Richard Edward Rainwater (June 15, 1944 – September 27, 2015) was an American investor and philanthropist. With an estimated net worth of $3 billion, he ranked 211th on the Forbes 400 in 2015. His investing style was described as "analytically rigorous but opportunistic and Texas-sized in its audacity." Rainwater was a mentor and early backer of investors including Eddie Lampert, Roger Staubach, and David Bonderman. Between 2009 and his death in 2015, he suffered from progressive supranuclear palsy, a rare disease involving neurodegeneration. During his lifetime, Rainwater donated over $380 million to charitable causes and left nearly all of his estate to his charitable foundation. Early life Rainwater grew up in Fort Worth, Texas. Richard Rainwater was born in Fort Worth, Texas, in 1944. He grew up in a family of entrepreneurs and investors, and was exposed to the world of business and finance at an early age. Rainwater's father, Sam, was a successful businessman and investor, who owned a number of companies in the Fort Worth area. From a young age, Rainwater was exposed to the world of business and finance, and learned the value of hard work and determination from his father. His father started off as the owner of a wholesale grocery business and his mother was a clerk at J.C. Penney. He is of Lebanese ancestry. Rainwater graduated from R. L. Paschal High School. In 1963, he was initiated as a member of the Tau chapter of the Kappa Sigma fraternity at the University of Texas at Austin and in 1966, he graduated with a degree in mathematics. In 1996, he was recognized as Kappa Sigma Man of the Year. In 1968, he earned a Master of Business Administration from the Stanford Graduate School of Business. Career From 1968 to 1970, Rainwater worked for Goldman Sachs. In 1970, Sid Bass, a classmate of Rainwater, invited him, then 26 years old, to manage the Bass family investments. From 1970 to July 1986, Rainwater served as the chief investment advisor to the Bass family. He was given $5 million to invest during his first year and managed to lose it all. Rainwater then sought a more methodical investment strategy by studying investors including Warren Buffett, Benjamin Graham, and David Dodd. Rainwater eventually transformed the Bass family fortune from $50 million into $5 billion, amassing $100 million for himself by the time he started investing his own capital in