X0306 4 2017-03-01 0 0001379895 DYNEGY INC. DYN 0001530677 James Catherine C. 601 TRAVIS 14TH FLOOR HOUSTON TX 77002 0 1 0 0 Exec VP and General Counsel Common Stock 2017-03-01 4 A 0 37095 0 A 91479 D Employee Stock Option (Right to Buy) 8.02 2017-03-01 4 A 0 57278 0 A 2027-03-01 Common Stock 57278 57278 D The grants of the restricted stock units were approved by a committee of the Issuer's Board of Directors on March 1, 2017. Restricted stock unit grant pursuant to Rule 16b-3(d). Each restricted stock unit represents a contingent right to receive one share of Dynegy Inc. common stock. The restricted stock units vest in three annual equal installments beginning on March 1, 2017. Amount includes 4,631 restricted stock units that vest on March 3, 2017 and 7,709 restricted stock units that vest in two annual equal installments beginning on March 3, 2017. The grants of the stock options were approved by a committee of the Issuer's Board of Directors on March 1, 2017. Option grant pursuant to rule 16b-3(d). The option becomes exercisable in three annual equal installments beginning March 1, 2018. /s/ Heidi D. Lewis, Attorney-in-Fact 2017-03-03