Billionaire Profile
W
Global Rank
#962

Image: Neumann, Angelo, 1838-1910 Livermore, Edith | Public domain | via Wikimedia Commons

Winifred J. Marquart

CEO, Cleaning products
UNITED STATES
Real-Time Net Worth
$4.435B
Estimated based on Cleaning products stock value as of April 20, 2026
+0.01% (24h)
Age
66
Source
Cleaning products
Industry
Manufacturing
Citizenship
UNITED STATES

Biography

Winifred J. Marquart, a US citizen, is an American billionaire businesswoman and philanthropist. As the great-great-granddaughter of SC Johnson's founder, Samuel Curtis Johnson Sr., she inherited a significant stake in the privately held cleaning products company, SC Johnson, known for brands such as Windex and Pledge. Marquart currently serves as President of the Johnson Family Foundation, where she oversees initiatives focused on fostering community and facilitating meaningful connections. Her net worth is estimated at $4.8 billion as of March 2026, solidifying her position among the world's wealthiest individuals. This wealth is primarily derived from her ownership in SC Johnson, reflecting the family's long-standing legacy and business acumen.

Fact Checked
Verified by Editorial Team
Live Data
Updated 4/20/2026

Wealth Over Time

In-Depth Profile

Early Life

Winifred "Winnie" Johnson-Marquart was born in 1959 in Racine, Wisconsin. She is the daughter of Samuel Curtis Johnson Jr., who served as the chairman and CEO of SC Johnson from 1965 to 2004, and Imogene Powers Johnson, a philanthropist. Her early life was rooted in the family's business legacy, growing up in an environment closely tied to the privately held company founded by her great-great-grandfather, Samuel Curtis Johnson Sr..

Rise to Success

Marquart's wealth stems from her inheritance as a fifth-generation member of the SC Johnson family. The company, founded in 1886, evolved from a parquet flooring business into a global enterprise. As a shareholder, she benefits from the company's success and revenue, which was approximately $10.5 billion in 2023. While her brother, H. Fisk Johnson, currently serves as the chairman and CEO of SC Johnson, Winifred has focused on philanthropic endeavors.

Key Business Strategies

Winifred J. Marquart has not held any executive roles within SC Johnson. Her primary focus has been on philanthropy. The SC Johnson company has continued to grow and diversify. SC Johnson has expanded its cleaning products portfolio through acquisitions, including Drackett (Windex, Drāno), DowBrands (Ziploc, Saran, Fantastik, Scrubbing Bubbles), Method, and Ecover.

Philanthropy

Marquart serves as the President of the Johnson Family Foundation. The foundation is dedicated to community-building and facilitates dialogue on important issues. She has been involved in several philanthropic initiatives, including the 2017 pledge of $150 million to Cornell University to establish the SC Johnson College of Business. This gift helped integrate several schools within Cornell, supporting faculty, student programs, and innovative curricula.

Career Milestones

2004

President of the Johnson Family Foundation

Became President and Trustee of the Johnson Family Foundation, following a family restructuring.

2017

Cornell University Pledge

Participated in a $150 million pledge to Cornell University to establish the SC Johnson College of Business.

Philanthropy & Social Impact

Education

Cornell University Gift

$150M

Contributed to establishing the SC Johnson College of Business at Cornell University, supporting faculty, programs, and curricula.