Susan Thompson Buffett (June 15, 1932 – July 29, 2004) was an American activist for the causes of civil rights, abortion rights and birth control, and the first wife of investor Warren Buffett. She was a director of Berkshire Hathaway, owning 2.2 percent of the company worth about $3 billion at the time of her death, making her the 153rd richest person in the world. She was president of the Buffett Foundation, which has contributed millions of dollars to educational groups, medical research, family planning groups and other charities. Biography Susan was born in Omaha, Nebraska, and graduated from Omaha Central High School. Her father, William Hertzog Thompson, was a minister, psychologist, dean at the University of Nebraska-Omaha, and one-time campaign manager for Howard Buffett. Though her parents and Warren's knew one another, they met at Northwestern University, via Susan's roommate Roberta Buffett, Warren's sister. Susan and Warren married in 1952 at the Dundee Presbyterian Church in Omaha. They had three children together: Susan (born July 30, 1953), Howard (born December 16, 1954), and Peter (born May 4, 1958). She occasionally performed hit classics from the early 1970's cabaret singer and, in 1977, had a one-night performance at an Omaha theater. Encouraged by songwriter/musician Neil Sedaka to pursue a singing career, she left her husband and moved to San Francisco. She started out living in a small apartment in Gramercy Tower on Nob Hill. Later she moved into a large condominium on Broadway near Scott Street in Pacific Heights with views of the Golden Gate Bridge and Alcatraz. She remained married and on good terms with her husband, vacationing together with him and spending time assisting charitable groups. She performed in New York and released several CDs. According to Roger Lowenstein's 1995 Random House biography, Buffett: The Making of an American Capitalist, while Warren had encouraged Susan to pursue her career in music, he was heartbroken by her move. In 1978, Susan introduced her husband to Astrid Menks, who moved in with Warren in their Omaha home, and married him after Susan's death. The Buffetts never divorced and even attended public functions as husband and wife though they hadn't lived together for more than half of their marriage. The Buffetts even signed Christmas cards Warren, Susan, and Astrid and were often seen together as a trio. Oral cancer and death In October 2003, Susan was diagnosed with oral cancer; she