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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
1478266	Ls Power Development, L.l.c.	Two Tower Center 11Th Floor East Brunswick NJ 08816		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	1,013,669	$1.28	65,373,139	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-26	968,415	$1.30	64,404,724	No	4	S	Indirect	See Remarks
Class A Common Stock	Disposition	2010-04-27	736,909	$1.31	63,667,815	No	4	S	Indirect	See Remarks

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

Footnotes

Of these shares, LS Power Associates, L.P. ("LSP Associates") sold 145,617 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, LS Power Partners, L.P. ("LSP Partners") sold 16,955 shares and LSP Gen Investors, L.P. ("Gen Investors") sold 12,423 shares.
Of these shares, LSP Associates directly holds 9,391,097 shares, LSPEP directly holds 33,670,497 shares, PIE I directly holds 20,416,918 shares, LSP Partners directly holds 1,093,428 shares and Gen Investors directly holds 801,199 shares.
Of these shares, LSP Associates sold 139,116 shares, LSPEP sold 498,783 shares, PIE I sold 302,449 shares, LSP Partners sold 16,198 shares and Gen Investors sold 11,869 shares.
Of these shares, LSP Associates directly holds 9,251,981 shares, LSPEP directly holds 33,171,714 shares, PIE I directly holds 20,114,469 shares, LSP Partners directly holds 1,077,230 shares and Gen Investors directly holds 789,330 shares.
Of these shares, LSP Associates sold 105,860 shares, LSPEP sold 379,546 shares, PIE I sold 230,147 shares, LSP Partners sold 12,325 shares and Gen Investors sold 9,031 shares.
Of these shares, LSP Associates directly holds 9,146,121 shares, LSPEP directly holds 32,792,168 shares, PIE I directly holds 19,884,322 shares, LSP Partners directly holds 1,064,905 shares and Gen Investors directly holds 780,299 shares.