X0306 4 2019-03-11 0 0001708035 PQ Group Holdings Inc. PQG 0001438324 Crews Michael C. C/O PQ GROUP HOLDINGS INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 0 1 0 0 See Remarks Common Stock 2019-03-11 4 A 0 48669 0.00 A 269498 D Common Stock 28005 I By family trust Corrects the inadvertent inclusion of one extra share of common stock in the transaction reported by Mr. Crews on a Form 4 filed on October 4, 2018. Represents shares of common stock held by a family trust. Mr. Crews disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein, and the filing of this report is not an admission that Mr. Crews is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. Executive Vice President and Chief Financial Officer /s/ Joseph S. Koscinski, as attorney-in-fact for Michael C. Crews 2019-03-13