X0306 4 2015-03-18 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 2015-03-18 4 F 0 3055 28.84 D 66644 D These restricted stock units were withheld by Issuer to pay the taxes applicable to the vesting of 7,215 units of restricted stock on March 18, 2015. Reflects closing stock price on March 18, 2015. Amount includes 9,024 restricted stock units that vest on October 29, 2015, 7,215 restricted stock units that vest on March 18, 2016, 9,553 restricted stock units that vest in two annual equal installments beginning on March 3, 2016 and 14,134 restricted stock units that vest in three annual equal installments beginning on March 3, 2016. /s/ Heidi D. Lewis, Attorney-in-Fact 2015-03-20