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Liebmann
Marianne Liebmann
Rank #753
UNITED STATES•food-beverage•Cargill

Marianne Liebmann

Net Worth
$5.44B
0% (24h)
Marianne Liebmann, born in 1953, is an American billionaire heiress and philanthropist. As a great-granddaughter of William Wallace Cargill, the founder of Cargill, she is one of the principal heirs to the privately-held Cargill, Inc.. With a Bachelor of Arts degree from Montana State University, Liebmann has dedicated her career to providing legal advice to organizations working to improve the world. She has over 20 years of professional legal experience within the international NGO and UK charity sectors, focusing on areas like sexual and reproductive health, children and youth development, and international animal welfare. Her net worth is estimated at $5.4 billion as of 2024.

How to read Marianne Liebmann'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 Marianne Liebmann, 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 $5.44B alongside global rank #753, 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 and Education

Marianne Cargill Liebmann was born in 1953. She is the great-granddaughter of William Wallace Cargill, who founded Cargill, Inc. in 1865 as a grain storage business. She is the daughter of James R. Cargill and Mary Janet Morse Cargill. She graduated from Montana State University with a Bachelor of Arts degree.

Rise to Success

Liebmann is one of twelve principal heirs to Cargill, Inc.. Her wealth derives primarily from her stake in Cargill, a privately-held company, and annual dividends tied to its performance. The Cargill-MacMillan family collectively owns approximately 90% of the company. She inherited her ownership stake in Cargill Inc. upon the death of her father, James R. Cargill, in 2006.

Career and Philanthropy

Beyond her role as an heiress, Marianne has dedicated her career to providing robust legal advice to organizations that aim to make the world a better place. With over 20 years of professional legal experience, primarily within the international NGO and UK charity sectors, she has worked in areas such as sexual and reproductive health, children and youth development, emergency response, education, and international animal welfare. She serves as Legal Counsel for the Clean Air Fund.

Family and Personal Life

Liebmann resides in Bozeman, Montana and is married with two children. She is known for leading a relatively private life.

Career Timeline

Present

Legal Counsel

Serves as Legal Counsel for the Clean Air Fund.

2006

Inheritance

Inherited her ownership stake in Cargill Inc. upon the death of her father, James R. Cargill.

1990s

Director

Served as a director of Cargill, Incorporated.

1970s

Education

Graduated from Montana State University with a Bachelor of Arts degree.

Key Business Ventures & Holdings

CompanyStakeValue
Cargill——

Net Worth History

In-Depth Analysis

Early Life and Education

Marianne Cargill Liebmann was born in 1953. She is the great-granddaughter of William Wallace Cargill, who founded Cargill, Inc. in 1865 as a grain storage business. She is the daughter of James R. Cargill and Mary Janet Morse Cargill. She graduated from Montana State University with a Bachelor of Arts degree.

Rise to Success

Liebmann is one of twelve principal heirs to Cargill, Inc.. Her wealth derives primarily from her stake in Cargill, a privately-held company, and annual dividends tied to its performance. The Cargill-MacMillan family collectively owns approximately 90% of the company. She inherited her ownership stake in Cargill Inc. upon the death of her father, James R. Cargill, in 2006.

Career and Philanthropy

Beyond her role as an heiress, Marianne has dedicated her career to providing robust legal advice to organizations that aim to make the world a better place. With over 20 years of professional legal experience, primarily within the international NGO and UK charity sectors, she has worked in areas such as sexual and reproductive health, children and youth development, emergency response, education, and international animal welfare. She serves as Legal Counsel for the Clean Air Fund.

Family and Personal Life

Liebmann resides in Bozeman, Montana and is married with two children. She is known for leading a relatively private life.

Data Sources & Methodology

Figures for Marianne Liebmann 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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