X0306 4 2017-03-01 0 0001379895 DYNEGY INC. DYN 0001543686 Walden John Clinton 601 TRAVIS STREET SUITE 1400 HOUSTON TX 77002 0 1 0 0 VP and Chief Acct Officer Common Stock 9920 D Employee Stock Option (Right to Buy) 8.02 2017-03-01 4 A 0 15499 0 A 2027-03-01 Common Stock 15499 15499 D Restricted Stock Units 2017-03-01 4 A 0 21509 8.02 A Common Stock 21509 28636 D Amount includes 1,158 restricted stock units that vest on March 3, 2017and 1,927 restricted stock units that vest in two annual equal installments beginning on March 3, 2017. The grants of 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 on March 1, 2018. 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 16(b)-3(d). Each restricted stock unit represents a contingent right to receive one share of Dynegy Inc. common stock, if available, or the economic cash equivalent of one share of common stock. The restricted stock units vest in three annual equal installments beginning on March 1, 2018. /s/ Heidi D. Lewis, Attorney-in-Fact 2017-03-03