UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant To Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.    )

Filed by the Registrant  x                            Filed by a Party other than the Registrant  ¨

Check the appropriate box:

¨	Preliminary Proxy Statement
¨	Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2))
¨	Definitive Proxy Statement
x	Definitive Additional materials
¨	Soliciting Material under Rule 14a-12
CALPINE CORPORATION
(Name of Registrant as Specified in Charter)
Not applicable
(Name of Person(s) Filing Proxy Statement, if Other than the Registrant)
Payment of filing fee (Check the appropriate box):
x	No fee required.
¨	Fee computed on the table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	(1)	Title of each class of securities to which transaction applies:
	(2)	Aggregate number of securities to which transaction applies:
	(3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11:
	(4)	Proposed maximum aggregate value of transaction:
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¨	Fee paid previously with preliminary materials.
¨	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
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	(2)	Form, Schedule or Registration Statement No.:
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	(4)	Date Filed:

*** Exercise Your Right to Vote ***

IMPORTANT NOTICE Regarding the Availability of Proxy Materials

for the Shareholder Meeting to Be Held on May 11, 2011

CALPINE CORPORATION

CALPINE CORPORATION

717 TEXAS AVENUE

SUITE 1000

HOUSTON, TX 77002

Meeting Information
Meeting Type:	Annual Meeting
For holders as of:	March 14, 2011

Date:         May 11, 2011        Time: 10:00 AM CDT
Location:	Magnolia Hotel 1100 Texas Avenue Houston, Texas 77002

You are receiving this communication because you hold shares in Calpine Corporation.

This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.

— Before You Vote — How to Access the Proxy Materials
Proxy Materials Available to VIEW or RECEIVE:
NOTICE OF ANNUAL MEETING OF SHAREHOLDERS            PROXY STATEMENT            2010 ANNUAL REPORT
How to View Online:
Have the information that is printed in the box marked by the arrowg (located on the following page) available and visit: www.proxyvote.com.
How to Request and Receive a PAPER or E-MAIL Copy:
If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:
	1) BY INTERNET:	www.proxyvote.com
	2) BY TELEPHONE:	1-800-579-1639
	3) BY E-MAIL*:	sendmaterial@proxyvote.com
*  If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrowg (located on the following page) in the subject line.
Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before April 27, 2011 to facilitate timely delivery.
— How To Vote — Please Choose One of the Following Voting Methods
Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.
Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow g (located on the following page) available and follow the instructions.
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

Voting Items
The Board of Directors recommends a vote “FOR” the listed nominees:
1.	Election of Directors
	Nominees:
	01)	Frank Cassidy	06)	Robert A. Mosbacher, Jr.
	02)	Jack A. Fusco	07)	William E. Oberndorf
	03)	Robert C. Hinckley	08)	Denise M. O’Leary
	04)	David C. Merritt	09)	J. Stuart Ryan
	05)	W. Benjamin Moreland
The Board of Directors recommends a vote “FOR” the following proposals:
2.	Ratification of selection of PricewaterhouseCoopers LLP as the Company’s independent registered public accountants for the year ending December 31, 2011.
3.	Approval of advisory resolution on executive compensation.
The Board of Directors recommends a vote for every “1 YEAR” on the following proposal:
4.	Advisory vote on the frequency of future advisory votes on executive compensation.
NOTE: Such other business as may properly come before the meeting or any adjournment thereof.
NOTE: THIS IS NOT A PROXY CARD. YOU CANNOT VOTE BY RETURNING THIS NOTICE. To vote the shares, you must vote online or request a paper copy of the proxy materials to receive a proxy card. If you wish to attend and vote at the meeting, please bring this notice with you.