PQ Corporation President and CEO Belgacem Chariag Elected Chairman of the Board of Directors

PQ Group Holdings Inc. (NYSE:PQG), a leading integrated and innovative global provider of specialty catalysts, materials, chemicals and services, announced today that Belgacem Chariag has been elected as Chairman of the PQ Board of Directors. As President and Chief Executive Officer, Mr. Chariag has been a member of the PQ Board since 2018, when he joined the company.

"Belgacem is a talented and dedicated executive who has led PQ with intelligence, a sense of purpose and always with the best interest of PQ's shareholders in mind," said Timothy Walsh, PQ's lead independent director. "The PQ Board is confident that Belgacem will bring these same leadership traits to his service as our Chairman."

"My highest priorities for PQ are the safety of our employees, the highest level of collaboration with our customers and the creation of value for our shareholders," said Mr. Chariag. "I thank the Board members for their confidence in me, and I look forward to advancing these priorities in this new role."

Mr. Chariag has led a distinguished career marked by nearly three decades of experience in the industrial sector. Immediately prior to joining PQ, he served as Chief Global Operations Officer at Baker Hughes, a GE Company, after Baker Hughes' merger with GE Oil & Gas.

Investor Contact:

Nahla A. Azmy

(610) 651-4561

Nahla.Azmy@pqcorp.com

Media Contact:

Kathleen Stanley

(201) 486-3729

Kathleen.Stanley@pqcorp.com

About PQ Group Holdings Inc.

PQ Group Holdings Inc. and subsidiaries is a leading integrated and innovative global provider of specialty catalysts, materials, chemicals and services. We support customers globally through our strategically located network of manufacturing facilities. We believe that our products, which are predominantly inorganic, and services contribute to improving the sustainability of the environment.

We have four uniquely positioned specialty businesses: Refining Services provides sulfuric acid recycling to the North American refining industry; Catalysts serves the packaging and engineering plastics and the global refining, petrochemical and emissions control industries; Performance Materials produces transportation reflective safety markings for roads and airports; and Performance Chemicals supplies diverse product end uses, including personal and industrial cleaning products, fuel-efficient tires, surface coatings, and food and beverage products.

We serve over 4,000 customers globally across many end uses and operate over 70 manufacturing facilities which are strategically located across six continents. For more information, see our website at https://www.pqcorp.com.

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