American businessman James Leininger is the founder of Kinetic Concepts with an estimated net worth of $1.1 billion as of March 2013. He is the 408th richest person in the United States and 1268th in the list of World Billionaires. He was included in the “Forbes 400” list and ranked 375th in 2011.

Born James R. Leininger, he earned his BA in 1965 and MD in 1969 both from Indiana University. He used to serve as an emergency room doctor but has accumulated his estimated net worth of $1.1 billion when he started a healthcare company called Kinetic Concepts (KCI) in 1976. Currently, its major business is focused on wound care products. A consortium of private equity firms by Apax Partners closed on a $6.3 billion acquisition of KCI in November 2012. As the biggest individual shareholder, “Dr. Jim” as he is often called, he sold his stake in the company when Apax took it private. He still serves as its Chairman Emeritus on the Board of Directors.

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Aside from KCI, Leininger is also a co-founder of Renal Care Group and ATX Technologies. He served on the Board of Directors of ATX from 1994. He was a director of the Emergency Department of the Baptist Hospital System in San Antonio. He sits on the Board of Directors of BioNumerik Pharmaceuticals, Spurs Sports & Entertainment, and Texas Commerce Bank. He is a member of the American Medical Association, the Texas Medical Association, and the Institute of American Entrepreneurs. He has investments in real estate and food companies. A basketball enthusiast, he is part-owner of the San Antonio Sports. He was inducted into the Texas Business Hall of Fame in 2007.

James Leininger is a conservative Christian activist. He backs conservative causes and donated to Rick Perry's failed bid during the 2012 Republican presidential nomination. From July to September 2012, he also contributed $5,000 to Donna Campbell, the Tea-Party-backed Texas state senator. He supports school choice and home schooling thus, he and his wife have donated at least $100 million to improve education and provide scholarships.