Sandy Weill is a name that has long echoed through the halls of Wall Street. As the former CEO and chairman of Citigroup, Weill played a major role in shaping modern banking — and in 2025, the billionaire is making headlines once again.
Now in his late 80s, Weill has shifted his focus from finance to philanthropy, recently donating a staggering $50 million to launch a new cancer research hub with Princeton University.
Here’s everything to know about Sandy Weill in 2025 — from his net worth to his powerful legacy.
Who is Sandy Weill?
Sanford I. “Sandy” Weill, born March 16, 1933, in Brooklyn, New York, is an American banker, financier, and philanthropist.
He’s best known for building Citigroup into one of the largest financial institutions in the world through a series of high-profile mergers — including the historic union of Citicorp and Travelers Group in 1998.
Weill retired as CEO in 2003 and stepped down as chairman in 2006, but his influence on global finance continues to be studied and debated to this day.
What is Sandy Weill’s net worth in 2025?
As of 2025, Sandy Weill has an estimated net worth of $1 billion, according to Celebrity Net Worth.
Most of his wealth was accumulated during his decades-long career in finance, particularly from his leadership at Citigroup and various board positions.
He has since invested significantly in real estate, private equity, and philanthropic ventures with his wife, Joan Weill.
Despite stepping away from day-to-day business years ago, Weill’s investment portfolio and legacy holdings continue to contribute to his billionaire status.
What is Sandy Weill doing in 2025?
In March 2025, Sandy Weill made waves in the medical world with a $50 million donation to Princeton University, establishing a new cancer research hub focused on accelerating treatments and bridging gaps between research and clinical application.
According to Bloomberg, the initiative will connect leading scientists and physicians in a cross-disciplinary environment designed to innovate cancer therapy.
The hub will be known as the Weill Cancer Discovery Institute, and is already being hailed as a potential game-changer in the field.
In a statement shared by CNBC, Weill said, “This is about investing in hope, science, and the future of medicine.”
What is Sandy Weill known for in the business world?
Weill’s name is synonymous with the rise of the modern megabank.
He started his career as a runner on Wall Street, eventually founding Shearson Loeb Rhoades, and later leading the creation of Citigroup.
He was instrumental in pushing the boundaries of the Glass-Steagall Act, which once separated commercial and investment banking — and his actions helped redefine U.S. banking regulation for a new era.
Though his legacy is not without controversy, Weill is credited with building one of the most powerful financial empires in history.
Is Sandy Weill still involved in philanthropy?
Absolutely. Philanthropy has become his primary focus in recent years.
Alongside his wife Joan, Weill has donated hundreds of millions to causes like education, medical research, and the arts.
Some of the most notable institutions to benefit from the Weills include:
- Weill Cornell Medical College
- Carnegie Hall
- Sonoma State University
- And now, the Weill Cancer Discovery Institute at Princeton
His efforts have earned him numerous honors and a reputation as one of the most generous financiers-turned-philanthropists in the world.