X0202 3 2004-05-20 0 0000879215 DYNEGY INC /IL/ DYN 0001212331 MAZANEC GEORGE L SUITE 5800 1000 LOUISIANA STREET HOUSTON TX 77002 1 0 0 0 Class A Common Stock 14000 D Class A Common Stock 1000 I by Mazanec Foundation Class A Common Stock 500 I by Rachel Mazanec Trust Class A Common Stock 500 I by Jason Mazanec Trust Reflects shares held by the Mazanec Foundation, of which the reporting person is President and director. Reflects shares held by the Rachel Mazanec Trust, a family trust managed by the reporting person, in his capacity as trustee, for the benefit of his granddaughter. Reflects shares held by the Jason Mazanec Trust, a family trust managed by the reporting person, in his capacity as trustee, for the benefit of his grandson. J. Kevin Blodgett, Attorney-in-Fact 2004-06-01