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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1379895	Dynegy Inc.	DYN	Electric Services (4911)	205653152

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1405847	Ls Power Partners, L.p.	1700 Broadway 35Th 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
Class A Common Stock	Disposition	2010-04-23	16,955	$1.28	1,093,428	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-23	851,097	$1.28	54,888,614	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-26	16,198	$1.30	1,077,230	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-26	813,101	$1.30	54,075,513	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-27	12,325	$1.31	1,064,905	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-27	618,724	$1.31	53,456,789	No	4	S	Indirect	See Remarks

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

Footnotes

Of these 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 and LSP Gen Investors, L.P. ("Gen Investors") sold 12,423 shares.
Of these shares, LSPEP directly holds 33,670,497 shares, PIE I directly holds 20,416,918 shares, and Gen Investors directly holds 801,199 shares.
Of these shares, LSPEP sold 498,783 shares, PIE I sold 302,449 shares and Gen Investors sold 11,869 shares.
Of these shares, LSPEP directly holds 33,171,714 shares, PIE I directly holds 20,114,469 shares, and Gen Investors directly holds 789,330 shares.
Of these shares, LSPEP sold 379,546 shares, PIE I sold 230,147 shares and Gen Investors sold 9,031 shares.
Of these shares, LSPEP directly holds 32,792,168 shares, PIE I directly holds 19,884,322 shares, and Gen Investors directly holds 780,299 shares.