<SEC-DOCUMENT>0001085256-13-000014.txt : 20130219
<SEC-HEADER>0001085256-13-000014.hdr.sgml : 20130219
<ACCEPTANCE-DATETIME>20130214181250
ACCESSION NUMBER:		0001085256-13-000014
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20130215
DATE AS OF CHANGE:		20130214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CALPINE CORP
		CENTRAL INDEX KEY:			0000916457
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				770212977
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-48317
		FILM NUMBER:		13616737

	BUSINESS ADDRESS:	
		STREET 1:		717 TEXAS AVENUE
		STREET 2:		SUITE 1000
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002
		BUSINESS PHONE:		7138302000

	MAIL ADDRESS:	
		STREET 1:		717 TEXAS AVENUE
		STREET 2:		SUITE 1000
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RS INVESTMENT MANAGEMENT CO LLC
		CENTRAL INDEX KEY:			0001085256
		IRS NUMBER:				943321067

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		388 MARKET STREET
		STREET 2:		SUITE 1700
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		4155912700

	MAIL ADDRESS:	
		STREET 1:		388 MARKET STREET
		STREET 2:		SUITE 1700
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>cpn13g.txt
</DOCUMENT>
</SUBMISSION>