Founded in 1985, Cornerstone Companies is a privately held, fully integrated healthcare real estate firm headquartered in Indianapolis, Indiana. Over its 40-year history, the company has evolved from a regional developer into one of the largest healthcare-focused real estate platforms in the United States. Cornerstone specializes exclusively in medical real estate, offering development, construction, leasing, property management, and investment services tailored to healthcare providers and institutions. Cornerstone’s investment strategy centers on acquiring and developing outpatient medical office buildings (MOBs), ambulatory surgery centers (ASCs), and specialty clinics. The firm operates through a series of private equity vehicles, including its MOB Funds I–IV, which have collectively invested over $84 million in healthcare assets. These funds target stabilized, income-producing properties with long-term leases to creditworthy tenants, often in secondary and tertiary markets with strong healthcare demand. The company’s portfolio is concentrated in Indiana, Ohio, Kentucky, Michigan, and Florida. Top market exposures include Indianapolis, Louisville, and Columbus. Tenant concentration is a strategic feature of Cornerstone’s model. Key tenants include Trinity Health, EyeCare Partners Kentucky, and Urology of Indiana, with some leases exceeding 25 years. These tenants contribute significantly to net effective rent (NER), with EyeCare Partners occupying multiple properties across Kentucky and Indiana.