John Mars

John Mars

Mars, Inc. heir and co-owner · Updated 14 Nov 2026

John Mars, 91, owns about a third of Mars, Inc. and was worth $50.4 billion on Forbes' real-time list on 12 November 2026 4.

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QUICK FACTS
Full nameJohn Franklyn Mars
Born15 October 1935
Age91 (November 2026)
ParentsForrest Mars Sr. and Audrey Ruth Meyer
SpouseAdrienne Bevis (married 1958)
ChildrenThree
RoleCo-owner of Mars, Inc.
Net worthAbout $50.4 billion (Forbes, 12 November 2026)
01 · Biography

Who is John Mars?

John Mars is the son of Forrest Mars Sr. and a co-owner of Mars, Incorporated, the maker of Snickers, M&Ms and Milky Way and a large pet-care business. Forbes valued him at about $50.4 billion on its real-time list on 12 November 2026, tied with his sister Jacqueline Mars at 35th in the world 4.

How did John Mars make his money?

He inherited a stake in the family company. His grandfather Frank C. Mars founded it, and his father, Forrest Mars Sr., built it into a global business and turned control over to his three children, Forrest Jr., John and Jacqueline. Forbes estimates that John and Jacqueline each own about a third of Mars, and the four daughters of Forrest Jr., who died in 2016, hold most of the rest 123.

Early life

John Franklyn Mars was born on 15 October 1935, a son of Forrest E. Mars Sr. and Audrey Ruth Meyer. His brother Forrest Jr. was born in 1931 and his sister Jacqueline in 1939 1.

Family

He married Adrienne Bevis in June 1958, and they have three children 15. Read John Mars’s family.

The Mars family fortune

Forbes values the whole Mars family at about $129 billion, the third richest family in the United States after the Waltons and the Kochs. Mars, Inc. is among the largest private companies in the country 36.

John Mars net worth

Forbes put him at about $50.4 billion on 12 November 2026, about ₹4.7 lakh crore at ₹94 to the dollar 4. See John Mars net worth and our ranking of the top 50 richest people in the world.

In this profile · 6 pages

Everything about John Mars

Net worth1 min$50.4 billion from a third of Mars, Inc.Read net worth → Biography1 minBorn in 1935 into the Mars family, co-owner of Mars, Inc.Read biography → Family1 minMarried to Adrienne since 1958, three children and a sister, Jacqueline.Read family → Companies1 minAbout a third of privately held Mars, Inc.Read companies → Lifestyle1 minA very low public profile.Read lifestyle → Timeline1 min1935 birth, 1958 marriage and a third of Mars, Inc.Read timeline →
02 · Timeline

Career timelineCareer at a glance

Full timeline
  1. 1935BORNBorn, a son of Forrest and Audrey Mars
  2. 1958MILESTONEMarries Adrienne Bevis
  3. 1999MILESTONEHis father Forrest Mars Sr. dies
  4. 2016MILESTONEHis brother Forrest Mars Jr. dies
  5. 2026MILESTONERanked 35th with $50.4 billion
06 · FAQ

Questions people ask

John Mars is a co-owner of Mars, Inc. and the son of Forrest Mars Sr. He is one of the richest people in the world.
He was born on 15 October 1935, so he is 91 in November 2026.
About $50.4 billion on Forbes' real-time list on 12 November 2026.
He inherited a stake in Mars, Inc. and owns about a third of it with his sister Jacqueline.
Sources Last verified 14 Nov 2026
  1. 1Wikipedia, Mars family, 1 Jan 1970, Birth
  2. 2BillionaireTracker, Real-Time Billionaires List, 12 Nov 2026, Forbes real-time
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