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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	2010-04-30	8,057	$1.36	1,037,669	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-30	404,460	$1.36	52,089,552	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-05-03	4,157	$1.34	1,033,512	No	4	S	Direct
Class A Common Stock	Disposition	2010-05-03	208,678	$1.34	51,880,874	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-05-04	8,693	$1.31	1,024,819	No	4	S	Direct
Class A Common Stock	Disposition	2010-05-04	436,367	$1.31	51,444,507	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 248,109 shares, LS Power Equity Partners PIE I, L.P. ("PIE I") sold 150,447 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 5,904 shares.
Of these shares, LSPEP directly holds 31,953,459 shares, PIE I directly holds 19,375,751 shares, and Gen Investors directly holds 760,342 shares.
Of these shares, LSPEP sold 128,010 shares, PIE I sold 77,622 shares and Gen Investors sold 3,046 shares.
Of these shares, LSPEP directly holds 31,825,449 shares, PIE I directly holds 19,298,129 shares, and Gen Investors directly holds 757,296 shares.
Of these shares, LSPEP sold 267,681 shares, PIE I sold 162,316 shares and Gen Investors sold 6,370 shares.
Of these shares, LSPEP directly holds 31,557,768 shares, PIE I directly holds 19,135,813 shares, and Gen Investors directly holds 750,926 shares.