X0202 4 2007-04-02 0 0001379895 DYNEGY INC. DYN 0001212331 MAZANEC GEORGE L 1000 LOUISIANA SUITE 5800 HOUSTON TX 77002 1 0 0 0 Class A common stock 2007-04-02 4 A 0 11000 A 11000 D Class A common stock 2007-04-02 4 A 0 2500 A 2500 I By IRA Class A common stock 2007-04-02 4 A 0 1000 A 1000 I By Foundation Class A common stock 2007-04-02 4 A 0 500 A 500 I Ib IRA Class A common stock 2007-04-02 4 A 0 500 A 500 I By Trust Class A common stock 2007-04-02 4 A 0 500 A 500 I By Trust Phantom Stock 2007-04-02 4 A 0 30844.37 A Class A common stock 30844.37 30844.37 D On April 2, 2007, Dynegy Inc., expected to be renamed Dynegy Illinois Inc. (the ?Predecessor?), merged into a wholly owned subsidiary (the ?Merger?) of Dynegy Acquisition, Inc., now known as Dynegy Inc. (the ?Issuer?). In connection with the Merger, each share of Predecessor common stock was converted into the right to receive one share of Issuer common stock. Reflects shares held by the George Mazanec IRA. Reflects shares held by the Mazanec Foundation, of which the Reporting Person is President and Director. Reflects shares held by the GM Schwab IRA. 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. These shares of phantom stock are convertible to Class A common stock on a 1-for-1 basis. Upon termination of the Reporting Person?s service as a director, the shares of phantom stock become payable, at the election of the Reporting Person, in a lump sum payment or in monthly, quarterly or annual installment payments following such termination. The shares of phantom stock are payable in cash or in shares of Issuer Class A common stock. Each share of Predecessor phantom stock was converted into one share of Issuer phantom stock, with the same terms and conditions applicable to the Predecessor phantom stock, at the effective time of the Merger. /s/ Heidi D. Lewis, Attorney-in-Fact 2007-04-04