William Sichko

PQ Corp. produces silicate, zeolite, and other performance materials. It serves the detergent, pulp and paper, chemical, petroleum, catalyst, water treatment, construction and beverage markets. The firm's products include lithium silicates, magnesium sulfate, sodium silicate liquids and solids. It also manufactures silica gel products for catalyst and anti-blocking applications and the zeolite products for adsorbent applications. The company was founded by Joseph Elkinton in 1831 and is headquartered in Malvern, PA.

PQ Holdings, Inc. operates as an integrated global innovator. It also manufactures specialty inorganic performance chemicals, specialty catalysts and specialty glass materials. The company's business produces sodium silicate, specialty silicas and other high performance chemical products for the personal care, food, detergent, pulp and paper, electronics, mining, oil processing and construction industries. PQ Holdings was founded on June 22, 2007 and is headquartered in Chula Vista, CA.

Founded in 2007, PQ Silicas UK Ltd. is a subsidiary of Ecovyst, Inc. that manufactures inorganic basic chemicals. The company is based in Warrington, UK.

PQ Germany GmbH manufactures industrial chemicals. The company is headquartered in Wurzen, Germany.

Part of Ecovyst, Inc., PQ France SAS is a French company that manufactures basic inorganic chemicals. The company is based in Trosly Breuil, France. The CEOs are Joseph Steven Koscinski, William James Sichko. The company was founded in 2002.

Part of Potters Industries LLC, Potters Ballotini SAS is a French company that engages in manufacturing and shaping glass articles. The company is based in Saint-Pourçain-sur-Sioule, France. The CEOs of the company are Joseph Steven Koscinski and William James Sichko.

Part of Potters Industries LLC, Potters Ballotini GmbH is a German company that manufactures and distributes plastic products. The company is based in Kirchheimbolanden, Germany. The CEOs are Joseph Steven Koscinski, Warwick Mayall. The company was founded in 2011.

Peak Investments LLC (Peak Investments) is a private equity firm founded in 1998. The firm is headquartered in Lenexa, Kansas.

Harris Chemical Group, Inc. produces soda ash and boron products. It is a subsidiary of IMC Global, Inc. The company is headquartered in New York City, NY