Billionaire Profile
Peter Kellogg
Global Rank
#760

Image: Public domain | via Wikimedia Commons

Peter Kellogg

CEO, IAT Reinsurance Co.
US
Real-Time Net Worth
$5.3B
As of December 2025
Age
83
Source
Investments
Industry
finance-investments
Citizenship
US

Biography

Peter Kellogg is an 83-year-old American businessman and philanthropist, best known for his successful career in the finance and investment industry. With a current net worth of $5.3 billion, Kellogg's wealth primarily stems from his investments. His career includes a pivotal role at Spear, Leeds & Kellogg, a Wall Street firm he led, which was later sold to Goldman Sachs. Kellogg is also recognized for his philanthropic contributions, including the preservation of the John F. Peto Studio Museum. He is known for his strategic acumen and leadership within the financial sector.

Wealth Over Time

In-Depth Profile

Early Life

Peter R. Kellogg was born on September 5, 1942. He attended the Rectory School and Berkshire School before matriculating at Babson College, although he dropped out. His father, James Crane Kellogg III, was a prominent figure in the Wall Street firm Spear, Leeds & Kellogg.

Rise to Success

Kellogg's career began in 1967 when he joined his father's firm, Spear, Leeds & Kellogg. He led the company from the 1980s until its sale to Goldman Sachs in 2000 for $6.5 billion. Under his leadership, the firm became the first specialist brokerage to control more than 10% of the stocks trading on the New York Stock Exchange. After selling to Goldman in 2000, Kellogg turned his attention to reinsurance outfit IAT, which he led as CEO until 2015 and still chairs.

Key Business Strategies

Kellogg's key business strategy involved leading Spear, Leeds & Kellogg and later focusing on investments and strategic leadership roles. He has demonstrated exceptional leadership and business acumen throughout his career. His ability to identify and capitalize on market opportunities has contributed to his success.

Philanthropy

Peter Kellogg is involved in philanthropy. He and his wife, through their charitable foundation, purchased and renovated the John F. Peto Studio Museum in Island Heights, NJ, in 2005, spending approximately $2 million. He has also donated more than $4 million to the U.S. ski and snowboarding teams.

Career Milestones

1967

Joined Spear, Leeds & Kellogg

Joined his father's firm.

1980s

Led Spear, Leeds & Kellogg

Became leader of the firm.

2000

Sold Spear, Leeds & Kellogg to Goldman Sachs

Sold the firm for $6.5 billion.

2000

CEO of IAT Reinsurance Co.

Led the reinsurance outfit.

2025

Alnylam Pharmaceuticals Board Member

Joined the board of directors.

Philanthropy & Social Impact

Arts and Culture

John F. Peto Studio Museum

$2M

Purchased and renovated the museum

Sports

U.S. Ski and Snowboarding Teams

$4M+

Donations to support the teams.

Controversies & Challenges

2001

NYSE Accusations

Accused of directing fraudulent wash trades and matched trades, but complaint was dismissed in 2004.

2002

AMEX Fine

Spear, Leeds was fined $1 million by the AMEX for violations.