X0303 4 2010-06-30 0 0001379895 DYNEGY INC. DYN 0001103609 TRUBECK WILLIAM L 3300 FOX STREET LONG LAKE MN 55356 1 0 0 0 Phantom Stock 2010-06-30 4 A 0 4539.56 A Class A Common Stock 4539.56 28428.69 D These shares are held in a rabbi trust and are deemed to be phantom stock that are convertible on a 1-for-1 basis. Reflects shares of phantom stock issued to the Reporting Person pursuant to the Dynegy Inc. Deferred Compensation Plan for Certain Directors, as amended, a Rule 16b-3 Plan with the issuer. The shares of phantom stock were issued in connection with the Reporting Person's director compensation for the second quarter of 2010, and the number of shares of phantom stock issued with respect to the quarter was calculated based on the stock price of the issuer's Class A common stock of $3.86 (rounded) on June 30, 2010, the last trading day of the quarter. 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 the issuer's Class A common stock. On May 25, 2010, Dynegy Inc. effected a reverse stock split at a reverse split ratio of 1-for-5, resulting in the reporting person's ownership of 95,556.51 fewer shares of phantom stock. /s/ Kimberly M. O'Brien, Attorney-in-Fact 2010-07-02