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 *
Segal Mikhail
   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)
C/O LS POWER EQUITY ADVISORS, LLC, 1700 BROADWAY, 35TH FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
04/23/2010
(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 04/23/2010   S   1,013,669 (1) D $ 1.2816 65,373,139 (2) I See Remarks
Class A Common Stock 04/26/2010   S   968,415 (3) D $ 1.3025 64,404,724 (4) I See Remarks
Class A Common Stock 04/27/2010   S   736,909 (5) D $ 1.308 63,667,815 (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
Segal Mikhail
C/O LS POWER EQUITY ADVISORS, LLC
1700 BROADWAY, 35TH FLOOR
NEW YORK, NY 10019		     X    

Signatures

 /s/ Mikhail Segal   04/27/2010
**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 Associates, L.P. ("LSP Associates") sold 145,617 shares, LS Power Equity Partners, L.P. ("LSPEP") sold 522,091 shares, LS Power Equity Partners PIE I, L.P. ("PIE I") sold 316,583 shares, LS Power Partners, L.P. ("LSP Partners") sold 16,955 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 12,423 shares.
(2) Of these shares, LSP Associates directly holds 9,391,097 shares, LSPEP directly holds 33,670,497 shares, PIE I directly holds 20,416,918 shares, LSP Partners directly holds 1,093,428 shares and Gen Investors directly holds 801,199 shares.
(3) Of these shares, LSP Associates sold 139,116 shares, LSPEP sold 498,783 shares, PIE I sold 302,449 shares, LSP Partners sold 16,198 shares and Gen Investors sold 11,869 shares.
(4) Of these shares, LSP Associates directly holds 9,251,981 shares, LSPEP directly holds 33,171,714 shares, PIE I directly holds 20,114,469 shares, LSP Partners directly holds 1,077,230 shares and Gen Investors directly holds 789,330 shares.
(5) Of these shares, LSP Associates sold 105,860 shares, LSPEP sold 379,546 shares, PIE I sold 230,147 shares, LSP Partners sold 12,325 shares and Gen Investors sold 9,031 shares.
(6) Of these shares, LSP Associates directly holds 9,146,121 shares, LSPEP directly holds 32,792,168 shares, PIE I directly holds 19,884,322 shares, LSP Partners directly holds 1,064,905 shares and Gen Investors directly holds 780,299 shares.
 
Remarks:
As a result of the Reporting Person's position, relationship and/or affiliation with the general partners of LS Power Partners, L.P.,
LS Power Associates, L.P., LS Power Equity Partners, L.P., LS Power Equity Partners PIE I, L.P., and LSP Gen Investors, L.P. (collectively,
the "LS Entities"), the Reporting Person may be deemed the beneficial owner of the Issuer's securities held by the
LS Entities.  The Reporting Person disclaims beneficial ownership of such securities, and this report shall not be deemed an admission
that the Reporting Person is the beneficial owner of the Issuer's securities reported on this Form 4 for purposes of Section 16
of the Securities Exchange Act of 1934, as amended, or for any other purpose.

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