SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D/A

Under the Securities Exchange Act of 1934

(Amendment No. 11)*

Calpine Corporation

(Name of Issuer)

Common Shares, par value $0.001 per share

(Title of Class of Securities)

131347304

(CUSIP Number)

James J. Moloney

Gibson, Dunn & Crutcher LLP

3161 Michelson Drive

Irvine, CA 92612

(949) 451-4343

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

April 8, 2015

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240.13d-7 for other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

13D/A
CUSIP No. 131347304	Page 2 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). LUMINUS MANAGEMENT, LLC
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) IA

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

13D/A
CUSIP No. 131347304	Page 3 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). LUMINUS ENERGY PARTNERS MASTER FUND, LTD.
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) OO

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

13D/A
CUSIP No. 131347304	Page 4 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). LUMINUS SPECIAL OPPORTUNITIES I ONSHORE, L.P.
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) PN

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 5 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). LUMINUS SPECIAL OPPORTUNITIES I PIE MASTER, L.P.
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization CAYMAN ISLANDS
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) PN

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 6 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). LS POWER PARTNERS II, L.P.
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) PN

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 7 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). LSP CAL HOLDINGS II, LLC
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) OO

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 8 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). VEGA ENERGY GP, LLC
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) OO

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 9 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). VEGA ASSET PARTNERS, LP (formerly known as LUMINUS ASSET PARTNERS, LP)
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) PN

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 10 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). FARRINGTON MANAGEMENT, LLC
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) OO

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 11 of 20 Pages

1	Name of reporting persons. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). FARRINGTON CAPITAL, L.P.
2	Check the appropriate box if a member of a group (see instructions) (a)  x        (b)  ¨
3	SEC use only
4	Source of funds (see instructions) WC
5	Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)  ¨
6	Citizenship or place of organization DELAWARE
Number of   shares   beneficially   owned by   each   reporting   person   with		7	Sole voting power   0
		8	Shared voting power   24,749,530
		9	Sole dispositive power   0
		10	Shared dispositive power   24,749,530
11	Aggregate amount beneficially owned by each reporting person 24,749,530
12	Check if the aggregate amount in Row (11) excludes certain shares (see instructions)  ¨
13	Percent of class represented by amount in Row (11) 6.6%*
14	Type of reporting person (see instructions) PN

* Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

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CUSIP No. 131347304	Page 12 of 20 Pages

This Amendment No. 11 (this “Amendment”) amends and supplements the Schedule 13D filed on February 11, 2008 (the “Original Filing”) by the Reporting Persons relating to the Common Stock, par value $0.001 per share (“Shares”) of Calpine Corporation, a Delaware corporation (the “Issuer”). Information reported in the Original Filing remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment or Amendment Numbers 1 through 10. Capitalized terms used but not defined in this Amendment have the respective meanings set forth in the Original Filing.

Item 2. Identity and Background.

Item 2 of the Original Filing, as amended, is hereby amended and supplemented to add the following paragraphs at the end thereof:

This Schedule 13D is being filed by Luminus Management, LLC (“Luminus Management”), LSP Cal Holdings II, LLC (“LSP Cal II”), LS Power Partners II, L.P. (“Partners II”), Luminus Energy Partners Master Fund, Ltd. (“Luminus Energy Fund”), Vega Energy GP, LLC (“Vega Energy”), Vega Asset Partners, L.P. (“Vega Asset Partners”), Farrington Capital, L.P. (“Farrington”), Farrington Management, LLC (“Farrington Management”), Luminus Special Opportunities I Onshore, L.P. (“Luminus I Onshore”), and Luminus Special Opportunities I PIE Master, L.P. (“Luminus I PIE Master”) pursuant to their agreement to the joint filing of this Schedule 13D (the “Fourth Amended and Restated Joint Filing Agreement,” attached hereto as Exhibit 7.1).

LSP Cal II, Partners I, Partners II, Farrington and Farrington Management are together referred to herein as the “LS Power Entities,” and Luminus Management, Luminus Energy Fund, Luminus I Onshore, and Luminus I PIE Master are together referred to herein as the “Luminus Entities.” The LS Power Entities, the Luminus Entities, Vega Energy, and Vega Asset Partners are together referred to herein as the “Reporting Persons,” and each of them are individually referred to herein as a “Reporting Person.”

Jonathan Barrett directly (whether through ownership interest or position) may be deemed to control the Luminus Entities and have shared voting and investment power with respect to the Shares owned by Luminus Energy Fund, Luminus I Onshore, and Luminus I PIE Master. As such, Mr. Barrett may be deemed to have shared beneficial ownership of the Shares owned by Luminus Energy Fund, Luminus I Onshore, and Luminus I PIE Master. Mr. Barrett, however, disclaims beneficial ownership of such Shares. Mr. Barrett’s current principal occupation is president and manager of Luminus Management.

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CUSIP No. 131347304	Page 13 of 20 Pages

Item 4. Purpose of Transaction.

Item 4 of the Original Filing, as amended, is hereby amended and supplemented to add the following paragraph at the end thereof:

The Reporting Persons have sold Shares in order to better align the size of their investment in the Issuer within their portfolio of investments. From time to time, the Reporting Persons may make additional purchases or sales of the Shares.

Item 5. Interest in Securities of the Issuer.

Items 5(a), (b) and (c) of the Original Filing are hereby amended by adding the following at the end thereof:

(a) As of April 9, 2015, Luminus Energy Fund is the record owner of 2,996,508 Shares, representing approximately 0.8% of the outstanding Shares. Luminus I Onshore is the record owner of 391,231 Shares, representing approximately 0.1% of the outstanding Shares. Luminus I PIE Master is the record owner of 662,335 Shares, representing approximately 0.18% of the outstanding Shares. Farrington is the record owner of 116,350 Shares, representing approximately 0.03% of the outstanding Shares. LSP Cal II is the record owner of 18,443,356 Shares, representing approximately 4.9% of the outstanding Shares. Vega Asset Partners is the record owner of 2,139,750 Shares, representing approximately 0.57% of the outstanding Shares.

(b)

Reporting Persons*	Number of Shares With Sole Voting and Dispositive Power		Number of Shares With Shared Voting and Dispositive Power		Aggregate Number of Shares Beneficially Owned		Percentage of Class Beneficially Owned **
Luminus Management, LLC		0		24,749,530		24,749,530		6.6	%
Luminus Energy Partners Master Fund, Ltd.		0		24,749,530		24,749,530		6.6	%
Luminus Special Opportunities I Onshore, L.P.		0		24,749,530		24,749,530		6.6	%
Luminus Special Opportunities I PIE Master, L.P.		0		24,749,530		24,749,530		6.6	%
LS Power Partners II, L.P.		0		24,749,530		24,749,530		6.6	%
LSP Cal Holdings II, LLC		0		24,749,530		24,749,530		6.6	%
Vega Energy GP, LLC		0		24,749,530		24,749,530		6.6	%
Vega Asset Partners, LP		0		24,749,530		24,749,530		6.6	%
Farrington Management, LLC		0		24,749,530		24,749,530		6.6	%
Farrington Capital, L.P.		0		24,749,530		24,749,530		6.6	%

* Luminus Investment Partners Master Fund, L.P. is no longer a Reporting Person and is not included on this Schedule 13D.

** Based on 375,312,062 shares of common stock outstanding as of March 16, 2015 reported in the Schedule 14A filed by the Issuer with the Securities and Exchange Commission on March 31, 2015.

(c) All transactions in the Shares affected during the past 60 days by the Reporting Persons are set forth in Annex A, attached to this Schedule 13D and incorporated herein by reference.

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CUSIP No. 131347304	Page 14 of 20 Pages

Item 7. Material To Be Filed As Exhibits.

Item 7 of the Original Filing, as amended, is hereby amended by adding the following at the end thereof:

Exhibit No.	Description
7.1	Fourth Amended and Restated Joint Filing Agreement, dated April 10, 2015.

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CUSIP No. 131347304	Page 15 of 20 Pages

SIGNATURES

After reasonable inquiry and to the best of their knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated: April 10, 2015

Luminus Management, LLC
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President
Luminus Energy Partners Master Fund, Ltd.
By:	Luminus Management, LLC
Its:	Investment Manager
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President
Luminus Special Opportunities I Onshore, L.P.
By:	Luminus Management, LLC
Its:	Investment Manager
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President
Luminus Special Opportunities I PIE Master, L.P.
By:	Luminus Management, LLC
Its:	Investment Manager
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President

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CUSIP No. 131347304	Page 16 of 20 Pages

LS Power Partners II, L.P.
By:	/s/ Darpan Kapadia
Name:	Darpan Kapadia
Title:	Managing Director
LSP Cal Holdings II, LLC
By:	/s/ Darpan Kapadia
Name:	Darpan Kapadia
Title:	Executive Vice President
Vega Energy GP, LLC
By:	/s/ Paul Segal
Name:	Paul Segal
Title:	President
Vega Asset Partners, LP
By:	Vega Energy GP, LLC
Its:	General Partner
By:	/s/ Paul Segal
Name:	Paul Segal
Title:	President
Farrington Management, LLC
By:	/s/ Mikhail Segal
Name:	Mikhail Segal
Title:	Vice President
Farrington Capital, L.P.
By:	Farrington Management, LLC
Its:	General Partner
By:	/s/ Mikhail Segal
Name:	Mikhail Segal
Title:	Vice President

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CUSIP No. 131347304	Page 17 of 20 Pages

ANNEX A TO SCHEDULE 13D

PARTY EFFECTING TRANSACTION	DATE		BUY /SELL	QUANTITY		AVERAGE PRICE ($)*		CURRENCY
LSP Cal Holdings II, LLC		3/18/2015	SELL		100,000		22.36		USD
LSP Cal Holdings II, LLC		3/19/2015	SELL		28,200		22.19		USD
LSP Cal Holdings II, LLC		3/23/2015	SELL		46,800		22.08		USD
LSP Cal Holdings II, LLC		3/30/2015	SELL		150,000		22.44		USD
LSP Cal Holdings II, LLC		3/31/2015	SELL		150,000		22.58		USD
LSP Cal Holdings II, LLC		4/01/2015	SELL		100,000		22.14		USD
LSP Cal Holdings II, LLC		4/02/2015	SELL		200,000		22.69		USD
LSP Cal Holdings II, LLC		4/06/2015	SELL		200,000		23.13		USD
LSP Cal Holdings II, LLC		4/07/2015	SELL		200,000		23.23		USD
LSP Cal Holdings II, LLC		4/08/2015	SELL		200,000		23.15		USD
LSP Cal Holdings II, LLC		4/09/2015	SELL		200,000		22.96		USD
Luminus Energy Partners Master Fund, Ltd.		2/09/2015	SELL		112,500		21.76		USD
Luminus Energy Partners Master Fund, Ltd.		2/11/2015	SELL		192,500		21.78		USD
Luminus Energy Partners Master Fund, Ltd.		2/13/2015	BUY		351,400		20.95		USD
Luminus Energy Partners Master Fund, Ltd.		2/13/2015	SELL		137,434		21.40		USD
Luminus Energy Partners Master Fund, Ltd.		2/17/2015	BUY		54,156		21.08		USD
Luminus Energy Partners Master Fund, Ltd.		2/18/2015	SELL		276,900		21.78		USD
Luminus Energy Partners Master Fund, Ltd.		2/19/2015	SELL		54,600		21.81		USD
Luminus Energy Partners Master Fund, Ltd.		2/20/2015	SELL		112,500		21.95		USD
Luminus Energy Partners Master Fund, Ltd.		2/24/2015	SELL		225,000		22.15		USD
Luminus Energy Partners Master Fund, Ltd.		2/27/2015	BUY		112,500		21.17		USD
Luminus Energy Partners Master Fund, Ltd.		3/02/2015	BUY		300,000		20.71		USD
Luminus Energy Partners Master Fund, Ltd.		3/03/2015	SELL		2,200		21.00		USD
Luminus Energy Partners Master Fund, Ltd.		3/04/2015	SELL		112,400		20.86		USD

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CUSIP No. 131347304	Page 18 of 20 Pages

PARTY EFFECTING TRANSACTION	DATE		BUY /SELL	QUANTITY		AVERAGE PRICE ($)*		CURRENCY
Luminus Energy Partners Master Fund, Ltd.		3/05/2015	SELL		112,400		21.10		USD
Luminus Energy Partners Master Fund, Ltd.		3/10/2015	SELL		112,400		20.61		USD
Luminus Energy Partners Master Fund, Ltd.		3/17/2015	SELL		75,000		21.59		USD
Luminus Energy Partners Master Fund, Ltd.		3/18/2015	SELL		246,500		22.14		USD
Luminus Energy Partners Master Fund, Ltd.		3/27/2015	SELL		636,900		21.78		USD
Luminus Energy Partners Master Fund, Ltd.		3/30/2015	SELL		187,400		22.41		USD
Luminus Energy Partners Master Fund, Ltd.		3/31/2015	SELL		118,600		22.50		USD
Luminus Energy Partners Master Fund, Ltd.		4/01/2015	SELL		369,000		22.18		USD
Luminus Energy Partners Master Fund, Ltd.		4/02/2015	SELL		411,360		22.65		USD
Luminus Energy Partners Master Fund, Ltd.		4/06/2015	SELL		262,400		23.15		USD
Luminus Energy Partners Master Fund, Ltd.		4/08/2015	SELL		221,959		23.22		USD
Luminus Special Opportunities I Onshore, L.P.		2/09/2015	SELL		14,006		21.76		USD
Luminus Special Opportunities I Onshore, L.P.		2/11/2015	SELL		23,876		21.78		USD
Luminus Special Opportunities I Onshore, L.P.		2/13/2015	BUY		43,991		20.95		USD
Luminus Special Opportunities I Onshore, L.P.		2/13/2015	SELL		17,076		21.40		USD
Luminus Special Opportunities I Onshore, L.P.		2/17/2015	BUY		6,700		21.08		USD
Luminus Special Opportunities I Onshore, L.P.		2/18/2015	SELL		34,454		21.78		USD
Luminus Special Opportunities I Onshore, L.P.		2/19/2015	SELL		10,300		21.81		USD
Luminus Special Opportunities I Onshore, L.P.		2/20/2015	SELL		13,976		21.95		USD
Luminus Special Opportunities I Onshore, L.P.		2/24/2015	SELL		27,952		22.15		USD
Luminus Special Opportunities I Onshore, L.P.		2/27/2015	BUY		14,006		21.17		USD
Luminus Special Opportunities I Onshore, L.P.		3/02/2015	BUY		18,768		20.76		USD
Luminus Special Opportunities I Onshore, L.P.		3/04/2015	SELL		14,100		20.86		USD
Luminus Special Opportunities I Onshore, L.P.		3/05/2015	SELL		14,100		21.10		USD
Luminus Special Opportunities I Onshore, L.P.		3/10/2015	SELL		14,100		20.61		USD
Luminus Special Opportunities I Onshore, L.P.		3/17/2015	SELL		9,400		21.59		USD
Luminus Special Opportunities I Onshore, L.P.		3/18/2015	SELL		31,000		22.14		USD
Luminus Special Opportunities I Onshore, L.P.		3/27/2015	SELL		43,100		21.78		USD
Luminus Special Opportunities I Onshore, L.P.		3/30/2015	SELL		23,500		22.41		USD
Luminus Special Opportunities I Onshore, L.P.		3/31/2015	SELL		22,300		22.50		USD

13D/A
CUSIP No. 131347304	Page 19 of 20 Pages

PARTY EFFECTING TRANSACTION	DATE		BUY /SELL	QUANTITY		AVERAGE PRICE ($)*		CURRENCY
Luminus Special Opportunities I Onshore, L.P.		4/01/2015	SELL		27,400		22.16		USD
Luminus Special Opportunities I Onshore, L.P.		4/02/2015	SELL		51,840		22.65		USD
Luminus Special Opportunities I Onshore, L.P.		4/06/2015	SELL		32,900		23.15		USD
Luminus Special Opportunities I Onshore, L.P.		4/08/2015	SELL		28,980		23.22		USD
Luminus Special Opportunities I PIE Master, L.P.		2/09/2015	SELL		23,494		21.76		USD
Luminus Special Opportunities I PIE Master, L.P.		2/11/2015	SELL		40,124		21.78		USD
Luminus Special Opportunities I PIE Master, L.P.		2/13/2015	BUY		73,854		20.95		USD
Luminus Special Opportunities I PIE Master, L.P.		2/13/2015	SELL		28,735		21.40		USD
Luminus Special Opportunities I PIE Master, L.P.		2/17/2015	BUY		11,300		21.08		USD
Luminus Special Opportunities I PIE Master, L.P.		2/18/2015	SELL		57,846		21.78		USD
Luminus Special Opportunities I PIE Master, L.P.		2/19/2015	SELL		17,271		21.81		USD
Luminus Special Opportunities I PIE Master, L.P.		2/20/2015	SELL		23,524		21.95		USD
Luminus Special Opportunities I PIE Master, L.P.		2/24/2015	SELL		47,048		22.15		USD
Luminus Special Opportunities I PIE Master, L.P.		2/27/2015	BUY		23,494		21.17		USD
Luminus Special Opportunities I PIE Master, L.P.		3/02/2015	BUY		31,232		20.76		USD
Luminus Special Opportunities I PIE Master, L.P.		3/04/2015	SELL		23,500		20.86		USD
Luminus Special Opportunities I PIE Master, L.P.		3/05/2015	SELL		23,500		21.10		USD
Luminus Special Opportunities I PIE Master, L.P.		3/10/2015	SELL		23,500		20.61		USD
Luminus Special Opportunities I PIE Master, L.P.		3/17/2015	SELL		15,600		21.59		USD
Luminus Special Opportunities I PIE Master, L.P.		3/18/2015	SELL		51,700		22.13		USD
Luminus Special Opportunities I PIE Master, L.P.		3/27/2015	SELL		72,000		21.78		USD
Luminus Special Opportunities I PIE Master, L.P.		3/30/2015	SELL		39,100		22.41		USD
Luminus Special Opportunities I PIE Master, L.P.		3/31/2015	SELL		37,100		22.50		USD
Luminus Special Opportunities I PIE Master, L.P.		4/01/2015	SELL		45,600		22.16		USD
Luminus Special Opportunities I PIE Master, L.P.		4/02/2015	SELL		86,800		22.65		USD
Luminus Special Opportunities I PIE Master, L.P.		4/06/2015	SELL		54,700		23.15		USD
Luminus Special Opportunities I PIE Master, L.P.		4/08/2015	SELL		49,061		23.22		USD
Vega Asset Partners, LP		2/09/2015	BUY		10,000		21.30		USD
Vega Asset Partners, LP		2/09/2015	SELL		10,000		21.69		USD

13D/A
CUSIP No. 131347304	Page 20 of 20 Pages

PARTY EFFECTING TRANSACTION	DATE		BUY /SELL	QUANTITY		AVERAGE PRICE ($)*		CURRENCY
Vega Asset Partners, LP		2/10/2015	SELL		20,000		21.80		USD
Vega Asset Partners, LP		2/12/2015	SELL		10,000		21.69		USD
Vega Asset Partners, LP		2/13/2015	BUY		20,000		21.15		USD
Vega Asset Partners, LP		2/20/2015	SELL		20,000		21.90		USD
Vega Asset Partners, LP		2/24/2015	SELL		10,000		22.23		USD
Vega Asset Partners, LP		2/27/2015	BUY		10,000		21.21		USD
Vega Asset Partners, LP		3/06/2015	BUY		10,000		20.74		USD
Vega Asset Partners, LP		3/09/2015	BUY		10,000		20.37		USD
Vega Asset Partners, LP		3/18/2015	SELL		10,000		22.36		USD
Vega Asset Partners, LP		3/19/2015	SELL		2,800		22.19		USD
Vega Asset Partners, LP		3/23/2015	SELL		4,700		22.08		USD
Vega Asset Partners, LP		3/30/2015	SELL		15,000		22.44		USD
Vega Asset Partners, LP		3/31/2015	SELL		15,000		22.58		USD
Vega Asset Partners, LP		4/01/2015	SELL		10,000		22.14		USD
Vega Asset Partners, LP		4/02/2015	SELL		20,000		22.69		USD
Vega Asset Partners, LP		4/06/2015	SELL		20,000		23.13		USD
Vega Asset Partners, LP		4/07/2015	SELL		20,000		23.23		USD
Vega Asset Partners, LP		4/08/2015	SELL		20,000		23.15		USD
Vega Asset Partners, LP		4/09/2015	SELL		20,000		22.96		USD

* Excludes brokerage fees and commissions. All prices reported are average prices calculated within a $1.00 range.

EX-7.1

Exhibit 7.1

Fourth Amended and Restated Joint Filing Agreement

This will confirm the agreement by and among all the undersigned that the Statement on Schedule 13D filed on or about this date and any further amendments thereto with respect to beneficial ownership by the undersigned of the Common Shares, $0.001 par value, of Calpine Corporation, a Delaware corporation, is being filed on behalf of each of the undersigned in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934.

The undersigned further agree that each party hereto is responsible for timely filing of such Statement on Schedule 13D and any further amendments thereto, and for the completeness and accuracy of the information concerning such party contained therein, provided that no party is responsible for the completeness and accuracy of the information concerning the other party, unless such party knows or has reason to believe that such information is inaccurate. The undersigned further agree that this Agreement shall be included as an Exhibit to such joint filing.

This agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated: April 10, 2015

Luminus Management, LLC
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President
Luminus Energy Partners Master Fund, Ltd.
By:	Luminus Management, LLC
Its:	Investment Manager
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President

Luminus Special Opportunities I Onshore, L.P.
By:	Luminus Management, LLC
Its:	Investment Manager
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President
Luminus Special Opportunities I PIE Master, L.P.
By:	Luminus Management, LLC
Its:	Investment Manager
By:	/s/ Jonathan Barrett
Name:	Jonathan Barrett
Title:	President

2

LS Power Partners II, L.P.
By:	/s/ Darpan Kapadia
Name:	Darpan Kapadia
Title:	Managing Director
LSP Cal Holdings II, LLC
By:	/s/ Darpan Kapadia
Name:	Darpan Kapadia
Title:	Managing Director
Vega Energy GP, LLC
By:	/s/ Paul Segal
Name:	Paul Segal
Title:	President

3

Vega Asset Partners, LP
By:	Vega Energy GP, LLC
Its:	General Partner
By:	/s/ Paul Segal
Name:	Paul Segal
Title:	President
Farrington Management, LLC
By:	/s/ Mikhail Segal
Name:	Mikhail Segal
Title:	Vice President
Farrington Capital, L.P.
By:	Farrington Management, LLC
Its:	General Partner
By:	/s/ Mikhail Segal
Name:	Mikhail Segal
Title:	Vice President

4