NetWorth
LeaderPortfolio
MacMillan
Sarah MacMillan
Rank #1586
UNITED STATES•food-beverage•Cargill

Sarah MacMillan

Net Worth
$2.593B
0% (24h)
Sarah MacMillan, born in 1953, is an American heiress and a major shareholder in Cargill, the largest private company in the United States. Her estimated net worth is $2.6 billion as of March 2026. She inherited her wealth from her father, W. Duncan MacMillan, who died in 2006. MacMillan is one of several family members who collectively own a significant portion of Cargill. Her career has been largely private, with no known involvement in Cargill's day-to-day operations. The company, founded in 1865, operates in the food and agriculture industries, generating $154 billion in revenue in 2025.

How to read Sarah MacMillan'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 Sarah MacMillan, 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 $2.593B alongside global rank #1586, 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

Sarah MacMillan was born in 1953, one of the many descendants of William Wallace Cargill, who founded Cargill in 1865. The Cargill-MacMillan family has a long history in the agricultural and food industries. Sarah inherited her stake in Cargill from her father, W. Duncan MacMillan, who died in 2006.

Rise to Success

Sarah MacMillan's wealth stems from her inheritance of a stake in Cargill, the largest private company in the United States. The company has grown from a single grain warehouse to a global leader in food, agriculture, financial, and industrial products and services. The family's involvement in Cargill has spanned over 140 years. Sarah, along with other family members, holds a significant portion of the company.

Key Business Strategies

Cargill's success is built on its diversified business model and global presence. The company has expanded through acquisitions, partnerships, and a focus on innovation. While Sarah MacMillan isn't directly involved in the company's operations, her wealth reflects Cargill's overall performance and strategic decisions.

Philanthropy

Information on Sarah MacMillan's specific philanthropic activities is not readily available through search results. However, the Cargill company itself engages in philanthropy, contributing to various initiatives. Details on her personal contributions could not be determined with the available information.

Key Business Ventures & Holdings

CompanyStakeValue
Cargill3.00%—

Net Worth History

In-Depth Analysis

Early Life

Sarah MacMillan was born in 1953, one of the many descendants of William Wallace Cargill, who founded Cargill in 1865. The Cargill-MacMillan family has a long history in the agricultural and food industries. Sarah inherited her stake in Cargill from her father, W. Duncan MacMillan, who died in 2006.

Rise to Success

Sarah MacMillan's wealth stems from her inheritance of a stake in Cargill, the largest private company in the United States. The company has grown from a single grain warehouse to a global leader in food, agriculture, financial, and industrial products and services. The family's involvement in Cargill has spanned over 140 years. Sarah, along with other family members, holds a significant portion of the company.

Key Business Strategies

Cargill's success is built on its diversified business model and global presence. The company has expanded through acquisitions, partnerships, and a focus on innovation. While Sarah MacMillan isn't directly involved in the company's operations, her wealth reflects Cargill's overall performance and strategic decisions.

Philanthropy

Information on Sarah MacMillan's specific philanthropic activities is not readily available through search results. However, the Cargill company itself engages in philanthropy, contributing to various initiatives. Details on her personal contributions could not be determined with the available information.

Data Sources & Methodology

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

You may also like

HubAll BillionairesHubGlobal RankingsHubNewsroom