X0306 4 2015-05-11 0 0001379895 DYNEGY INC. DYN 0001236545 FLEXON ROBERT C 601 TRAVIS 14TH FLOOR HOUSTON TX 77002 1 1 0 0 President and CEO Common Stock 2015-05-11 4 A 0 153563 0 A 401871 D The grants of the restricted stock units were approved by a committee of the Issuer's Board of Directors on May 11, 2015. Restricted stock unit grant pursuant to Rule 16(b)-3(d). Each restricted stock unit represents a contingent right to receive one share of Dynegy Inc. common stock. The restricted stock units vest on April 30, 2018. Amount includes 35,093 restricted stock units that vest on October 29, 2015, 21,645 restricted stock units that vest on March 18, 2016, 38,211 restricted stock units that vest in two annual equal installments beginning on March 3, 2016, 60,261 restricted stock units that vest in three annual equal installments beginning on March 3, 2016 and 153,563 restricted stock units that vest on April 30, 2018. /s/ Heidi D. Lewis, Attorney-in-Fact 2015-05-13