Marilyn Simons Net Worth (2025)
Philanthropist, President of Simons Foundation

Net Worth
Wealth Tier: Billionaire
Net worth between $1 billion and $10 billion
Annual Income
$1M+ annually, mainly from foundation leadership
Net Worth Timeline
2021: $3,000,000,000, 2022: $3,200,000,000, 2023: $3,400,000,000, 2024: $3,500,000,000
Marilyn Simons's Biography
Marilyn Simons is a renowned American philanthropist best known as the co-founder and president of the Simons Foundation, one of the world’s largest charitable organizations supporting research in mathematics and basic sciences. Born on March 15, 1949, Marilyn has played a pivotal role in shaping the foundation’s mission to advance the frontiers of scientific discovery. With a PhD in Economics from Stony Brook University, her expertise and passion for education and philanthropy have made her a respected leader in the nonprofit sector. Marilyn Simons is married to James Simons, legendary mathematician and founder of Renaissance Technologies. The couple has dedicated substantial portions of their wealth to scientific research, education, and social causes, impacting countless lives globally. Marilyn’s leadership at the Simons Foundation has been instrumental in funding groundbreaking research, supporting math and science education initiatives, and fostering a collaborative scientific community. Recognized for her philanthropic vision, Marilyn holds an honorary doctorate and has received multiple awards. Her estimated net worth is $3.5 billion as of 2024. Outside of her professional life, Marilyn enjoys reading, traveling, and supporting the arts, reflecting her belief in the transformative power of education and culture. She is celebrated for her commitment to making a lasting difference in the world through strategic giving and innovative leadership.
Wealth in Perspective
Fun Fact
She is deeply passionate about classical music and often supports music education programs.
Full Name
Marilyn Simons
Nickname
Marilyn
Nationality
American
Birthday
March 15, 1949
Age
76
Zodiac Sign
Pisces
Height
5'5" (165 cm)
Weight
143 lbs (65.0 kg)
Marital Status
Married
Spouse
James Simons
Children
3
Education
PhD in Economics, Stony Brook University
Famous For
Co-founding and leading the Simons Foundation, one of the largest private funders of scientific research
First Big Break
Marriage to James Simons and co-founding the Simons Foundation in the 1990s
Social Media
None public
Businesses Owned
Simons Foundation
Awards
Honorary Doctorate from Stony Brook University; various philanthropy awards
Category
Business
Controversies
None
Hobbies
Reading, supporting the arts, travel
Interests
Science philanthropy, education, mathematics
Quote
"Making a difference in science and education is my life's mission."