- Amended Statement of Changes in Beneficial Ownership (4/A)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* PATTERSON WILLIAM J	2. Issuer Name and Ticker or Trading Symbol CALPINE CORP [ CPN ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __ X __ Director __ X __ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) 591 REDWOOD HIGHWAY, SUITE 3215	3. Date of Earliest Transaction (MM/DD/YYYY) 5/7/2009
(Street) MILL VALLEY, CA 94941 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY) 5/11/2009	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽¹⁾ ⁽²⁾	5/7/2009		A		14224		⁽¹⁾ ⁽²⁾	⁽¹⁾ ⁽²⁾	Common Stock	14224	$0	16944 ⁽¹⁾ ⁽²⁾	D

Explanation of Responses:
( 1)	The Form 4 initially filed by the reporting persons on May 11, 2009 had a typographical error. This amendment is being filed to correct the number of restricted stock units to 14,224 from 14,214 units previously reported. This is an award of restricted stock units, 8,956 of which are pursuant to the Issuer's 2008 Directors Incentive Plan and 5,268 of which are pursuant to the Issuer's 2008 Equity Incentive Plan. The award vests and becomes nonforfeitable on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of common stock of Calpine Corp. and becomes payable on the earliest to occur of (i) the reporting person's Elected Distribution Date of May 7, 2011, (ii) the consummation of a Change in Control or (iii) upon termination of service on the Board. These awards of restricted stock units were made to William J. Patterson ("WJP") as a Director and Chairman of the Board of the Issuer.
( 2)	Pursuant to the partnership agreement governing SPO Partners II, L.P. ("SPO Partners"), these units and profits arising therefrom, may be deemed to be beneficially owned by SPO Partners, and certain of it's affiliates. These units are in addition to 2,720 restricted stock units previously awarded to WJP and previously reported as restricted stock in Table I above.

Remarks:
The individuals and entities listed in the note above may be deemed to form a "group", as such term is defined in Rule 13d-5(b)(1) promulgated under the Securities Exchange Act of 1934, for purposes of this filing. This filing shall not be deemed as an admission by any such person that such person is, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the beneficial owner of any equity securities covered by this statement. Each such person disclaims beneficial ownership of the reported securities except to the extent of such person's pecuniary interest, if any, therein.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
PATTERSON WILLIAM J 591 REDWOOD HIGHWAY, SUITE 3215 MILL VALLEY, CA 94941	X	X
SPO ADVISORY CORP 591 REDWOOD HIGHWAY, SUITE 3215 MILL VALLEY, CA 94941		X
SPO ADVISORY PARTNERS LP 591 REDWOOD HIGHWAY, SUITE 3215 MILL VALLEY, CA 94941		X
SPO PARTNERS II LP 591 REDWOOD HIGHWAY, SUITE 3215 MILL VALLEY, CA 94941		X
SCULLY JOHN H 591 REDWOOD HIGHWAY, SUITE 3215 MILL VALLEY, CA 94941		X
OBERNDORF WILLIAM E 591 REDWOOD HIGHWAY, SUITE 3215 MILL VALLEY, CA 94941		X
MCDERMOTT EDWARD H 591 REDWOOD HIGHWAY , SUITE 3215 MILL VALLEY, CA 94941		X

Signatures
Kim Silva		6/26/2009
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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