Background and career
Marijke Elizabeth Mars (born 1965) is an American billionaire heiress and businesswoman. In March 2018 Forbes estimated her net worth to be $5.9 billion. She was ranked as the 30th-richest woman in the world, a position shared with her three sisters. As of February 2026, Forbes estimated her net worth to be $11.4 billion. Marijke Mars is a fourth generation member of the Mars family. Her father was the late Forrest Mars Jr. (1931–2016). She has three sisters: Pamela Mars-Wright, Valerie Mars and Victoria B. Mars. She inherited about an 8 percent stake on Mars Inc. in 2016, which made her a billionaire. According to Forbes, her shares were valued at $5.9 billion (March 2018). She graduated (B.A./B.Sc.) from Duke University. After her graduation she worked as a regional manager for Kal Kan Foods, one of Mars Inc.'s pet food companies. Currently, she works at Mars Food. She married Stephen J. Doyle in 1991, but divorced in 2000.
Sources
Net-worth figure: Celebrity Net Worth (October 2026), in USD. Biography and career facts: the person's Wikipedia article and linked reporting. Snapshot date for all StarWorth figures: 28 October 2026.
