NetWorth
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Marquart
W
Rank #935
UNITED STATES•Manufacturing•Cleaning products

Winifred J. Marquart

Net Worth
$4.478B
-0.01% (24h)
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.

How to read Winifred J. Marquart's profile

Public net-worth figures are estimates. They combine observable inputs—typically listed equity, disclosed transactions, and market prices—with editorial judgment where filings are incomplete (for example, private holdings, debt, or cross-holdings). For Winifred J. Marquart, we anchor the narrative to Cleaning products and Cleaning products, then update the headline number as markets move. The chart on this page is meant to show trajectory, not a certified balance sheet.

When you see $4.478B alongside global rank #935, interpret it as our best synthesis of widely cited ownership and price signals—not a claim about cash on hand. Estimates can diverge from other publishers because of different treatment of options, trusts, charitable vehicles, or illiquid assets. We document the general approach in methodology and welcome corrections via corrections.

Country (UNITED STATES) and career milestones on this page are curated for reader context; they should be verified against primary sources when used for research. Editorial metadata for this profile is refreshed on a rolling basis, with deeper audits at least annually (last noted cycle: 2026).

Looking for depth? When available, the dossier and timeline sections below add long-form context beyond the headline number—prioritize those modules when evaluating claims about strategy, controversies, or philanthropic commitments.

The Full Dossier

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 Timeline

2017

Cornell University Pledge

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

2004

President of the Johnson Family Foundation

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

Philanthropic Impact

Education$150M

Cornell University Gift

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

Key Business Ventures & Holdings

CompanyStakeValue
Johnson Outdoors Inc.5.30%—

Net Worth History

In-Depth Analysis

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.

Data Sources & Methodology

Figures for Winifred J. Marquart are synthesized from the sources below and cross-checked against our net worth methodology. Estimates may lag market moves; see corrections to report discrepancies.

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