Michael Bloomberg built his fortune after a Wall Street career at Salomon Brothers, using money from that career to launch the financial-information company that became Bloomberg LP in 1981. [1][2]
Wall Street experience becomes a startup
New York City's biographical archive says Bloomberg paid for Johns Hopkins with loans and summer work before joining Salomon Brothers in 1966. He rose from an entry-level Wall Street job into leadership roles in equity trading, sales and information systems, experience that later shaped his idea for a technology-driven financial information business. [1]
When Salomon was acquired in 1981, Bloomberg lost his job and started the company that became Bloomberg LP. Forbes has reported that he used a $10 million Salomon severance package as startup capital, making the business a case of career-earned capital being reinvested into a new company rather than an inherited operating base. [1][2]
Private ownership becomes the wealth engine
The company Bloomberg built combined financial data, software and media around the professional information needs he had seen firsthand on Wall Street. Because the business remained privately held, its expansion created wealth primarily through the value of Bloomberg's ownership rather than through a continuously quoted public share price. [1][2]
That distinction also limits what can be inferred from company-scale estimates: revenue, enterprise value or the value of Bloomberg LP are not the same thing as Bloomberg's liquid personal assets. His fortune is tied to a private ownership interest whose value depends on estimates of the underlying business and the portion attributable to him. [2]
Sources for background
Sources reviewed Sep 15, 2026.
- Michael R. Bloomberg biographical note · City of New York
- What's Up, Mike? · Forbes · Jan 27, 2011
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