David Kelsey

Oglebay Norton Co. LLC engages in mining, processing, transporting and marketing industrial minerals and aggregates. It provides aggregates and industrial minerals for applications in the building materials, environmental, energy and industrial markets. The company operates in three segments: Great Lakes Minerals, Global Stone and Performance Minerals. The Great Lakes Minerals segment mines and distributes limestone from facilities located in northern Michigan. The Global Stone segment supplies lime, crushed and ground limestone, construction aggregates and chemical limestone in the Great Lakes region. It's products are used as a filler in building materials, waste water treatment and soil stabilization and as an aggregate for construction of highways, shopping centers, hospitals and schools. Performance Minerals segment mines and processes industrial sands. The company was founded in 1854 and is headquartered in Cleveland, OH.

Verdezyne, Inc. operates as an industrial biotechnology company. It designs and engineers enzymes, metabolic pathways, and microorganisms that produce target chemicals. The firm offers Biolon DDDA, Adipic acid, and Sebacic Acid. The company was founded in 2005 and is headquartered in Carlsbad, CA.

Elevance Renewable Sciences, Inc. engages in the production of novel and specialty chemicals from plant oils. It offers cleaning and personal care ingredients, coating materials, oil field chemicals, surfactant intermediates, and polymer building blocks products. The company was founded in 2007 and is headquartered in Pearland, TX.