Duncan MacMillan
$1.83B
as of 03/13/26
About Duncan MacMillan
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 has estimated revenues of nearly $15 billion.
Personal stats
Citizenship
United States of AmericaSource of wealth
Bloomberg LPResidence
Princeton, New JerseyMarital status
MarriedBirth date
12/17/37 (age 88)Number of children
2Self-made
self-madeDuncan MacMillan’s fortune is worth
31K
troy ounces of gold
28K
median U.S. household
18K
median U.S. income
0.037%
U.S. credit card volume
0.007%
GDP of the United States
0.005%
United States debt
Net worth history
Annual ranking
Did you know?
MacMillan served four years in the Marine Corps after graduating from high school. He graduated from Rutgers University in 1966.
Net worth over time
Real-time ranking
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