Bloomberg Billionaires Index

View profiles for each of the world’s 500 richest people, see the biggest movers, and compare fortunes or track returns.

#517 Clay Mathile $3.83B

Random fact: Autobiography is titled "Dream No Little Dreams."


Mathile sold Iams to Procter and Gamble for $2.3 billion in 1999 after increasing the pet-food maker's revenue from $1 million in the late 1970s to about $1 billion. Through Myrian Capital, his family has interests in pattern recognition technology and Web-calling service Oovoo, which has more than 150 million users.

As of Sept. 22, 2017:
Last change -$784k (-0.0%)
YTD change +$320M (+9.1%)
Industry Food & Beverage
Biggest asset Cash
Citizenship United States
Wealth Self-made
View net worth over:   Max 1 year 1 quarter 1 month 1 week

Relative Value

Clay Mathile's net worth of $3.83B can buy ...

troy ounces of gold
barrels of crude oil

... and is equivalent to ...

of the GDP of the United States
of the total wealth of the 500 richest people in the world
of the top 100 U.S. college endowments
of the top 200 U.S. executives’ total awarded compensation
of U.S. existing home sales
times the median U.S. household income

Latest News

Net Worth Summary

Private asset
Public asset
Misc. liabilities
Confidence rating:

The majority of Mathile's fortune is derived from the $2.3 billion sale of pet-food maker Iams to Procter & Gamble in 1999. Mathile is credited with proceeds of $1.95 billion to reflect the cash portion of the deal less $100 million he distributed among Iams employees, according to the 2009 book, "The Richest Man in Town" by Randall Jones.

Closely held family investment company Myrian Capital owns Web-calling service Oovoo. It's value has been indexed to the Russell 2000 Technology Growth Index since May 2011. The base valuation was derived from the price-per-subscriber paid by Microsoft to acquire Oovoo's competitor Skype in 2011. Oovoo has more than 150 million registered users, according to its website. Myrian is credited with a 50 percent stake to reflect its status as lead investor based on discussions with researcher VC Experts.

The value of his cash investments is based on an analysis of share sales, dividends, market performance, taxes and charitable contributions including about $150 million to endow and support Aileron, an organization offering support to entrepreneurs and business owners.

Mathile declined to comment on his net worth, according to New York-based Dave Donovan of DKC Public Relations.


Family: Married, 5 children

Clayton Mathile is the former chief executive officer of pet-food maker Iams. Mathilde was born in Ohio and first worked as a buyer for the Campbell Soup Company before joining Iams in 1970. He became sole owner of the company in 1982 and sold it to Procter & Gamble for $2.3 billion in 1999.

Mathilde now devotes most of his time to philanthropic activities. He founded Dayton-based Aileron, a non-profit organisation that helps business owners learn how to lead and manage their companies. He's also the chairman and CEO of The Mathile Institute, which works to alleviate hunger and malnutrition among children.

With his family, he established the Mathile Family Foundation in 1989, which has granted more than $230 million to non profit organizations that support children and their family in the Dayton area. Mathile's wife created The Glen at St. Joseph, a campus for low-income single mothers that provides them resources to break out of the cycle of poverty.

The billionaire lives in Dayton with his wife MaryAnn. The couple has five children and 15 grandchildren.

  • 1941 Clayton Mathile is born.
  • 1970 Joins Iams.
  • 1975 Buys half of Iams for $100,000.
  • 1982 Becomes sole owner of Iams.
  • 1989 Co-founds the Mathilde Family Foundation.
  • 1996 Non-profit group Aileron opens its doors to support business owners.
  • 1999 Sells Iams to Procter & Gamble.
  • 2008 Publishes autobiography, "Dream No Little Dreams."