PQ Group Holdings Inc. is a global provider of specialty catalysts, chemicals and services. The Company's products and services support customers globally through its network of manufacturing facilities. The Company conduct its operations through three business segments: Refining Services, which is a provider of sulfuric acid recycling to the North American refining industry for the production of alkylate; Catalysts that serves the packaging and engineering plastics and the global refining, petrochemical and emissions control industries; and Performance Chemicals, which supplies diverse product end uses, including personal and industrial cleaning products, fuel efficient tires, surface coatings, and food and beverage products. The Company serves various markets, which includes fuels and emissions controls, consumer products, construction, packaging and engineering plastics, industrial and process chemicals and natural resources.