Mark M. Harris

Openlands engages in protecting natural and open spaces and surrounding regions to ensure cleaner air and water, protect natural habitats and wildlife and help balance and enrich people's lives. works with groups and individuals in northeastern Illinois to preserve open space, develop walking and biking trails, restore natural areas, and connect people to the outdoors. The company was founded in 1963 and is headquartered in Chicago, IL.

Advocate Aurora Health, Inc. operates hospitals. It specializes in clinical trials, scientific research, primary, women's health, neurological, health and outpatient care, orthopedics, pharmacy, cardiology, oncology, and pediatrics. The company is headquartered in Downers Grove, IL.

Advocate Health Care Network provides hospital healthcare services. It offers advocate heart institute, cancer care, immediate care, brain and spine institute, orthopedics, and women services. The company was founded in 1959 and is headquartered in Downers Grove, IL.