Harold Hamm

Harold Hamm
Born	(1945-12-11) December 11, 1945 Lexington, Oklahoma, U.S.
Occupation(s)	Entrepreneur, oil and gas industry executive
Known for	Founder and chairman of Continental Resources; pioneer in hydraulic fracturing of shale oil

Harold Glenn Hamm (born December 11, 1945) is a prominent American entrepreneur in the oil and gas sector, widely acknowledged for his groundbreaking work in hydraulic fracturing of shale oil deposits. As of early 2022, his fortune was valued at approximately $18.5 billion, placing him 63rd among the world's wealthiest individuals. He is the founder and currently serves as chairman of Continental Resources.

In 2012, Hamm was appointed as an energy advisor by presidential hopeful Mitt Romney and played an active role in Romney's campaign efforts. Additionally, he has been a key fundraiser and contributor to Donald Trump’s presidential bids in 2016, 2020, and 2024.

Early life

Born in Lexington, Oklahoma, Hamm was the youngest child among 13 siblings in the family of cotton sharecroppers Jane Elizabeth (née Sparks) and Leland Albert Hamm. At age 16, he took a job at a gas station to help support his family and later worked cleaning oil tanks at a refinery. He completed his studies at Enid High School in 1964.

Hamm began his career as a "wildcatter," drilling exploratory wells in uncharted territories. After successfully discovering oil, he pursued higher education at Phillips University in Enid.

Career

In 1967, Hamm established Shelly Dean Oil Company, which eventually transformed into Continental Resources. The firm was instrumental in advancing the development of the Bakken oil field across North Dakota and Montana by utilizing horizontal drilling techniques combined with hydraulic fracturing. Continental Resources expanded to become a leading shale oil producer, propelling Hamm to billionaire status. At one point, it ranked as Oklahoma’s fourth-largest publicly traded company.

Hamm earned the prestigious Ernst & Young "Entrepreneur of the Year" accolade in 2007 and was inducted into the Oklahoma Hall of Fame in 2011. In 2012, he was recognized by Time magazine as one of the "World's 100 Most Influential People." Forbes spotlighted him on its May 2014 cover with the feature titled "Harold Hamm: The Billionaire Oilman Fueling America's Recovery."

Political involvement

Soon after joining Republican Mitt Romney's presidential bid as an energy advisor in March 2012, Hamm contributed $985,000 to the pro-Romney super PAC Restore Our Future. He has been identified as part of the conservative donor network associated with the Koch brothers, Charles and David Koch.

In January 2016, Hamm asserted that Saudi Arabia was attempting unsuccessfully to "flood the crude market amid oversupply." Subsequently, OPEC and its allies including Russia (known as OPEC+) implemented their first production reduction since the 2008 financial crisis, acknowledging the competitive strength of U.S. shale producers.

At the 2016 Republican National Convention, Hamm criticized energy policies under President Barack Obama, accusing the administration of imposing regulations that would increase gasoline costs. He also opposed the 2015 Iran nuclear deal, cautioning it would allow Iran to export oil and advance nuclear weapons development.

During the 2016 United States presidential election, Republican nominee Donald Trump considered Hamm for the position of energy secretary. Hamm donated $320,000 to Trump's 2020 re-election effort. While he expressed criticism of Trump’s role in the January 6 United States Capitol attack, Hamm subsequently raised funds for Trump’s 2024 campaign after Trump secured the presumptive Republican nomination.

Hamm has frequently voiced opposition to the energy and environmental strategies of the Joe Biden administration. In April 2024, he hosted an event at Trump’s Mar-a-Lago estate where leaders from the oil sector pledged one billion dollars toward Trump’s 2024 campaign, anticipating a rollback of environmental regulations if Trump returns to office. According to Desmog, Hamm personally contributed over $1.6 million to Trump’s campaign efforts, with Continental Resources adding more than $2 million. During Trump’s inauguration, Hamm received a distinguished seat alongside other billionaire benefactors.

Journalist Emily Atkin highlights that Hamm has organized most fossil fuel industry fundraising events for Trump and emphasizes his ties with officials such as Doug Burgum from the Department of Interior and Chris Wright from the Department of Energy.

Opposition to Renewable Energy

Hamm has been a prominent opponent of renewable energy sources for many years. In 2016, he established the non-profit Windfall Coalition with the purpose of challenging state tax incentives granted to the wind energy sector in Oklahoma. The Coalition contends that these tax credits impose a financial strain on taxpayers and associate them with budget deficits in Oklahoma, even though numerous incentives have been gradually eliminated. While critics primarily attribute these fiscal shortfalls to declining oil prices, the Coalition places responsibility on wind energy.

Meanwhile, Oklahoma's oil and gas industry, including companies like Continental Resources, continues to benefit from substantially larger tax advantages—estimated to exceed $600 million annually—such as lowered production tax rates and rebates on wells that are not profitable.

Educational Contributions

The Harold Hamm Diabetes Center at the University of Oklahoma, named in honor of Hamm who manages type 2 diabetes, was founded through a $10 million gift from the Harold and Sue Ann Hamm Foundation. Additionally, Hamm is a member of the Global Leadership Council at Concordia College’s Offutt School of Business located in Moorhead, Minnesota.

Together with Continental Resources, Hamm donated $10 million to the University of North Dakota’s College of Engineering and Mines, resulting in the creation of the Harold Hamm School of Geology and Geological Engineering. This donation ranks among the largest ever made by a non-alumnus to the institution.

On February 1, 2022, a combined contribution of $12 million from the Harold Hamm Foundation and Continental Resources was made to the University of Mary in Bismarck, North Dakota. This funding established the Hamm School of Engineering and endowed the "Continental Resources | Monsignor James Shea Chair of Engineering." This gift is recognized as the largest educational philanthropy in western North Dakota and eastern Montana within the Bakken formation region.

Personal Background

Hamm’s first marriage was to Judith Ann; they had three children before divorcing in 1987. In April 1988, he wed Sue Ann Arnall, an economist and attorney who held an executive position at Continental Resources. The couple had two children prior to Arnall filing for divorce in May 2012; however, Hamm indicated their separation occurred in 2005. Media coverage suggested that as much as half of Hamm’s estimated $20 billion net worth could be at stake in this divorce, potentially setting a global precedent. A court mandated Hamm to pay nearly $1 billion, an amount Arnall initially contested seeking a higher figure. She eventually accepted and deposited the $974.8 million settlement check in 2015.

Hamm lives primarily in Oklahoma City and also owns residences in Enid and Nichols Hills, Oklahoma.

He has been awarded honorary degrees by the University of Mary, Northwestern Oklahoma State University, the University of Oklahoma, and the University of North Dakota.