LeaderPortfolio
MacMillan
Martha MacMillan
Rank #2341
UNITED STATESfood-beverageCargill

Martha MacMillan

Net Worth
$1.758B
0% (24h)
Martha MacMillan, born in 1951, is one of the 21 billionaire heirs to Cargill, the world's largest privately held agricultural business. Her great-great-grandfather founded the company in 1865 as a single grain warehouse. Today, the Cargill-MacMillan family collectively owns approximately 88% of Cargill. With a net worth of $1.7 billion as of March 25, 2026, Martha MacMillan is actively involved in philanthropy through the Martha Elizabeth MacMillan Foundation. The foundation focuses on international humanitarian relief, poverty alleviation, and local health initiatives.

The Full Dossier

Early Life

Martha MacMillan is a member of the MacMillan family, who have been involved with Cargill for generations. Her great-great-grandfather, W.W. Cargill, founded the company in 1865. Growing up, she was exposed to the global nature of the family business.

Rise to Success

Martha MacMillan inherited her stake in Cargill, one of the world's largest privately held companies. The family has consistently maintained a significant ownership in the company, allowing for long-term strategic investments. She does not have an active role in the daily operations of the company. Her wealth stems from the family's long-standing ownership of Cargill, which has grown into a global giant with operations in food, agriculture, and industrial sectors.

Key Business Strategies

Cargill's success is rooted in its ability to adapt to changing markets and its commitment to remaining a privately held company. This structure allows Cargill to focus on long-term growth without the pressure of quarterly earnings reports. The company reinvests a significant portion of its earnings back into the business. Cargill has also expanded its global presence, with new facilities and sustainability initiatives.

Philanthropy

Martha MacMillan is actively involved in philanthropy through the Martha Elizabeth MacMillan Foundation. The foundation focuses on international humanitarian relief and poverty alleviation. The Martha Elizabeth MacMillan Foundation is based in Minneapolis, Minnesota. The foundation has assets of $15.6 million and focuses on large grants to established organizations. The foundation supports initiatives in several US cities and states, including Minnesota, Illinois, and New York.

Philanthropic Impact

Humanitarian Aid$1.4B

International Humanitarian Relief

Focuses on global poverty reduction via microfinance and economic empowerment.

Philanthropy$1.4B

Immigrant recognition and heritage

Supports immigrant recognition and heritage programs.

Healthcare$1.4B

Local Health System Support

Supports local health system support in Minnesota (Alina Health Foundation).

Wealth Trajectory