Peter Kellogg’s net worth over time
Only dates with a published estimate are shown. Nothing is filled in between. Tap or hover a bar to see the source.
See the numbers as a table
| Date | Estimate | Source |
| 2019 | $3.4 billion | Forbes World's Billionaires List 2019 |
| 2020 | $2.7 billion | Forbes World's Billionaires List 2020 |
| 2021 | $3.6 billion | Forbes World's Billionaires List 2021 |
| 2022 | $3.6 billion | Forbes World's Billionaires List 2022 |
| 2023 | $3.6 billion | Forbes World's Billionaires List 2023 |
| 2024 | $4.2 billion | Forbes World's Billionaires List 2024 |
| 2025 | $4.7 billion | Forbes World's Billionaires List 2025 |
| 2026 | $5.4 billion | Forbes World's Billionaires List 2026 |
| Oct 2026 | $5.8 billion | Forbes Real-Time Billionaires · Forbes real-time estimate |
Where the money comes from
These are the main sources of wealth named in the reporting we cite. No published source breaks the total into exact amounts, so we do not show percentages.
Peter Kellogg’s fortune in real-life terms
Based on the Forbes Real-Time Billionaires estimate above. Median full-time U.S. pay is $65,416 a year ($1,258 a week, BLS, Q2 2026), before taxes. Typical (median) U.S. family net worth is $216,100 (Federal Reserve, 2025 Survey of Consumer Finances).
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Peter Kellogg has an estimated net worth of $5.8 billion, according to Forbes Real-Time Billionaires, Peter Kellogg profile (figures as of October 20, 2026). That is up from $3.4 billion in 2019.
Peter Kellogg is an American businessman best known for leading Spear, Leeds & Kellogg, a Wall Street brokerage with deep family ties. His father was a partner at the firm, and Kellogg joined it in 1973. Several years later, he took over. During his time in charge, the company became the first specialist brokerage to handle more than 10% of the stocks trading on the New York Stock Exchange.
His wealth comes from finance and investments. A major turning point came in 2000, when Goldman Sachs bought Spear, Leeds & Kellogg for $6.5 billion in cash and stock. After that sale, Kellogg shifted his focus to IAT, a reinsurance company he later led as CEO until 2015 and still chairs. Forbes put his net worth at $5.8 billion on its real-time billionaires tracker as of October 20, 2026.
How Peter Kellogg built his fortune
Kellogg made his name in the brokerage business. He joined Spear, Leeds & Kellogg in 1973, at a firm where his father was already a partner, and took control several years later. Under his leadership, the business grew into a major specialist brokerage on the New York Stock Exchange. It became the first firm in that niche to control more than 10% of the stocks trading there, giving it a powerful position in market making.
The biggest money event in his career came in 2000, when Goldman Sachs bought Spear, Leeds & Kellogg for $6.5 billion in cash and stock. After the deal, Kellogg turned to insurance through IAT. He later served as CEO of the reinsurance company until 2015 and remains its chair. Forbes places him in Finance & Investments and ties his wealth to investments rather than a single current operating role.
What Forbes says about his net worth
Forbes has tracked Kellogg's fortune across several years. It estimated his wealth at $3.4 billion in 2019, then $2.7 billion in 2020. The next year, Forbes put him at $3.6 billion, and it kept that same estimate in 2022 and 2023. Those figures fit a fortune rooted in finance, where the value of holdings can move over time even after the main business sale is long finished.
In more recent years, the Forbes estimate moved higher. It rose to $4.2 billion in 2024 and $4.7 billion in 2025. Forbes then estimated $5.4 billion in 2026 on its annual billionaires list. On the real-time tracker, Forbes showed $5.8 billion in October 2026. Beyond business, Kellogg has also given more than $4 million to the U.S. ski and snowboarding teams.
Career and money timeline
- 1973
He joined Spear, Leeds & Kellogg, where his father was a partner.
- 2000
Goldman Sachs bought Spear, Leeds & Kellogg for $6.5 billion in cash and stock.
- 2015
He led IAT as CEO until 2015 and stayed on as chair.
- 2024
Forbes estimated his net worth at $4.2 billion.
- 2026
Forbes showed his fortune at $5.8 billion on its real-time tracker in October 2026.
Peter Kellogg net worth FAQ
What is Peter Kellogg's net worth?
Peter Kellogg's net worth is an estimated $5.8 billion, according to Forbes Real-Time Billionaires, Peter Kellogg profile (October 20, 2026). It is an estimate, not an official figure.
How did Peter Kellogg get so rich?
The main sources named in the reporting we cite are: Investments.
Is Peter Kellogg a billionaire?
Yes. Forbes Real-Time Billionaires estimates Peter Kellogg is worth $5.8 billion.
How has Peter Kellogg's net worth changed?
The earliest published estimate we track is $3.4 billion (2019, Forbes World's Billionaires List 2019). The latest is $5.8 billion (October 20, 2026).
What company made Peter Kellogg rich?
Spear, Leeds & Kellogg was the key company in his career. Its 2000 sale to Goldman Sachs for $6.5 billion was the biggest money event tied to his wealth.
What does Peter Kellogg do after the Goldman Sachs sale?
After 2000, he focused on IAT, a reinsurance business. He served as CEO until 2015 and still chairs the company.
Sources
- Forbes Real-Time Billionaires, Peter Kellogg profile (October 20, 2026)
- Forbes World's Billionaires List 2019, Peter Kellogg profile (March 5, 2019)
- Forbes World's Billionaires List 2020, Peter Kellogg profile (April 8, 2020)
- Forbes World's Billionaires List 2021, Peter Kellogg profile (April 6, 2021)
- Forbes World's Billionaires List 2022, Peter Kellogg profile (April 5, 2022)
- Forbes World's Billionaires List 2023, Peter Kellogg profile (April 4, 2023)
- Forbes World's Billionaires List 2024, Peter Kellogg profile (April 2, 2024)
- Forbes World's Billionaires List 2025, Peter Kellogg profile (April 2025)
- Forbes World's Billionaires List 2026, Peter Kellogg profile (March 10, 2026)
- U.S. Bureau of Labor Statistics, Usual Weekly Earnings (Q2 2026) (July 2026)
- Federal Reserve, 2025 Survey of Consumer Finances (median family net worth, Table 4) (October 2026)
- Background facts: Wikipedia, Peter Kellogg (accessed October 23, 2026). Used for career facts only, never for figures.
Every number on this page is an estimate published by the source named next to it. We never fill in years with our own guesses. How we handle estimates.