X0306 4 2017-04-19 0 0001691303 WARRIOR MET COAL, INC. HCC 0001702386 Williams Stephen D. 16243 HIGHWAY 216 BROOKWOOD AL 35444 1 0 0 0 Restricted Stock Units 2017-04-19 4 A 0 13157 0.00 A Common Stock 13157 13157 D All of the reported restricted stock units were granted under the Warrior Met Coal, Inc. 2017 Equity Incentive Plan and vested as of April 19, 2017, the date of grant. The units will settle in shares of common stock of Warrior Met Coal, Inc. on a one-for-one basis in a single installment on the earlier to occur of (i) a change of control or (ii) the fifth anniversary of the date of grant. /s/ Stephen D. Williams 2017-04-19