Pauline MacMillan Keinath

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Born
Pauline MacMillan

(1934-07-31) July 31, 1934 (age 91)
Hennepin County, Minnesota, US
OccupationHeiress
Knownfor9% stake in Cargill
SpouseMarried
Pauline MacMillan Keinath
Born
Pauline MacMillan

(1934-07-31) July 31, 1934 (age 91)
Hennepin County, Minnesota, US
OccupationHeiress
Known for9% stake in Cargill
SpouseMarried
Children4
RelativesWilliam Wallace Cargill (great-grandfather)
Cargill MacMillan Jr. (brother)
Whitney MacMillan (brother)

Pauline MacMillan Keinath (born July 31, 1934, in Hennepin County, Minnesota) is an American billionaire heiress. She is believed to be the largest individual shareholder in Cargill.[1]

As of March 2026, she had a net worth of $9.5 billion from an inherited 9% stake in Cargill.[2]

In 2014, she was the 16th richest woman in the US.[2] In 2022, her wealth made her the richest person in Missouri.[3]

Family

She is a great-granddaughter of William Wallace Cargill, the founder of Cargill, the largest private company in the US. Her father was Cargill MacMillan Sr. (1900–1968). She has two siblings, Whitney MacMillan (1929–2020) and Cargill MacMillan.[4]

She is married, with four children, and lives in St. Louis, Missouri.[2]

Political involvement

References

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