X0306 4 2015-12-17 0 0001497770 Walker & Dunlop, Inc. WD 0001503841 Walker William M C/O WALKER & DUNLOP, INC. 7501 WISCONSIN AVENUE, SUITE 1200E BETHESDA MD 20814 1 1 0 0 Chairman & CEO Common Stock 2015-12-17 4 M 0 40000 12.52 A 1583320 D Common Stock 2015-12-17 4 M 0 9258 13.05 A 1592578 D Common Stock 2015-12-17 4 S 0 49258 28.3783 D 1543320 D Common Stock 2015-12-18 4 M 0 59827 13.05 A 1603147 D Common Stock 2015-12-18 4 S 0 59827 28.2595 D 1543320 D Common Stock 1675 I As Custodian for Son 1 Common Stock 1675 I As Custodian for Son 2 Common Stock 1675 I As Custodian for Son 3 Stock Option 12.52 2015-12-17 4 M 0 40000 0 D 2014-03-24 2021-03-24 Common Stock 40000 0 D Stock Option 13.05 2015-12-17 4 M 0 9258 0 D 2015-04-30 2022-04-30 Common Stock 9258 59827 D Stock Option 13.05 2015-12-18 4 M 0 59827 0 D 2015-04-30 2022-04-30 Common Stock 59827 0 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.07 to $28.90. The reporting person undertakes to provide Walker & Dunlop, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.00 to $28.45. The reporting person undertakes to provide Walker & Dunlop, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Richard M. Lucas, Attorney-in-fact 2015-12-18