S. Daniel Abraham Net Worth, Relationships, Age/Birthdate & Birthday Facts

S. Daniel Abraham Net Worth, Relationships, Age/Birthdate & Birthday

Bold Summary: S. Daniel Abraham is a self-made American businessman best known for founding the weight-loss brand SlimFast and for his far-reaching philanthropy and efforts toward Middle East peace.

Introduction

Born on August 15, 1924, S. Daniel Abraham embarked on a remarkable journey from modest beginnings to billionaire-status, building an empire around a simple meal-replacement shake and then channeling much of his fortune into global philanthropy and peace initiatives. His estimated net worth stands at approximately $2.4 billion.  Over his lifetime, he has sustained multiple personal relationships and created a legacy that spans business, politics and humanitarianism. In this article we explore his net worth, relationships, age/birthdate, birthday, personal life and enduring influence.

Quick Facts

From Humble Roots to a Global Brand

Growing up in Long Beach, New York, in an Orthodox Jewish household, Abraham was the son of Stella K. and Samuel Abraham.  After serving in the U.S. Army infantry during World War II in Europe, he returned home with an entrepreneurial drive. 
He joined the family business in 1947, when his father’s modest medical-products company was acquired, and then took over leadership, eventually transforming it under the name Thompson Medical Co.. 
In the late 1970s he introduced the SlimFast line — a powdered shake marketed as a convenient weight-loss meal substitute — which became a cultural phenomenon. 

Defining moments in S. Daniel Abraham’s journey include:

• Buying into Thompson Medical Co. in 1947 and steering it into health-and-nutrition products.

• Launching SlimFast in the late 1970s and scaling the brand into the mainstream diet industry.

• Selling SlimFast to Unilever PLC for approximately $2.3 billion in 2000. 

• Founding the S. Daniel Abraham Center for Middle East Peace in 1989 and dedicating his resources to peacebuilding in the Middle East. 

Through these phases, Abraham steadily built not only wealth, but influence, leveraging his business acumen to fund philanthropy and diplomacy.

The Core Pillars of S. Daniel Abraham’s Wealth

The core pillars of Abraham’s wealth include:

• SlimFast and Thompson Medical operations – The foundational business that made his fortune. After launching SlimFast and building its mass-market traction, the sale to Unilever marked the major liquidity event. 

• Investments and holdings – Beyond the sale, Abraham maintained investments and assets, some managed via trusts and family offices. 

• Real estate and personal assets – His residence in Palm Beach, Florida, and other holdings add to the asset base. 

A simplified breakdown:

Relationships & Family Life

Abraham’s personal life is marked by marriage, children, philanthropy and family trust matters.
He first married Estanne Weiner — they had four daughters: Rebecca, Simmi, Leah and Tammy. Their marriage ended in divorce.  Later, Abraham married Ewa Sebzda; they had two children, a daughter Sarah and a son Sam. 
Key insights into his relationships and personal life:

• He kept a relatively low public-profile despite being the founder of a major brand.

• His second marriage linked him to philanthropic and Jewish communal networks.

• Family trust and estate matters surfaced in later years, including a legal dispute involving trust management between him and his daughters. 

• Abraham’s home base was Palm Beach, Florida, though his business and philanthropic reach spanned globally.

Lifestyle, Assets & Interests

Beyond career success, S. Daniel Abraham leads a lifestyle that reflects both passion and purpose, including:

• A residence in Palm Beach, Florida, as his primary home base. 

• A private aircraft and interest in travel, aligning with his global philanthropy and peace missions. (Mentioned in broader profiles.)

• Dedication to art, Judaica and cultural patronage, reflecting his Jewish heritage and philanthropic commitments.

• Significant philanthropy: endowing chairs in nutritional medicine and Middle East policy at major institutions like Harvard Medical School and Princeton University. 

Net Worth Breakdown & Analysis

Abraham’s net worth has been widely reported by Forbes, Bloomberg and other reliable outlets. For example, Forbes listed him as having a net worth of roughly $2.4 billion around April 2025. 
Here’s an overview:

Analysis:

• The bulk of Abraham’s wealth derived from the sale of SlimFast and the founding business operations of Thompson Medical.

• Following the sale, the wealth base has been managed and preserved through investments and assets rather than high-risk ventures.

• He reinvested meaningful portions of his wealth into philanthropic projects, which influences how his net worth is structured and may reduce liquidity.

• Net-worth estimates vary slightly depending on sources — but converge around the $2.4 billion mark.

Public Image, Legacy & Influence

Publicly, Abraham is seen as an exemplar of self-made entrepreneurship turned strategic philanthropy. His influence spans consumer health, diet culture, Jewish communal life and Middle East diplomacy. His founding of the S. Daniel Abraham Center for Middle East Peace has given him a voice in quiet diplomacy and policy forums.
His legacy includes:

• Making diet-shakes mainstream and influencing the weight-loss industry.

• Championing peace efforts between Israelis and Palestinians, leveraging his business credibility for civic impact.

• Supporting higher education and medical research with endowed programs and chairs.

• Being a major political donor, which sparks debate about the role of business-wealth in politics and philanthropy. 

Conclusion

S. Daniel Abraham’s story — born August 15, 1924 — is more than a business success narrative. It is an arc that spans wartime service, entrepreneurial hustle, the creation of a cultural-icon diet brand, and the transformation of wealth into philanthropy and peace-building. With a net worth of approximately $2.4 billion, the man behind SlimFast built far more than a company: he built a legacy rooted in influence and purpose. His birthday — August 15 — marks not only his personal celebration but the beginning of a journey that continues to motivate business founders, philanthropists and peace advocates today.