Teresa Heinz Kerry, $750 million
Teresa Heinz Kerry is the widow of ketchup heir John Heinz and the current wife of John Kerry, who ran for office in the 2004 US Presidential election. After Heinz passed, his wealth and leadership duties were passed on to her. She has honorary doctorates from several universities and founded The Heinz Awards program, which celebrates contributions to the environment.
Clare Bronfman, $500 million
Bronfman is the heiress to the Seagram Liquor fortune. Her father was Edgar Bronfman, Sr., who founded the company. She also has a decorated equestrian career, which she took up at age 17.