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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	2010-04-05	5,135	$1.26	1,374,335	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-05	257,763	$1.26	68,989,796	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-06	7,635	$1.28	1,366,700	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-06	383,287	$1.28	68,606,509	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-07	4,765	$1.26	1,361,935	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-07	243,950	$1.26	68,367,324	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 158,120 shares, LS Power Equity Partners PIE I, L.P. ("PIE I") sold 95,880 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 3,763 shares.
Of these shares, LSPEP directly holds 42,320,630 shares, PIE I directly holds 25,662,133 shares, and Gen Investors directly holds 1,007,033 shares.
Of these shares, LSPEP sold 235,121 shares, PIE I sold 142,571 shares and Gen Investors sold 5,595 shares.
Of these shares, LSPEP directly holds 42,085,509 shares, PIE I directly holds 25,519,562 shares, and Gen Investors directly holds 1,001,438 shares.
Of these shares, LSPEP sold 146,724 shares, PIE I sold 88,970 shares and Gen Investors sold 3,491 shares.
Of these shares, LSPEP directly holds 41,938,785 shares, PIE I directly holds 25,430,592 shares, and Gen Investors directly holds 997,947 shares.