X0306 4 2017-03-08 0 0001379895 DYNEGY INC. DYN 0001428577 Freeland Clint 601 TRAVIS 14TH FLOOR HOUSTON TX 77002 0 1 0 0 Exec. VP and CFO Common Stock 2017-03-08 4 M 0 10846 A 107074 D Common Stock 2017-03-08 4 F 0 4588 7.62 D 102486 D Restricted Stock Units 2017-03-08 4 M 0 10846 0.00 D Common Stock 10846 21692 D Each restricted stock unit is the economic equivalent of one share of Dynegy Inc. common stock. These restricted stock units were withheld to pay the taxes applicable to the vesting of 10,846 units of restricted stock on March 8, 2017. Reflects closing stock price on March 8, 2017. Amount includes 4,711 restricted stock units that vest on March 3, 2018 and 39,277 restricted stock units that vest in three annual equal installments beginning on March 1, 2018. On March 8, 2016, the reporting person was granted 32,538 restricted stock units representing the contingent right to receive for each restricted stock unit one share of Dynegy Inc. common stock or the cash equivalent of one share of common stock. The restricted stock units vest in three annual equal installments beginning on March 8, 2017. /s/ Heidi D. Lewis, Attorney-in-Fact 2017-03-09