Ownership Submission
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

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(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
LS Power Partners, L.P.
   2. Issuer Name and Ticker or Trading Symbol
DYNEGY INC. [DYN] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
1700 BROADWAY, 35TH FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
04/20/2010
(Street)

NEW YORK, NY 10019		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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)
Code V Amount (A) or (D) Price
Class A Common Stock 04/20/2010   S   24,653 D $ 1.1905 1,146,108 D  
Class A Common Stock 04/20/2010   S   1,237,565 (1) D $ 1.1905 57,533,041 (2) I See Remarks
Class A Common Stock 04/21/2010   S   13,430 D $ 1.2224 1,132,678 D  
Class A Common Stock 04/21/2010   S   674,172 (3) D $ 1.2224 56,858,869 (4) I See Remarks
Class A Common Stock 04/22/2010   S   22,295 D $ 1.2631 1,110,383 D  
Class A Common Stock 04/22/2010   S   1,119,158 (5) D $ 1.2631 55,739,711 (6) I See Remarks

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
LS Power Partners, L.P.
1700 BROADWAY
35TH FLOOR
NEW YORK, NY 10019		     X    

Signatures

 /s/ Darpan Kapadia, Managing Director   04/22/2010
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Of these shares, LS Power Equity Partners, L.P. ("LSPEP") sold 759,163 shares, LS Power Equity Partners PIE I, L.P. ("PIE I") sold 460,337 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 18,065 shares.
(2) Of these shares, LSPEP directly holds 35,292,676 shares, PIE I directly holds 21,400,566 shares, and Gen Investors directly holds 839,799 shares.
(3) Of these shares, LSPEP sold 413,559 shares, PIE I sold 250,772 shares and Gen Investors sold 9,841 shares.
(4) Of these shares, LSPEP directly holds 34,879,117 shares, PIE I directly holds 21,149,794 shares, and Gen Investors directly holds 829,958 shares.
(5) Of these shares, LSPEP sold 686,529 shares, PIE I sold 416,293 shares and Gen Investors sold 16,336 shares.
(6) Of these shares, LSPEP directly holds 34,192,588 shares, PIE I directly holds 20,733,501 shares, and Gen Investors directly holds 813,622 shares.
 
Remarks:
LS Power Partners, L.P. ("LSP Partners") is the general partner of  LS Power Equity Partners, L.P. ("LSPEP"), LS
Power Equity Partners PIE I, L.P. ("PIE I") and LSP Gen Investors, L.P. ("Gen Investors").  As a result of its
relationship with LSPEP, PIE I, and Gen Investors, LSP Partners may be deemed to have shared voting and investment power with respect
to the shares beneficially owned by LSPEP, PIE I, and Gen Investors.  As such, LSP Partners may be deemed to have shared beneficial
ownership of the shares of which LSPEP, PIE I, and Gen Investors are the owners.  LSP Partners, however, disclaims beneficial ownership
of such shares except to the extent of its pecuniary interest therein.

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