Saul Phillip Steinberg (August 13, 1939 – December 7, 2012) was an American businessman and financier. He became a millionaire before his 30th birthday and a billionaire before his 40th birthday. He started a computer leasing company (Leasco), which he used in an audacious and successful takeover of the much larger Reliance Insurance Company in 1968. He was best known for his unsuccessful attempts to take over Chemical Bank in 1969 and Walt Disney Productions in 1984.