Steve Ballmer
Steve Ballmer is number 129 in the 311 Private Wealth Index, with disclosed holdings in listed companies worth about $1.1bn, mainly in Stagwell Inc. That is about 5,498 times the wealth of a typical US household. Steve Ballmer is a 10% owner of Stagwell Inc.
Part of the 311 Private Wealth Index (311institute.com). Last updated .
Disclosed holdings
| Company | Value | Latest filing | Shares |
|---|---|---|---|
| Stagwell Inc | $1.1bn | 25 April 2025 | 116,044,633 at $9.13 (closing price, 15 October 2026) |
How this figure is calculated
Shares reported in SEC insider filings (Forms 3, 4 and 5), at the latest holding each filing reports, valued at the latest price disclosed in those filings, or at the latest closing price where no recent trade price was filed. Holdings that the filings say belong to investment funds managed by the person are left out, and shares reported jointly by several family members are counted once. Private companies, cash, property and holdings listed outside the United States are not included, so this is a minimum, not total wealth. The household comparison uses $192,700, the median US household wealth in the Federal Reserve Survey of Consumer Finances (2022, the latest published).
Related
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Questions and answers
What is Steve Ballmer's net worth?
Steve Ballmer has disclosed holdings in listed companies worth about $1.1bn, according to the 311 Private Wealth Index. This is a minimum: private companies, cash and property are not included.
How much are Steve Ballmer's disclosed holdings worth?
About $1.1bn in listed companies, ranking Steve Ballmer number 129 in the 311 Private Wealth Index.
Where does Steve Ballmer's wealth come from?
Mainly from holdings in Stagwell Inc. Steve Ballmer is a 10% owner of Stagwell Inc.
Source: SEC insider filings.
© 311 Institute 2026. Facts from official filings and the sources linked on this page. The selection, classification and links are the proprietary work of the 311 Institute, protected by copyright and database rights.