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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
916457	Calpine Corp	CPN	Electric Services (4911)	770212977

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1427471	Lsp Cal Holdings I, Llc	1700 Broadway, 38Th Floor New York NY 10019		No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
$0.001 Par Value Common Stock	Disposition	2013-04-16	10,000,000	$20.96	15,460,255	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct

Footnotes

LS Power Equity Partners, L.P. ("LSPEP") is the Managing Member of LSP Cal I. Due to its relationship with LSP Cal I, LSPEP may be deemed to have shared voting and investment power with respect to the shares beneficially owned by LSP Cal I. As such, LSPEP may be deemed to have shared beneficial ownership of the shares of which LSP Cal I is the owner. LSPEP, however, disclaims beneficial ownership of such shares, except to the extent of its pecuniary interest therein.
LS Power Partners I ("Partners I") is the general partner of each of LSPEP and LS Power Equity Partners PIE I,L.P. ("PIE I"). PIE I owns 100% of LSP Cal EB I, Ltd. ("LSP EB I"). LSPEP, PIE I and LSP EB I are together the members of LSP Cal I. Due to its relationship with LSP Cal I, Partners I may be deemed to have direct or indirect pecuniary interest in the Shares owned by LSP Cal I. Partners I, however, disclaims beneficial ownership of such Shares, except to the extent of its pecuniary interest therein. For further details relating to the Reporting Person's ownership structure, please refer to the Schedule 13D filed with the Securities and Exchange Commission on February 11, 2008, last amended on April 18, 2013.