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): July 7, 2005


                               CALPINE CORPORATION
             (Exact name of registrant as specified in its charter)

                                    Delaware
                 (State of Other Jurisdiction of Incorporation)

                        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
         (Address of principal executive offices and telephone number)

     Check the  appropriate  box below if the Form 8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)

     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
          (17 CFR 240.14a-12)

     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))

     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))




ITEM 8.01 -- OTHER EVENTS

     On July 7, 2005, the Registrant issued the press release attached hereto as
Exhibit 99.1.

     On July 12, 2005, the Registrant  issued the press release  attached hereto
as Exhibit 99.2.


ITEM 9.01 -- FINANCIAL STATEMENTS AND EXHIBITS

(a)  Financial Statements of Businesses Acquired.

     Not  Applicable

(b)  Pro Forma Financial Information.

     Not  Applicable

(c)  Exhibits.

     99.1. Press release, dated July 7, 2005.
     99.2. Press release, dated July 12, 2005.






                                   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, Controller and
                                       Chief Accounting Officer


Date: July 12, 2005




EXHIBIT 99.1

NEWS RELEASE                                            CONTACTS: (408) 995-5115
                                    Media Relations:  Bill Highlander, Ext. 1244
                                    Investor Relations:  Karen Bunton, Ext. 1121



     CCFC Announces Offer to Purchase for Cash a Portion of its Outstanding
       9 3/4% Second Priority Senior Secured Floating Rate Notes due 2011


     (SAN  JOSE,  Calif.)  /PR  Newswire  - First  Call/  July 7, 2005 - Calpine
Corporation  [NYSE:  CPN]  today  announced  that its wholly  owned  subsidiary,
Calpine  Construction Finance Company,  L.P. ("CCFC"),  commenced a tender offer
(the  "Offer")  on July 6, 2005 for a portion of its  outstanding  9 3/4% Second
Priority Senior Secured Floating Rate Notes due 2011 (the "Notes"). The Offer is
to purchase the Notes at par plus accrued interest to and including the Purchase
Date.  The "Purchase  Date" is the date,  not later than the third  business day
following the Expiration  Date, on which CCFC accepts for purchase,  pursuant to
the terms and conditions of the Offer,  Notes validly  tendered (and not validly
withdrawn) in the Offer.  Notes accepted for purchase,  if any,  pursuant to the
Offer will be paid for using the net proceeds from CCFC's  previously  announced
potential sale of the Ontelaunee Energy Center. These net proceeds are currently
anticipated to be approximately $225 million.

     Pursuant  to the  terms  of the  Indenture  governing  the  Notes,  CCFC is
required  to offer to purchase  Notes with net  proceeds of any asset sale after
first offering to repay indebtedness  outstanding under its Credit and Guarantee
Agreement (the "Term Loans").  Currently,  Term Loans in an aggregate  principal
amount of approximately $379.2 million are outstanding. Therefore, the amount of
Notes that CCFC is offering to purchase  under the Offer is the amount,  if any,
of net proceeds remaining after satisfaction of its obligation to offer to repay
the Term Loans with the proceeds of the  Ontelaunee  divestiture.  If holders of
Term Loans in an  aggregate  principal  amount  that  equals or exceeds  the net
proceeds  from the  Ontelaunee  divestiture  accept  CCFC's offer to repay those
loans, no Notes will be purchased under the Offer.

     The Offer is scheduled to expire at 12:00 midnight,  New York City time, on
August 3, 2005, unless extended or earlier  terminated (the "Expiration  Date").
Tendered  Notes may be withdrawn at any time prior to 12:00  midnight,  New York
City Time, on the Expiration Date.

     The Offer is subject to customary conditions, including the consummation of
the  Ontelaunee  divestiture  and the  availability  of net  proceeds  from that
divestiture to repurchase  Notes  pursuant to the Offer after  repayment of Term
Loans.

     This press  release is not an offer to  purchase  or a  solicitation  of an
offer to sell any securities,  which is being made only pursuant to the Offer to
Purchase,  dated July 6, 2005.  CCFC has retained  Wilmington  Trust  Company as
Depositary  for the Tender  Offer.  The means to tender Notes may be obtained by
requesting the Offer to Purchase,  the Letter of Transmittal and other documents
from  Wilmington  Trust at (302)  636-6470 or in writing at Rodney Square North,
1100 North Market Street,  Wilmington,  Delaware 19890-0001.  CCFC does not make
any  recommendation  as to whether or not holders of Notes  should  tender their
Notes pursuant to the Offer.  Holders must make their own decision as to whether
to tender  their  Notes,  and if  tendering,  the  principal  amount of Notes to
tender.

     Calpine  Construction  Finance  Company,  L.P. is an indirect  wholly owned
subsidiary  of Calpine  Corporation.  CCFC  currently  owns and  operates  seven
natural gas-fired combined cycle power plants located in six states with a total
peak generating capacity of over 4,200 megawatts.

     This  news  release  discusses  certain  matters  that  may  be  considered
"forward-looking" statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as  amended,  including  statements  regarding  the  intent,  belief or  current
expectations  of CCFC and its  management.  Prospective  investors are cautioned
that  any  such   forward-looking   statements  are  not  guarantees  of  future
performance  and  involve  a  number  of  risks  and  uncertainties  that  could
materially  affect actual results.  Such risks include,  but are not limited to,
those risks  identified from  time-to-time in CCFC's reports provided to holders
of its Notes, including the risk factors identified therein. All information set
forth in this news release is as of today's date, and CCFC undertakes no duty to
update this information.



EXHIBIT 99.2.


NEWS RELEASE                                            CONTACTS: (408) 995-5115
                                   Media Relations:  Katherine Potter, Ext. 1168
                                    Investor Relations:  Rick Barraza, Ext. 1125


     Calpine Announces Results of its Offer to Purchase for Cash Any and All
          Outstanding 9 5/8% First Priority Senior Secured Notes due 2014

     (SAN  JOSE,  Calif.)  /PR  Newswire - First  Call/ July 12,  2005 - Calpine
Corporation  [NYSE:  CPN]  announced  today  that it has  accepted  for  payment
$138,895,000 aggregate principal amount of its outstanding 9 5/8% First Priority
Senior  Secured Notes due 2014 (the "Notes") under the terms of the tender offer
(the  "Offer")  commenced  June 9, 2005 to purchase  for cash any and all of the
outstanding Notes. Payment for the Notes accepted for purchase and return of all
other Notes  tendered and not accepted for purchase will be carried out promptly
by the tender agent.  With  completion of the tender offer,  the Company now has
approximately $646,105,000 aggregate principal amount of Notes outstanding.

     The Company  recently  completed the  disposition of its remaining U.S. gas
assets  (the  "Gas  Divestiture").  The  consummation  of  the  Gas  Divestiture
qualifies as an "Asset Sale" under the Indenture, dated as of September 30, 2004
(the "Indenture"), between the Company and Wilmington Trust Company, as Trustee,
pursuant  to which the Notes  were  issued.  Accordingly,  the Offer was made in
compliance  with the  Indenture's  requirements  applicable to  repurchases  and
repayment  of the Notes  using the  proceeds  of "Asset  Sales"  such as the Gas
Divestiture.

     For questions and  information  about the tender offer,  please contact the
information agent, MacKenzie Partners, Inc., toll free at (877) 278-6310.

     A  major  power  company,   Calpine  Corporation   supplies  customers  and
communities  with  electricity  from clean,  efficient,  natural  gas-fired  and
geothermal power plants. Calpine owns, leases and operates integrated systems of
plants in 21 U.S.  states,  three Canadian  provinces and in the United Kingdom.
Its customized  products and services include wholesale and retail  electricity,
natural gas, gas turbine components and services, energy management,  and a wide
range of power plant engineering,  construction and operations services. Calpine
was founded in 1984. It is included in the S&P 500 Index and is publicly  traded
on the New York Stock Exchange under the symbol CPN. For more information, visit
http://www.calpine.com.

     This  news  release  discusses  certain  matters  that  may  be  considered
"forward-looking" statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as  amended,  including  statements  regarding  the  intent,  belief or  current
expectations  of  Calpine   Corporation  ("the  Company")  and  its  management.
Prospective investors are cautioned that any such forward-looking statements are
not  guarantees  of  future  performance  and  involve  a number  of  risks  and
uncertainties  that could materially affect actual results.  Such risks include,
but  are not  limited  to,  those  risks  identified  from  time-to-time  in the
Company's reports and registration  statements filed with the SEC, including the
risk  factors  identified  in its Annual  Report on Form 10-K for the year ended
December 31, 2004 and in its Quarterly Report on Form 10-Q for the quarter ended
March 31, 2005, which can be found on the Company's website at  www.calpine.com.
All  information  set forth in this news release is as of today's date,  and the
Company undertakes no duty to update this information.