Duncan MacMillan
Princeton, New Jersey
United States
Bloomberg LP, Self Made
$1,300,000,000
1941
#1941 Billionaires 2019
Duncan MacMillan cofounded financial data and media company Bloomberg LP in 1981 with Mike Bloomberg, Thomas Secunda and Charles Zegar.MacMillan left a job at investment bank Salomon Brothers to help Bloomberg with what was then called Innovative Market Systems. He is credited with designing many of Bloomberg LP's computer systems.Bloomberg LP, where MacMillan still works in the engineering department, has revenues estimated at $9.6 billion and 19,000 global employees.
An active philanthropist, MacMillan has signed the Giving Pledge, a promise to give at least half of his fortune to charitable causes. MacMillan served four years in the Marine Corps after graduating from high school. He graduated from Rutgers University in 1966.
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