Dennis Keller

Nicor, Inc. provides natural gas distribution services and international shipping services. The company operates through three segments Gas Distribution, Shipping and Wholesale Marketing. Nicor was founded in 1976 and is headquartered in Naperville, IL.

Northern Illinois Gas Co. distributes natural gas properties. It also provides natural gas storage and transmission-related services to marketers and other gas distribution companies. The company was founded in 1954 and is headquartered in Naperville, IL.

Rush University Medical Center engages in the provision of health care services. The company was founded in 1972 and is headquartered in Chicago, IL.

Ryerson, Inc. is a platinum equity company, which engages in the processing and distribution of metal products. The company process and distributes products in stainless steel, aluminum, carbon steel and alloy steels and a limited line of nickel and red metals in various shapes and forms which include coils, sheets, rounds, hexagons, square and flat bars, plates, structurals and tubing. It provides a broad range of processing and fabrication services and supply chain solutions, including just-in-time delivery and value-added components to original equipment manufacturers. The company's services include: just-in-time inventory programs, production of kits containing multiple products for ease of assembly by the customer, consignment arrangements, and production and technical assistance. Ryerson was founded in 1842 and is headquartered in Chicago, IL.

African Wildlife Foundation, Inc. operates an international conservation organization focused on the African continent. The organization programs and conservation strategies are based on science and designed to protect both the wild lands and wildlife of Africa. The organization was founded in 1961 and is headquartered in Washington, DC.

Chicago Zoological Society, Inc. provides animal care services. It provides indoor animal exhibition, family play zoo, dolphin presentations, and motor safari tram tours. The firm offers programming for various groups, including teachers, schools, youth groups, groups with disabilities, community groups, and teens, as well as individuals, families, and children. The company was founded in 1934 and is headquartered in Brookfield, IL.

United States Ski Team Foundation is a non-profit organization. It provides a range of membership programs for athletes and other young skiers engages in athletic programs. The company was founded in 1964 and is headquartered in Park City, UT.