Meet Julia Flesher Koch, the billionaire philanthropist who's one of the world's richest women

• Julia Flesher Koch is the third-richest woman globally, with an estimated $84.6 billion net worth.
• Flesher Koch owns real estate in New York City, Florida, and the Hamptons.
• A longtime philanthropist, she has also ventured into sports ownership.

Julia Koch still has a residence in Palm Beach. The Wall Street Journal reported in 2026 that she was the wealthiest property owner in the town.

Flesher Koch is the president of the David H. Koch Foundation, which funds science and medical research, education, and the arts.

Through the David H. Koch Charitable Foundation and personal giving, the couple had donated more than $1.3 billion, according to the Julia Koch Family Foundation website.

Flesher Koch remains president of the David H. Koch Foundation, according to its latest tax filing for 2024.

She sits on the boards of Koch, Inc., Memorial Sloan Kettering Cancer Center, The Metropolitan Museum of Art, and Venetian Heritage.

Flesher Koch has also donated to NYU and NYU Langone Health. She gave $3 million to establish an endowed professorship in orthopedic surgery and $1.4 million to create an endowed scholarship that covers the full tuition of at least one medical student at a time.

In 2023, Flesher Koch set up the Julia Koch Family Foundation.

Julia Koch is the founder and chair of the foundation. The foundation has committed $75 million to an NYU Langone ambulatory-care center in West Palm Beach, pledged $50 million to The Metropolitan Museum of Art, and made grants to several Brooklyn nonprofits.”

In 2024, Julia Koch and her children purchased a 15% stake in BSE Global.

BSE Global owns the Brooklyn Nets, New York Liberty, and the Barclays Center.

Forbes reported that the deal was worth almost $700 million.

In 2025, Flesher Koch and her children acquired 10% of the NFL’s New York Giants.

The deal valued the team at over $10 billion, according to Forbes.

“My family and I are honored to join the Giants organization, a storied franchise with deep roots in New York,” Julia Flesher Koch said in a New York Giants press release announcing the deal.