X0306 4 2018-08-13 0 0001681714 WildHorse Resource Development Corp WRD 0001531736 Clarkson Jonathan M 9805 KATY FREEWAY, SUITE 400 HOUSTON TX 77024 1 0 0 0 Common Stock 2018-08-13 4 P 0 150 18.90 A 150 I By Wife Common Stock 24269 D This transaction was executed in a single open market transaction. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. /s/ Kyle N. Roane, Attorney-in-Fact 2018-08-15