X0306 4 2017-03-01 0 0001397516 REX ENERGY CORP REXX 0001519559 MCDONOUGH JENNIFER L 366 WALKER DRIVE STATE COLLEGE PA 16801 0 1 0 0 SVP, General Counsel and Secr. Common Stock 2017-03-01 4 F 0 14460 0.63 D 220623 D Common Stock 2017-03-01 4 F 0 372 0.63 D 198843 D The reporting person had an award of restricted stock cliff vest in accordance with the provisions of a grant made on March 15, 2016. In connection with the vesting the reported shares of stock were sold to cover tax withholding obligations. The reporting person had an award of performance based restricted stock vest in accordance with the provisions of a grant made on December 15, 2013. In connection with the vesting the reported shares of stock were sold to cover tax withholding obligations. The number of securities beneficially owned has been reduced by 21,408 performance based shares that have been forfeited due to the issuer not meeting the performance criteria for these shares to vest. Jennifer L. McDonough 2017-03-03