David Turner Morgenthaler (August 5, 1919 – June 17, 2016) was an American businessman and capitalist. He founded the venture capital firm Morgenthaler Ventures. He was also important in helping change the U.S. capital gains tax rate from 49% to 28% in 1978 and amending ERISA legislation to allow pension funds to invest in venture capital in 1979. He was born in Chester, South Carolina.