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): February 3, 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, x1168
                                         Investor Relations: Rick Barraza, x1125


        Pre-Arranged Trading Plan Executed on Behalf of Calpine Executive

     (SAN JOSE,  CALIF.)  /PR  Newswire-First  Call/  February 3, 2004 - Calpine
Corporation  [NYSE:CPN] today announced that Chairman,  Chief Executive  Officer
and President Peter Cartwright plans to exercise certain of his Calpine options,
which  otherwise  would expire on September  30, 2004 and December 31, 2004.  On
each exercise date, Mr.  Cartwright will sell only a sufficient amount of option
shares to pay the exercise  price of the options and to cover taxes and fees. He
expects to hold the majority of the exercised  option shares.  Mr.  Cartwright's
transactions  are pursuant to a  pre-arranged  structured  sales plan that is in
accordance  with both the Securities and Exchange  Commission's  Rule 10b5-1 and
Calpine's insider trading policy. The first of these pre-arranged  exercises and
sales occurred on February 2, 2004 and will continue on the 1st and 15th of each
month,  or the next  trading  day if those  dates fall on a weekend or  holiday,
through November 15, 2004.

     As of February 2, 2004,  Mr.  Cartwright  held  11,633,115  total  options,
1,246,560 of which will expire on September  30,  2004,  and  1,429,384 of which
will expire  December 31, 2004. As of December 31, 2003, he owned 691,604 shares
of Calpine stock.

     Pre-arranged   trading  plans  created  under  Rule  10b5-1  allow  company
employees to sell and  purchase a company's  stock  pursuant to a  predetermined
trading program  established by the employee at a time the employee is not aware
of material non-public information. Mr. Cartwright entered into this arrangement
to exercise his expiring  options  during an open trading  window in  accordance
with Calpine's  insider trading  policy.  A third-party  broker  administers Mr.
Cartwright's structured trading plan.

     Calpine  Corporation,  celebrating  its 20th year in power in 2004,  is the
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 was founded in 1984 and 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:  February 3, 2004