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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	2010-04-08	11,402	$1.20	1,350,533	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-08	572,380	$1.20	67,794,944	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-09	10,881	$1.19	1,339,652	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-09	546,198	$1.19	67,248,746	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-12	23,824	$1.23	1,315,828	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-12	1,195,912	$1.23	66,052,834	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 351,117 shares, LS Power Equity Partners PIE I, L.P. ("PIE I") sold 212,908 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 8,355 shares.
Of these shares, LSPEP directly holds 41,587,668 shares, PIE I directly holds 25,217,684 shares, and Gen Investors directly holds 989,592 shares.
Of these shares, LSPEP sold 335,056 shares, PIE I sold 203,169 shares and Gen Investors sold 7,973 shares.
Of these shares, LSPEP directly holds 41,252,612 shares, PIE I directly holds 25,014,515 shares, and Gen Investors directly holds 981,619 shares.
Of these shares, LSPEP sold 733,612 shares, PIE I sold 444,843 shares and Gen Investors sold 17,457 shares.
Of these shares, LSPEP directly holds 40,519,000 shares, PIE I directly holds 24,569,672 shares, and Gen Investors directly holds 964,162 shares.