Humana Inc. (NYSE: HUM) is an American managed health care company that markets and administers health insurance. With a customer base of over 11.1 million in the United States, the company is the largest (by revenues) Fortune 100 company headquartered in the Commonwealth of Kentucky, and has a market cap of over US $13 billion, $36.5 billion in revenue, and over 40,000 employees worldwide. Humana markets its health insurance services in all 50 U.S. states, D.C., and Puerto Rico, and has international business interests in Western Europe and Asia.

The company was founded by David A. Jones, Sr. and Wendell Cherry as a nursing home company in 1961. Then known as Extendicare, the company became the largest nursing home company in the United States.^{[citation needed]} Extendicare later divested the nursing home chain and moved into purchasing hospitals in 1972, becoming the world's largest hospital company in the 1980s.^{[citation needed]}

The corporate name was changed to Humana Inc. in 1974. Humana experienced tremendous growth in the years that followed, both organically and through the takeover of American Medicorp Inc. in 1978, which doubled the company's size.^{[citation needed]} During the mid-1970s, the company used a fast-track construction process to complete and open one hospital a month.^{[citation needed]} This accelerated construction schedule, which compressed time by overlapping processes, allowed Humana to develop hospital projects faster than the industry norm.^{[citation needed]} During this construction boom, Humana developed the double corridor model for hospital construction. This highly efficient design minimized the distance between patients and nurses by placing nursing support services in the interior of the building with patient rooms surrounding the perimeter.^{[citation needed]}