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): May 25, 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 May 25, 2005, the Registrant  issued the press release  attached hereto
as Exhibit 99.1.



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 May 25, 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: May 25, 2005






EXHIBIT 99.1.


NEWS RELEASE                                            CONTACTS: (408) 995-5115
                                   Media Relations:  Katherine Potter, Ext. 1168
                                    Investor Relations:  Rick Barraza, Ext. 1125
                                                         Karen Bunton, Ext. 1121
                                                          Lisa Poelle, Ext. 1285


                    Calpine Launches Strategic Initiative to
                Accelerate Debt Reduction and Increase Cash Flow

           Program Includes Asset Sales and Operating Cost Reductions


     (SAN  JOSE,  Calif.)  /PR  Newswire-First  Call/  May  25,  2005 -  Calpine
Corporation [NYSE:CPN] rolled out an aggressive strategic initiative today aimed
at  dramatically  enhancing the  company's  financial  strength.  The program is
targeting accelerated debt reduction of more than $3 billion by the end of 2005,
$275  million of annual  interest  savings,  and  approximately  $200 million in
annual operating cost reductions.

     The program will  strengthen the company's core North American power assets
and enhance Calpine's financial flexibility by:

o    Optimizing the Power Plant Portfolio - Selling certain power and gas assets
     to reduce debt,  lower annual  interest  cost and  increase  cash flow.  In
     addition to  previously  announced  potential  asset sales,  the company is
     targeting the sale of up to eight plants.

o    Reducing  Operating Costs - Decreasing  operating and maintenance costs and
     lowering fuel costs to improve the operating  performance  of power plants,
     significantly boosting operating cash flow and liquidity.

o    Accelerating  Debt Reduction - Reducing total debt by more than $3 billion,
     or 16%,  by the end of 2005,  one year  earlier  than  planned.  Additional
     significant debt reductions are planned for 2006 and beyond.

     "Calpine  has set an  aggressive  and  timely  program  to  strengthen  our
financial and competitive position," stated Calpine Chairman,  President and CEO
Peter  Cartwright.  "To operate  effectively in a business  environment that has
changed  dramatically  over the last few years,  we are reviewing all options to
provide near-term results, while continuing to focus on long-term value. We have
already  recognized  several  attractive  opportunities,  which we  expect  will
improve our operating cash flow.

     "We are  refocusing  and  streamlining  our  business to take  advantage of
market opportunities as industry and economic  fundamentals  continue to improve
in several of our key power  regions.  By taking these decisive  actions,  we're
positioning  Calpine to best capture the strong cash and  earnings  potential of
our efficient,  gas-fired and  renewable,  geothermal  power fleet.  The program
we're presenting today is in its early stages.  It will serve as a blueprint for
a new and more powerful Calpine," Cartwright concluded.


PROGRAM OVERVIEW

     The program is designed to improve the value of Calpine's  core power plant
assets and strengthen its balance sheet.

Optimizing the Power Plant Portfolio

o    Asset  Sales -  Calpine  is  pursuing  opportunities  to add  value  to its
     portfolio,  reduce  corporate  debt and increase cash flow through sales of
     both its gas assets and certain of its power assets.

     o    Calpine is finalizing  its review of bids received for the sale of its
          1,200-megawatt  Saltend  Energy  Centre  in the  United  Kingdom.  The
          proceeds  generated from such a sale are expected to be used to redeem
          $620 million of  preferred  equity  related to the  project,  with the
          balance to be used in  accordance  with the  company's  existing  bond
          indentures.

     o    As announced last week, Calpine is evaluating  strategic  alternatives
          for its U.S. oil and gas assets,  including the potential  sale of all
          of or a portion of these resources. The proceeds generated from such a
          sale are expected to be used in accordance with the company's existing
          bond indentures.

     o    The  company is also  evaluating  the sale of up to eight  other power
          plants to capture stronger market valuations.

o    Mothball  Plants - Calpine is considering  temporarily  shutting down power
     plants with negative cash flow, until market  conditions  warrant start-up,
     to further reduce costs and more effectively focus the company's  financial
     and sales resources.

o    Credit Enhancement - The company is in discussions with a leading financial
     institution   to  form  a  partnership   that  will  lower  its  collateral
     requirements and establish a significant third party customer business. The
     combination of Calpine Energy Services' people, systems and processes,  and
     the  credit  and  financial  resources  of an  investment  grade  financial
     institution,  will enable the partnership to provide  customers  across the
     energy industry with unique products, services and energy solutions.

Reducing Operating Costs

     Through technological innovations and other programs,  Calpine is enhancing
the operating  performance of its power plant fleet and is working to reduce its
operating costs by approximately $200 million per year:

o    Self-Perform  Maintenance  - Calpine is in  negotiations  to terminate  all
     remaining long-term maintenance  agreements.  This will allow the company's
     plant and  turbine  maintenance  groups to provide  major  maintenance  and
     component and parts repairs at considerable cost savings.

o    Reduce Off-Peak Operating Losses - Calpine plans to incorporate  fleet-wide
     initiatives,  some  of  which  include  innovative  components  that it has
     developed to reduce off-peak  operating  losses,  resulting in considerable
     fuel  cost  savings.   Further   promoting   this  effort,   the  company's
     manufacturing and parts components subsidiary,  Power Systems Manufacturing
     (PSM),  recently  installed  its new  combustor  system,  Flamesheet,  at a
     Calpine  plant to increase the  operating  range of the gas turbines  while
     meeting the environmental permitting requirements.

o    Reduce Heat Rate - Calpine will  continue to  incorporate  fuel  efficiency
     technologies  fleet-wide  to lower its annual fuel costs.  To capture these
     cost  savings,  Calpine is  targeting  up to a 4%  reduction  in fuel costs
     through incremental improvements in power plant heat rates. For example, at
     Calpine's  263-megawatt Rumford Power Plant, the company recently installed
     and tested PSM proprietary parts and low-emissions  systems, and customized
     plant operating  procedures,  resulting in a 2% heat rate  improvement that
     could provide annual savings approaching $1 million at the plant.

Accelerating Debt Reduction

     Through  this  program of asset  sales,  credit  enhancement,  and fuel and
operating  cost  reductions,  Calpine is  accelerating  by one year its plans to
repurchase  more than $3  billion  of  corporate  debt by the end of 2005.  This
aggressive debt reduction program will continue in 2006 and beyond.

     Calpine Chief Financial Officer Bob Kelly stated, "Our number one financial
priority is  de-levering  the balance sheet to bring it in line with the current
and future power markets and the related spark  spread-generating  capability of
our modern fleet.  This program is the first step toward achieving our long-term
target of total debt equal to six times  EBITDA,  as  adjusted(1).  With the new
financial focus and power initiative  outlined today, we expect to significantly
strengthen our balance sheet, lower our annual interest payments and improve our
debt coverage ratios."

Company to Host Investor Day

     Calpine  will  host an East  Coast  Investor  Day in the Fall to  provide a
comprehensive  overview  of the  company,  including  a  progress  report on the
strategic  initiatives  announced  today.  Further  information  on the date and
location of the event will be announced shortly.

Annual Meeting Web Cast

     Calpine will present a web cast of its Annual Meeting of Stockholders  this
morning,  at 10:00 a.m. PDT. Peter Cartwright will provide a presentation on the
program outlined in today's announcement and a review of the past 12-months. The
web cast,  which includes the normal business meeting and  presentation,  can be
accessed at Calpine's web site,  www.calpine.com,  under Investor  Relations and
will be archived for 30 days.

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.

- -------------------

     (1) For the  company,  EBITDA is not a measure of  operating  results,  but
rather a measure of its ability to service debt and to raise  additional  funds.
It  should  not be  construed  as an  alternative  to  either  (i)  income  from
operations or (ii) cash flows from  operating  activities.  It is defined as net
income less income from  unconsolidated  investments,  plus cash  received  from
unconsolidated  investments;  plus  provision  for tax;  plus  interest  expense
(including   distributions  on  trust  preferred  securities  and  one-third  of
operating  lease  expense,  which is  management's  estimate of the component of
operating lease expense that constitutes  interest expense);  plus depreciation,
depletion and amortization. The interest, tax, and depreciation and amortization
components of discontinued  operations are added back in calculating  EBITDA, as
adjusted.  The  non-GAAP  measure,  EBITDA,  as adjusted  for non-cash and other
charges, is presented as a further refinement of EBITDA, as adjusted, to reflect
the company's ability to service debt with cash.

     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.