X0306 4 2015-08-18 0 0001379895 DYNEGY INC. DYN 0001374018 Burke Carolyn Jeanne 601 TRAVIS 14TH FLOOR HOUSTON TX 77002 0 1 0 0 EVP Common Stock 2015-08-18 4 P 0 3000 25.66 A 62647 D The price reported in column 4 is the weighted average price. These shares were purchased in multiple transactions at prices ranging from $25.61 to $25.76, inclusive. The reporting person undertakes to provide to Dynegy Inc., any security holder to Dynegy Inc. or staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein. Amount includes 9,024 restricted stock units that vest on October 29, 2015, 5,411 restricted stock units that vest on March 18, 2016, 9,263 restricted stock units that vest in two annual equal installments beginning on March 3, 2016 and 11,564 restricted stock units that vest in three annual equal installments beginning on March 3, 2016. /s/ Heidi D. Lewis, Attorney-in-Fact 2015-08-18