X0206 3 2017-09-29 0 0001708035 PQ Group Holdings Inc. PQG 0001319699 Craighead Martin S C/O PQ GROUP HOLDINGS INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 1 0 0 0 Common Stock 12375 D Exhibit 24.1 - Power of Attorney /s/ Joseph S. Koscinski, attorney-in-fact 2017-09-29