Julia Flesher Koch, the widow of billionaire industrialist David Koch, is the third-richest woman in the world with an estimated net worth of $84.6 billion, according to Forbes. She inherited her fortune from her husband, who died in August 2019 at age 79. Flesher Koch owns real estate in New York City, Florida, and the Hamptons, and has become a philanthropist who has also ventured into sports ownership.
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