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... Creating Power for a Sustainable Future

Calpine to Announce Second Quarter 2008 Earnings on August 11

07/28/2008

HOUSTON & SAN JOSE, Calif.--(BUSINESS WIRE)--July 28, 2008--Calpine Corporation (NYSE:CPN) announced today that it plans to release second quarter 2008 financial results on Monday, August 11, 2008 before the opening of the New York Stock Exchange. Management will discuss the results during an investor call scheduled for 11 a.m. ET / 10 a.m. CT on August 11.

A listen-only webcast of the call may be accessed through the Company's website at www.calpine.com, or by dialing 888-204-4485 at least ten minutes prior to the beginning of the call. An archived recording of the call will be made available on the website, and can also be accessed by dialing 888-203-1112 or 719-457-0820 (International) and providing confirmation code 2254630.

About Calpine

Calpine Corporation is helping meet the needs of an economy that demands more and cleaner sources of electricity. Founded in 1984, Calpine is a major U.S. power company, currently capable of delivering nearly 24,000 megawatts of clean, cost-effective, reliable, and fuel-efficient electricity to customers and communities in 18 states in the United States. The Company owns leases and operates low-carbon, natural gas-fired, and renewable geothermal power plants. Using advanced technologies, Calpine generates electricity in a reliable and environmentally responsible manner for the customers and communities it serves. Please visit www.calpine.com for more information.

CONTACT: Calpine Corporation, Houston 
Media Relations:
Mel Scott, 713-570-4553
scottm@calpine.com
or
Investor Relations:
Andre K. Walker, 713-830-8775
andrew@calpine.com

SOURCE: Calpine Corporation