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Meyer
Gwendolyn Sontheim Meyer
Rank #679
UNITED STATESfood-beverageCargill

Gwendolyn Sontheim Meyer

Net Worth
$6.017B
0% (24h)
Gwendolyn Sontheim Meyer is an American billionaire heiress and equestrian. As the great-great-granddaughter of William Wallace Cargill, the founder of the renowned Cargill corporation, she inherited a substantial fortune. Her estimated net worth is $6.0 billion as of 2024. Meyer primarily operates in the food and beverage industry. She resides in Rancho Santa Fe, California, and is known for her passion for equestrian sports, particularly show jumping. Meyer has invested heavily in breeding, training, and competing with high-quality sport horses at her Coral Reef Ranch. She has also contributed significantly to philanthropic efforts.

How to read Gwendolyn Sontheim Meyer'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 Gwendolyn Sontheim Meyer, we anchor the narrative to Cargill, Incorporated and Cargill, 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 $6.017B alongside global rank #679, 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

Gwendolyn Sontheim Meyer was born in 1961/62. She is the great-great-granddaughter of William Wallace Cargill, who founded the Cargill corporation in 1865. Her mother was Marion MacMillan Pictet.

Rise to Success

Meyer's wealth stems from her inheritance of an estimated 8% stake in Cargill. Cargill is the largest privately held company in the United States. The company operates worldwide in grain trading, food processing, commodities, and risk management.

Key Business Strategies

While Meyer has not taken a direct corporate role, she focuses on her equestrian pursuits and philanthropy. She is involved in breeding, training, and competing in show jumping events at her ranch, Coral Reef Ranch, in Rancho Santa Fe, California.

Philanthropy

Meyer is involved in philanthropy, with contributions to various causes, including education, conservation, and animal welfare, often reflecting her personal interests and family heritage. She has contributed over $12 million to Democratic-leaning campaigns and organizations, including the 2024 presidential campaign of Vice President Kamala Harris and the Democratic Congressional Campaign Committee (DNCC).

Career Timeline

2011

Won Prix Credit Suisse

Won the Prix Credit Suisse at the Geneva International Horse Show.

Philanthropic Impact

Political Donations$12M+

Democratic Party Campaigns and PACs

Contributed over $12 million to Democratic-leaning campaigns and organizations.

Key Business Ventures & Holdings

CompanyStakeValue
Cargill8.00%$6M

Net Worth History

In-Depth Analysis

Early Life

Gwendolyn Sontheim Meyer was born in 1961/62. She is the great-great-granddaughter of William Wallace Cargill, who founded the Cargill corporation in 1865. Her mother was Marion MacMillan Pictet.

Rise to Success

Meyer's wealth stems from her inheritance of an estimated 8% stake in Cargill. Cargill is the largest privately held company in the United States. The company operates worldwide in grain trading, food processing, commodities, and risk management.

Key Business Strategies

While Meyer has not taken a direct corporate role, she focuses on her equestrian pursuits and philanthropy. She is involved in breeding, training, and competing in show jumping events at her ranch, Coral Reef Ranch, in Rancho Santa Fe, California.

Philanthropy

Meyer is involved in philanthropy, with contributions to various causes, including education, conservation, and animal welfare, often reflecting her personal interests and family heritage. She has contributed over $12 million to Democratic-leaning campaigns and organizations, including the 2024 presidential campaign of Vice President Kamala Harris and the Democratic Congressional Campaign Committee (DNCC).

Data Sources & Methodology

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