David Koch Net Worth: David Koch is an American businessman who has a net worth of $40 billion dollars. David Koch was born May 3, 1940 in Wichita, Kansas. He is co-owner of Koch Industries, along with older brother Charles Koch, and serves as executive vice president. Originally engaged solely in oil refining and chemicals, Koch Industries now deals also in process and pollution control equipment and technologies; polymers and fibers; minerals; fertilizers; commodity trading and services; forest and consumer products; ranching. It also produces a wide variety of well-known brands, such as Stainmaster carpet, the Lycra brand of spandex fiber, Quilted Northern tissue and Dixie Cup. In 2012, a series of web videos was compiled into the film Koch Brothers Exposed, accusing Koch Industries of environmental and political misdeeds. Koch Industries is the second-largest privately held company by revenue in the United States, according to a 2010 Forbes survey. David Koch has contributed to charities such as Lincoln Center, Sloan Kettering, a fertility clinic at New York-Presbyterian Hospital and the American Museum of Natural History's David H. Koch Dinosaur Wing. The New York State Theater at Lincoln Center, home of the New York City Ballet, was even renamed the David H. Koch Theater in 2008, following a gift of 100 million dollars for the renovation of the theater. Condé Nast Portfolio described David Koch as "one of the most generous but low-key philanthropists in America." David and his brother Charles have also been known to donate to political advocacy groups, including Americans for Prosperity and to political campaigns, mainly Republican. David Koch is a survivor of the US Air Flight 1493 crash in 1991.