X0306 4 2016-10-01 0 0001397516 REX ENERGY CORP REXX 0001248273 MATTSON ERIC L C/O REX ENERGY CORPORATION 366 WALKER DRIVE STATE COLLEGE PA 16801 1 0 0 0 Common Stock 2016-10-01 4 A 0 30822 0.00 A 99642 D Phantom Stock 2016-10-01 4 A 0 20548 0.00 A Common Stock 20548 33964 D Represents shares of restricted stock granted pursuant to the Issuer's 2016 Long-Term Incentive Plan. Shares vest ratably in one-third installments on September 1, 2017, September 1, 2018, and September 1, 2019. Represents shares of phantom stock granted pursuant to the Issuer's 2016 Long-Term Incentive Plan that are the economic equivalent of shares of stock. The shares of phantom stock are payable in cash upon vesting in accordance with the vesting schedule described in footnote 1. Jennifer McDonough on behalf of Eric L. Mattson 2016-10-04