X0306 4 2015-03-03 0 0001379895 DYNEGY INC. DYN 0001620424 Cox Julius 601 TRAVIS STREET SUITE 1400 HOUSTON TX 77002 0 1 0 0 EVP - CAO Common Stock 2015-03-03 4 A 0 7003 0 A 18171 D Common Stock 2015-03-03 4 F 0 388 27.24 D 17783 D Employee Stock Option (Right to Buy) 27.24 2015-03-03 4 A 0 17313 0 A 2025-03-03 Common Stock 17313 17313 D The grants of the restricted stock units were approved by a committee of the Issuer's Board of Directors on March 3, 2015. 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 3, 2016. These restricted stock units were withheld by the issuer to pay the taxes applicable to the vesting of 1,187 units of restricted stock on March 3, 2015. Reflects the closing stock price on March 3, 2015. Amount includes 2,651 restricted stock units that vest on October 29, 2015, 3,030 restricted stock units that vest in two annual equal installments beginning on March 18, 2015, 2,374 restricted stock units that vest in two annual equal installments beginning on March 3, 2016 and 7,003 restricted stock units that vest in three annual installments beginning on March 3, 2016. The grants of the stock options were approved by a committee of the Issuer's Board of Directors on March 3, 2015. Option grant pursuant to rule 16b-3(d). The option becomes exercisable in three annual equal installments beginning March 3, 2016. Heidi Lewis 2015-03-05