X0306 4 2018-03-23 0 0001708035 PQ Group Holdings Inc. PQG 0001217378 GENTILCORE JAMES C/O PQ GROUP HOLDINGS INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 1 1 0 0 See Remarks Common Stock 2018-03-23 4 P 0 10340 14.50 A 280235 I By family trust Common Stock 324101 D Represents shares of common stock held by a family trust. Mr. Gentilcore 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. Gentilcore 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. Chief Executive Officer, President and Chairman of the Board /s/ Joseph S. Koscinski, as attorney-in-fact for James F. Gentilcore 2018-03-27