X0306 4 2015-06-03 0 0001379895 DYNEGY INC. DYN 0001558582 Ackermann Hilary E. 601 TRAVIS, SUITE 1400 HOUSTON TX 77002 1 0 0 0 Common Stock 2015-06-03 4 A 0 3393 0 A 14489 D Grants of restricted stock units approved by Issuer's Compensation and Human Resources Committee of the Board of Directors on June 3, 2015. Restricted stock units grant pursuant to Rule 16b-3(d). The restricted stock units were issued in connection with the Reporting Person's director compensation, and the number of units issued was calculated based on the closing stock price of the Issuer's common stock of $32.42 on June 3, 2015. Each restricted stock unit represents a contingent right to receive one share of Dynegy Inc. common stock. The restricted stock units vest in full on June 3, 2016. /s/ Heidi D. Lewis, Attorney-in-Fact 2015-06-05