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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	2010-04-15	32,300	$1.33	1,249,680	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-15	1,623,700	$1.33	62,730,007	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-15	33,496	$1.26	1,216,184	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-15	1,679,199	$1.26	61,050,808	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-16	28,251	$1.20	1,187,933	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-16	1,418,164	$1.20	59,632,644	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-19	17,172	$1.17	1,170,761	No	4	S	Direct
Class A Common Stock	Disposition	2010-04-19	862,038	$1.17	58,770,606	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
No	4	S	Direct
No	4	S	Indirect	See Remarks

Footnotes

Of these shares, LS Power Equity Partners, L.P. ("LSPEP") sold 996,000 shares, LS Power Equity Partners PIE I, L.P. ("PIE I") sold 604,000 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 23,700 shares.
Of these shares, LSPEP directly holds 38,480,699 shares, PIE I directly holds 23,333,648 shares, and Gen Investors directly holds 915,660 shares.
Of these shares, LSPEP sold 1,030,108 shares, PIE I sold 624,579 shares and Gen Investors sold 24,512 shares.
Of these shares, LSPEP directly holds 37,450,591 shares, PIE I directly holds 22,709,069 shares, and Gen Investors directly holds 891,148 shares.
Of these shares, LSPEP sold 869,949 shares, PIE I sold 527,514 shares and Gen Investors sold 20,701 shares.
Of these shares, LSPEP directly holds 36,580,642 shares, PIE I directly holds 22,181,555 shares, and Gen Investors directly holds 870,447 shares.
Of these shares, LSPEP sold 528,803 shares, PIE I sold 320,652 shares and Gen Investors sold 12,583 shares.
Of these shares, LSPEP directly holds 36,051,839 shares, PIE I directly holds 21,860,903 shares, and Gen Investors directly holds 857,864 shares.