X0306 4 2020-03-18 0 0001708035 PQ Group Holdings Inc. PQG 0001463291 Chariag Belgacem C/O PQ GROUP HOLDINGS INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 1 1 0 0 See Remarks Common Stock 2020-03-18 4 P 0 41574 9.3106 A 300903 D Common Stock 2020-03-19 4 P 0 11926 10.2226 A 312829 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $8.98 to $9.52, 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 purchased at each separate price within the range set forth in footnotes (1) and (2) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $9.72 to $10.58, inclusive. Chairman of the Board, Chief Executive Officer and President /s/ Joseph S. Koscinski, as attorney-in-fact for Belgacem Chariag 2020-03-20