William Patrick Kelly

Unifrax is a leading producer of high temperature insulation products for a wide variety of industrial applications. The firm's well-known Fiberfrax ceramic fiber product line, revolutionary Insulfrax and Isofrax, soluble fiber products, and other high temperature insulation products provide innovative heat management solutions and exceptional value to their customers in a wide range of markets. With manufacturing and sales presence in the global marketplace, and a leadership position in the global high temperature fibers market, Unifrax offers its worldwide customers the high quality products, service and support that have been the Unifrax standard for more than 60 years.

Bison Merger Sub I LLC engages in the provision and supply of proppants and sand products. It operates through the Proppant Solutions; and Industrial & Recreational Products (I&R) segments. The Proppant Solutions predominantly provides sand-based proppants for use in hydraulic fracturing operations through the U.S. and Canada, Argentina, Mexico, China, and northern Europe. The I&R segment provides raw, coated, and custom blended sands to foundry, buildings products, glass, turf and landscape, and filtration industry in North America. The company was founded in 1986 and is headquartered in Chesterland, OH.

Kirtland Capital Partners LLC (Kirtland Capital Partners) is a private equity firm founded in 1977. The firm is headquartered in Cleveland, Ohio.

Part of Compagnie de Saint-Gobain SA, Carborundum Co. Ltd. is a British company that specializes in the manufacture of high temperature refractory materials, insulation materials, and heating elements. The company is based in St. Helens, UK. William Patrick Kelly has been the CEO of the company since 1996. Carborundum Co. was acquired by Compagnie de Saint-Gobain SA on March 01, 1996.

Fairmount Santrol, Inc. engages in the production of sand and sand-based products used by oil and gas exploration. The firm also provides foundry, building products, water filtration, and oil and gas solutions. The company was founded by William E. Conway in 1978 and is headquartered in Chesterland, OH.

Unifrax I LLC manufactures and supplies fibers and inorganic materials. It offers blankets, boards, coatings, custom mat products, fibers, fire protection, and furnace hardware. The firm serves the aerospace, automotive, ceramic and glass, filtration and separation, automotive and power generation industries. The company was founded in 1891 and is headquartered in Tonawanda, NY.

Rent-A-PC, Inc. provides computer and technology rentals services. The firm also provides rents business PC laptops, PC tablets and Apple MacBook Pro's for business travelers, salespeople and executives. It also offers printers, copiers, scanners, routers and fax machines for rental basis. Rent-A-PC was founded in 1984 by Julian Sandler and is headquartered in Hauppauge, NY.

Smart Source Holdings LLC provides technology solutions for businesses and events. It maintains the national footprint in the computer and audio visual rental space. The company was founded by Julian Sandler in 1984 and is headquartered in Hauppauge, NY.

Covia Holdings LLC. engages in the provision of diversified mineral-based and material solutions. It offers custom toll blending, micronization, bagging and packaging, and logistics. The company was founded in 1970 and is headquartered in Independence, OH.