Billionaire Profile
Marianne Liebmann
Global Rank
#877

Image: Public domain | via Wikimedia Commons

Marianne Liebmann

CEO, Cargill
US
Real-Time Net Worth
$4.6B
As of December 2025
Age
72
Source
Cargill
Industry
food-beverage
Citizenship
US

Biography

Marianne Liebmann, born in 1953, is a prominent American heiress and philanthropist, recognized for her significant stake in Cargill, Inc., the largest privately held corporation in the United States. As the great-granddaughter of Cargill's founder, William Wallace Cargill, she is one of the principal heirs sharing in the family's approximately 90% ownership of the agribusiness giant. Liebmann resides in Bozeman, Montana, and her wealth is primarily derived from dividends from Cargill's performance. She is also dedicated to supporting organizations that aim to make the world a better place.

Wealth Over Time

In-Depth Profile

Early Life

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 company. Growing up in a wealthy family, she had access to quality education and various opportunities.

Rise to Success

Liebmann graduated from Montana State University with a Bachelor of Arts/Science degree. While specific details about her career are limited, it is known that she has held various positions within the Cargill corporation.

Key Business Strategies

Marianne Liebmann's wealth primarily stems from her stake in Cargill. The Cargill-MacMillan family collectively owns approximately 90% of the company, and Liebmann's wealth derives primarily from annual dividends tied to its performance.

Philanthropy

While specific details of Marianne's philanthropic activities are not extensively documented, the Cargill family has a longstanding tradition of philanthropy. The family's charitable contributions have supported various causes, including education, environmental conservation, and community development. She has also dedicated her career to providing robust legal advice to organizations that aim to make the world a better place. She is Legal Counsel for the Clean Air Fund. Additionally, she is a voluntary Director of Lawyers in Charities. In January 2013, she was awarded an OBE (Order of the British Empire) for services to Social Justice through Art Therapy and Mediation.

Career Milestones

1953

Birth

Born in 1953.

Unknown

Graduation

Graduated from Montana State University.

Unknown

Career in Business

Held various positions within the Cargill corporation.

2013

OBE Award

Awarded an OBE (Order of the British Empire) for services to Social Justice through Art Therapy and Mediation.

Philanthropy & Social Impact

Philanthropy

Various Charitable Causes

Unknown

Supports various charitable causes including education, environmental conservation, and community development.

Philanthropy

Legal Counsel for Clean Air Fund

Unknown

Works closely with Clean Air Fund's Senior Leadership Team to ensure compliance with legal and funder obligations.

Philanthropy

Director of Lawyers in Charities

Unknown

Supports lawyers within the charity sector with networking, resources, and training.