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Billionaire Profile
Winifred J. Marquart
Global Rank
#844

Winifred J. Marquart

CEO, Cleaning products
Virginia Beach, Virginia
Real-Time Net Worth
$5.14B
Estimated based on Cleaning products stock value as of September 10, 2026
0% (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.

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Data Updated
Sep 10, 2026
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Wealth Over Time

Net Worth History

YearNet Worth
2026$5.14B
2025$4.80B
2024$4.80B

Portfolio Holdings

Johnson Outdoors Inc.

Johnson Outdoors Inc.

JOUTmanufacturing
Ownership
5.3%
Market Cap
$540M
Stock Price
$49.79
Revenue
$590M
Racine, WI
1,300 employees
Founded 1970

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.

Billionaires Connected to Winifred J. Marquart

Peers in Manufacturing

All Manufacturing billionaires

Richest in United States

All billionaires from United States

Adjacent Global Ranks

Full global ranking

Frequently Asked Questions

What is Winifred J. Marquart's net worth in 2026?
As of 2026, Winifred J. Marquart's estimated net worth is $5.135 billion, ranking #844 among the world's billionaires. The estimate is based on publicly available shareholding data and market prices, updated daily.
How did Winifred J. Marquart make their money?
Winifred J. Marquart's wealth primarily comes from Cleaning products, most notably through Cleaning products.
Where is Winifred J. Marquart from?
Winifred J. Marquart is from United States.
How old is Winifred J. Marquart?
Winifred J. Marquart is 66 years old.

Sources & References

  1. Winifred J. Marquart — Forbes profile Forbes