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): June 10, 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 7.01 -- REGULATION FD DISCLOSURE

On June 10, 2005, the  Registrant  issued the press release  attached  hereto as
Exhibit 99.1.

On June 15, 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 June 10, 2005.
     99.2. Press release, dated June 15, 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: June 15, 2005






EXHIBIT 99.1.


NEWS RELEASE                                              CONTACTS: 408-995-5115
                                    Media Relations: Katherine Potter, Ext. 1168
                                     Investor Relations: Karen Bunton, Ext. 1121

    Calpine Announces Termination of Offer to Purchase Calpine Canada Energy
           Finance ULC and Calpine Canada Energy Finance II ULC Notes

     (SAN  JOSE,  Calif.),  /PR  Newswire-First  Call/  June 10,  2005 - Calpine
Corporation  [NYSE:  CPN]  announced  today that due to market  conditions it is
terminating  its pending  tender offer for aggregate cash  consideration  not to
exceed  $160,000,000  for all or a portion of the  outstanding  euro-denominated
8-3/8% Senior Notes due 2008 and British-pound  denominated  8-7/8% Senior Notes
due 2011 issued by its indirect,  wholly-owned  subsidiary Calpine Canada Energy
Finance II ULC,  and the U.S.  dollar-denominated  8-1/2%  Senior Notes due 2008
issued by its indirect,  wholly-owned  subsidiary  Calpine Canada Energy Finance
ULC (collectively, the "Notes"). The tender offer had been set to expire at 5:00
p.m., New York City time on Wednesday, June 22, 2005.

     Calpine is not accepting for payment any Notes that have been tendered, and
any tendered Notes will be returned  promptly,  without expense,  to the Holders
who have  tendered  such Notes (or, in the case of Notes  tendered by book-entry
transfer,  will be credited to the account  maintained at The  Depository  Trust
Company,  Euroclear  Bank  S.A./N.V.,  as operator of the Euroclear  System,  or
Clearstream Banking,  societe anonyme, as applicable).  Accordingly,  the tender
payment  (including the early tender premium) will not be paid or become payable
with respect to the Notes.

     Questions concerning the termination of the tender offer may be directed to
the Dealer  Manager for the tender offer,  Credit Suisse First Boston LLC, Attn:
Liability  Management  Desk at  (800)  820-1653  or by  calling  (212)  325-7596
collect.  Questions  may also be  addressed  to MacKenzie  Partners,  Inc.,  the
Information Agent, at (800) 322-2885 or by calling (212) 929-5500 collect.

     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 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
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.







EXHIBIT 99.2.


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


       Calpine's CFO Provides Strategic Initiative Update at Deutsche Bank
                     Tenth Annual Electric Power Conference

     (SAN JOSE, Calif.) /PR Newswire - First Call/ June 15, 2005 - This morning,
at the Deutsche Bank Tenth Annual Electric Power Conference in New York, Calpine
Corporation  [NYSE:CPN] Executive Vice President and Chief Financial Officer Bob
Kelly  provided  an  update  on  the  company's  recently  announced   strategic
initiative.  A copy of the web cast and  presentation are available on Calpine's
web  site,   www.calpine.com,   under  Investor  Relations.  The  web  cast  and
presentation will be available for 30 days.

     On May 25, 2005, at its Annual Meeting of Stockholders, Calpine unveiled an
aggressive  program  designed to  accelerate  the  reduction of debt and to best
capture   the  strong  cash  flow  and   earnings   potential   from   Calpine's
28,000-megawatt power plant fleet. During his presentation today, Kelly provided
an update on several components of Calpine's newly launched program.

2005 Debt Reduction Target

     A major focus of Calpine's  strategic program is the accelerated  reduction
of $3 billion  of the  company's  total  debt by the end of 2005.  Over the past
several weeks,  the company has announced  several  transactions,  including the
asset sales described below,  that will further Calpine's ability to repay debt.
As a result of these transactions,  the company has already identified almost $3
billion  of debt that it expects  will be repaid by the end of 2005.  Kelly also
highlighted that a number of these debt repurchases  could target Calpine's 2008
bonds, significantly reducing the company's $2 billion of maturities in 2008.

Asset Sales

     The emphasis of Calpine's  strategic program is to focus on and to optimize
the value of its core North American power plant portfolio. In doing so, Calpine
put in place a program to sell non-strategic assets, concentrating its focus and
earnings  potential on those markets  where it has a larger market share.  Since
May 25, the company has already announced several pending transactions including
the $925 million sale of its 1,200-megawatt  Saltend Energy Centre in the United
Kingdom,  the potential  sale of the company's  remaining gas reserves,  and the
sale of four  gas-fired  power  plants  totaling  847  megawatts of capacity for
approximately $357 million, or $421 per kilowatt.

     As asset sales are  completed,  net proceeds will be used to reduce debt as
permitted by the company's existing bond indentures.

Calpine Energy Services Joint Venture

     Calpine  Energy  Services  (CES)  is  continuing  its  negotiations  with a
leading,  investment-grade  financial institution to form a partnership that the
company  expects will lower its collateral  requirements,  historically  ranging
from $300-$500  million,  and establish a significant third party customer base.
Combining CES' capabilities with the credit and financial  resources of a strong
financial  institution  will enable the partnership to provide  customers across
the energy industry with unique products, services and energy solutions.

Reducing Operating Costs

     Calpine is advancing  its program to enhance  power plant  performance  and
reduce operating costs by more than $200 million per year.

     As previously announced,  the company continues negotiations to restructure
its  remaining  long-term  service  agreements,  which will allow the company to
self-perform  major plant and turbine  maintenance at considerable cost savings.
Kelly added that Calpine is  currently  looking at reducing  off-peak  operating
losses  through  several  operational  and  technological   initiatives.   These
enhancements  will also lower the  overall  power  portfolio  heat  rate,  which
Calpine  expects could reduce its annual fuel bill by as much as $230 million in
2007.

     These and other  power  plant  enhancement  programs  are also  expected to
increase power production by as much as 2,300 megawatts by the end of 2007.

About Calpine

     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 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
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 as, but not
limited to, (i) the timing and extent of  deregulation of energy markets and the
rules and regulations adopted on a transitional basis with respect thereto; (ii)
the timing and extent of changes in  commodity  prices for energy,  particularly
natural gas and electricity;  (iii) commercial operations of new plants that may
be delayed or prevented because of various  development and construction  risks,
such as a failure  to obtain  the  necessary  permits  to  operate,  failure  of
third-party  contractors to perform their contractual  obligations or failure to
obtain  financing on acceptable  terms;  (iv)  unscheduled  outages of operating
plants; (v) a competitor's  development of lower cost generating gas-fired power
plants; (vi) risks associated with marketing and selling power from power plants
in the newly-competitive  energy market; (vii) the successful exploitation of an
oil or gas resource  that  ultimately  depends upon the geology of the resource,
the total  amount  and costs to  develop  recoverable  reserves  and  operations
factors  relating to the  extraction  of natural gas;  (viii) the effects on the
company's  business  resulting  from reduced  liquidity in the trading and power
industry;  (ix) the  company's  ability to access the capital  markets or obtain
bank financing on attractive  terms;  (x) the direct or indirect  effects on the
company's business of a lowering of its credit rating (or actions it may take in
response to changing credit rating criteria),  including,  increased  collateral
requirements,  refusal by the company's  current or potential  counterparties to
enter into transactions with it and its inability to obtain credit or capital in
desired  amounts or on favorable  terms;  and (xi) other 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 Dec.  31,  2004,  and its  Quarterly  Report on Form 10-Q for the
quarter ended March 31, 2005,  which can also 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.