David W. Fox

USG Corp. engages in the manufacture and sale of building materials and solutions. It offers products for use in new residential, new nonresidential, and residential and nonresidential repair and remodel construction, as well as products used in certain industrial processes. It operates through the following segments: U.S. Wallboard and Surfaces; U.S. Performance Materials; U.S. Ceilings; Canada; and Other. The company was founded in 1902 and is headquartered in Chicago, IL.

Miami Corp. is an investment advisory firm located in Chicago

NYSE Chicago, Inc. offers technology based national securities exchange services. It provides business to transact in all equity securities traded on NYSE, AMEX, NASDAQ, or other national securities exchanges. CHX acts as a venue for hedge funds, options market markers, quantitative, professional and active individual traders that require immediate and automated execution. The firm provides services through its technology products including CHXBD, CHX SHARE and SNAP. The company was founded in 1882 and is headquartered in Chicago, IL.

Northwestern Memorial Hospital provides healthcare services. The firm offers acute and tertiary inpatient care, ambulatory care, wellness and prevention programs. The company was founded in 1972 and is headquartered in Chicago, IL.

Adler Planetarium & Astronomy Museum Operates and maintains planetarium and museum. It provides astronomy education for students, adults and families through variety of lectures and special events. The company was founded by Max Adler in 1930 and is headquartered in Chicago, IL.

The Field Museum of Natural History houses biological and anthropological collections of specimens. It supports both informal and more structured public learning through exhibits and educational programs. Its curatorial and scientific staff conducts research on the fields of Anthropology, Biology, Geology, and Zoology. The Field Museum was founded in 1893 and is located in Chicago, Illinois.