Billionaire Profile
H
Global Rank
#183

Image: Unknown Author | Public domain | via Wikimedia Commons

Harold Hamm & family

CEO, Oil & gas
UNITED STATES
Real-Time Net Worth
$16B
Estimated based on Oil & gas stock value as of April 20, 2026
0% (24h)
Age
80
Source
Oil & gas
Industry
Energy
Citizenship
UNITED STATES

Biography

Harold Hamm is an 80-year-old American business magnate and oil and gas industry leader. He is best known as the founder and chairman of Continental Resources, a company he started in 1967 and transformed into a top independent oil producer in the United States. Hamm pioneered fracking of shale oil resources, contributing significantly to the energy sector and amassing a net worth of $16.0 billion, primarily from his oil and gas ventures. Throughout his career, Hamm has been recognized for his entrepreneurial achievements and contributions to the state of Oklahoma.

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Live Data
Updated 4/20/2026

Wealth Over Time

In-Depth Profile

Early Life

Harold Glenn Hamm was born on December 11, 1945, in Lexington, Oklahoma, the youngest of 13 children born to cotton sharecroppers. He grew up working hard and, at the age of 16, began working at a gas station to support his family. After graduating from Enid High School in 1964, he was unable to afford college.

Rise to Success

Hamm's career in the oil industry began when he started his own oilfield service company at the age of 21. With a $1,000 loan, he purchased a tank truck and began hauling water and drilling mud. In 1967, he founded Shelly Dean Oil Company, later renamed Continental Resources, Inc. (CLR). Hamm pioneered the development of the Bakken shale play in North Dakota and Montana using horizontal drilling and hydraulic fracturing. Continental Resources went public in 2007, but in November 2022, Hamm took the company private again through Omega Acquisition, Inc..

Key Business Strategies

Hamm's success is attributed to his strategic vision and ability to capitalize on unconventional resource plays. He focused on oil exploration and production, particularly in the Bakken shale, SCOOP, and STACK plays. Continental Resources became a leader in domestic energy, with Hamm's innovative approach driving the company's growth and efficiency.

Philanthropy

Harold Hamm has also been involved in philanthropy, with significant donations to education and diabetes research. He donated $10 million to the University of North Dakota to create the Harold Hamm School of Geology and Geological Engineering and $12 million to the University of Mary to establish the Hamm School of Engineering.

Career Milestones

1967

Founded Shelly Dean Oil Company

Harold Hamm founded Shelly Dean Oil Company, which later became Continental Resources.

1990

Renamed to Continental Resources

Shelly Dean Oil Company rebranded to Continental Resources.

2007

Continental Resources IPO

Continental Resources went public on the NYSE.

2022

Continental Resources goes private

Continental Resources was acquired by Omega Acquisition, Inc., an entity wholly owned by Hamm.

Philanthropy & Social Impact

Education

Harold Hamm School of Geology and Geological Engineering

$10M

Donation to the University of North Dakota.

Education

Hamm School of Engineering

$12M

Donation to the University of Mary.

Controversies & Challenges

2012-2015

Divorce Settlement

Hamm's divorce from Sue Ann Arnall resulted in a $974 million settlement.

2024

Continental Resources Opt-Out

Continental Resources opted out of Oklahoma's voluntary fund to clean up orphaned oil wells.