Bloomberg Billionaires Index

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#197 Dave Duffield $7.59B

Random fact: Created Maddie's Fund, an animal welfare organization.


Duffield is the co-founder and largest shareholder of Workday, a maker of cloud-based employee-management and payroll software. The Pleasanton, California-based company's customers include Netflix and MGM. Duffield was also the founder of PeopleSoft, an enterprise-software maker acquired by Oracle in 2005.

As of July 28, 2017:
Last change -$166M (-2.1%)
YTD change +$2.48B (+48.5%)
Industry Technology
Biggest asset WDAY US Equity
Citizenship United States
Age 76
Wealth Self-made
View net worth over:   Max 1 year 1 quarter 1 month 1 week

Relative Value

Dave Duffield's net worth of $7.59B 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 Duffield's fortune is derived from his 50 percent stake in Workday, a manufacturer of cloud-based payroll and employee management software. He owns about 63 million shares of the company's class B stock directly and about 125,000 shares of class A stock directly, according to a May 2017 SEC filing. About half of the class A shares are restricted stock units and removed from the analysis. His wife, Cheryl, holds about 2.9 million class A and B shares through a trust, according to a December 2013 SEC filing. These shares are credited to the billionaire in the net worth analysis to reflect his status as chairman and founder.

Prior to founding Workday, Duffield was the chief executive officer of PeopleSoft. Between the company's initial public offering in 1992 and its sale to Oracle in 2005, Duffield collected more than $600 million through stock sales.

The value of his cash and other investable assets is based on an analysis of insider transactions, market performance, investments, taxes and charitable donations.

Eric Glass, a spokesman for Duffield, declined to comment on the billionaire's net worth.


Birthdate: 9/21/1940
Family: Unmarried, No children
Education: 1964, Cornell University, MBA 1962, Cornell University, Electrical Engineering, Bachelor's Degree

Dave Duffield was born in Cleveland, Ohio in 1940. His parents moved to New Jersey when he was six months old. Among his early memories was watching his father, an engineer, build the first television in their community. He enrolled at Cornell University where he graduated with a degree in electrical engineering and an MBA from the business school.

Soon after, he went to work for IBM. There he honed his entrepreneurial skills by developing new computer systems. He left in 1968 to start his own company, Information Associates, which created exam software for colleges. He founded PeopleSoft in 1987. The company, which specialized in employee management systems, was acquired for $10.3 billion by Oracle in 2005. He started Workday, which also made employee management software, later the same year.

The majority of Duffield's giving goes to Cornell University and to Maddie's Fund, his personal foundation that works to end animal euthanasia at pet shelters. The orgnanization is named after his miniature schnauzer, Maddie, who died in 1997.

  • 1964 Receives an MBA from Cornell University.
  • 1968 Starts first company, Information Associates, after leaving IBM.
  • 1987 Founds PeopleSoft, an employee management software company.
  • 2004 Oracle acquires PeopleSoft for $10.3 billion in a hostile takeover.
  • 2004 Resigns as CEO of PeopleSoft.
  • 2005 Starts Workday, a maker of cloud-based management software.
  • 2012 Workday raises $637 million in an initial public offering.
  • 2013 Dave and Cheryl Duffield founded Maddie's Fund to honor their dog.