to which Calpine’s wholesale and retail customers have become accustomed," said Tyler Reeder, ECP partners.

Calpine, which is the nation's largest generator of electricity from natural gas and geothermal resources, owns 80 plans that serves customers in 25 states, Canada and Mexico.

SV&C's Jared Levy, Patrick Scanlan and Frances Jeter represent Calpine.