UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 26, 2004 CALPINE CORPORATION (A Delaware Corporation) Commission File Number: 001-12079 I.R.S. Employer Identification No. 77-0212977 50 West San Fernando Street San Jose, California 95113 Telephone: (408) 995-5115 ITEM 5. OTHER EVENTS NEWS RELEASE CONTACTS: 408-995-5115 Media Relations: Katherine Potter, Ext. 1168 Investor Relations: Karen Bunton, Ext. 1121 Calpine Successfully Completes Consent Solicitation SAN JOSE, Calif. /PRNewswire-FirstCall/ April 26, 2004 -- Calpine Corporation (NYSE: CPN) has successfully completed its previously announced consent solicitation to effect certain amendments to the Indentures governing the following outstanding Calpine public debt securities: o 10-1/2% Senior Notes due 2006 (CUSIP 131347-AD-8) o 8-3/4% Senior Notes due 2007 (CUSIP 131347-AF-3) o 7-7/8% Senior Notes due 2008 (CUSIP 131347-AJ-5) o 7-5/8% Senior Notes due 2006 (CUSIP 131347-AL-0) o 7-3/4% Senior Notes due 2009 (CUSIP 131347-AM-8) The Indentures govern the Senior Notes issued by Calpine between 1996 and 1999. The purpose of the amendments is to conform certain of the covenants in these Indentures to comparable provisions in the Indentures and other financing instruments governing the nonconvertible debt issued by Calpine in 2003. Goldman, Sachs & Co. acted as the exclusive Solicitation Agent for the consent solicitation, and Bondholder Communications Group served as Information Agent. Calpine Corporation, celebrating its 20th year in power in 2004, is a leading North American power company dedicated to providing electric power to wholesale and industrial customers from clean, efficient, natural gas-fired and geothermal power facilities. The company generates power at plants it owns or leases in 21 states in the United States, three provinces in Canada and in the United Kingdom. The company is publicly traded on the New York Stock Exchange under the symbol CPN. For more information about Calpine, visit www.calpine.com. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. CALPINE CORPORATION By: /s/ Charles B. Clark, Jr. Charles B. Clark, Jr. Senior Vice President and Controller Chief Accounting Officer Date: April 28, 2004