BillionaireNet
Marquart
W
Rank #902
UNITED STATESManufacturingCleaning products

Winifred J. Marquart

Net Worth
$4.451B
+0.01% (24h)
Winifred J. Marquart, born in 1958 or 1959, is an American billionaire heir and businesswoman. As the great-great-granddaughter of S.C. Johnson & Son founder Samuel Curtis Johnson Sr., she is an heir to the family-owned cleaning products company, SC Johnson, known for products like Pledge and Windex. Marquart serves as the President of the Johnson Family Foundation, a philanthropic organization focused on community and environmental issues. Her estimated net worth is $4.5 billion as of December 16, 2025.

The Full Dossier

Early Life

Winifred J. Marquart, often referred to as Winnie, was born in either 1958 or 1959. She is the daughter of Samuel Curtis Johnson Jr. and Imogene Powers Johnson, and the great-great-granddaughter of Samuel Curtis Johnson Sr., the founder of SC Johnson & Son. She grew up within a family deeply rooted in the business and philanthropic traditions of SC Johnson.

Rise to Success

Marquart's wealth stems from her inheritance as an heir to the privately held cleaning products company, SC Johnson. While she has never held an executive role within the company, she is actively involved in the family's philanthropic endeavors through the Johnson Family Foundation. Her commitment reflects a dedication to maintaining the family's legacy of giving back to the community.

Key Business Strategies

The SC Johnson company, under the leadership of previous generations, expanded its portfolio through strategic acquisitions, including Drackett (Windex, Drano), DowBrands (Ziploc, Saran), and Method and Ecover. The company has also emphasized ingredient transparency and sustainability.

Philanthropy

Marquart serves as the President of the Johnson Family Foundation. In 2017, she and her siblings pledged $150 million to Cornell University to establish the SC Johnson College of Business. This gift reflects a commitment to education, innovation, and leadership development. The foundation focuses on community and environmental issues.

Career Timeline

2017

Pledged $150 Million to Cornell

Winifred and her siblings pledged $150 million to Cornell University to fund the SC Johnson College of Business.

Philanthropic Impact

Education$150M

SC Johnson College of Business

Pledge to Cornell University

Wealth Trajectory