X0306 4 2018-09-10 0 0001708035 PQ Group Holdings Inc. PQG 0001718007 Ferrall Paul C/O PQ GROUP HOLDINGS INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 0 1 0 0 See Remarks Common Stock 2018-09-10 4 S 0 1800 17.91 D 747178 D Common Stock 2018-09-11 4 S 0 2939 17.92 D 744239 D The price reported in Column 4 is a weighted average price. The shares sold on September 10, 2018 were sold in multiple transactions at prices ranging from $17.90 to $17.93, inclusive. The shares sold on September 11, 2018 were sold in multiple transactions at prices ranging from $17.90 to $17.935, inclusive. The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein. Senior Vice President-Strategic Development /s/ Joseph S. Koscinski, as attorney-in-fact for Paul Ferrall 2018-09-12