Harold Hamm Net Worth

Harold Hamm has an estimated net worth of $19 billion, according to Forbes Real-Time Billionaires, Harold Hamm profile (figures as of October 20, 2026). That is up from $12.7 billion in 2019.

Harold Hamm is an American oil executive and entrepreneur in the energy industry. He founded Shelly Dean Oil Company in 1967, and that business later became Continental Resources, where he served as founder and chairman. He built his career as a wildcatter, then moved from hauling water to and from oilfields to drilling wells. His rise in oil and gas made him one of the best-known business figures tied to the Bakken region and U.S. shale development.

His wealth came from building Continental Resources into one of the nation’s biggest independent oil companies. In 1971, he took out a loan to drill his first well. In the 1990s, he pushed horizontal drilling and hydraulic fracturing in North Dakota’s Bakken region, a move that helped reshape the U.S. oil business. Continental later expanded beyond the U.S. with investments in Turkey and Argentina. Forbes currently estimates his fortune at $19 billion.

How Harold Hamm built his fortune

Hamm made his money in oil and gas by starting small and then scaling up. Before drilling, he ran a trucking company that hauled water to and from oilfields. He founded Shelly Dean Oil Company in 1967, then kept building until the business became Continental Resources. That company grew into a major producer and was known for shale oil development, especially in the Bakken oil field in North Dakota and Montana.

A big part of his success came from betting early on drilling methods that others had not fully embraced. In the 1990s, he saw the potential of horizontal wells and hydraulic fracturing in the Bakken region. That helped turn Continental into a major name in U.S. energy. In recent years, the company also invested in Turkey and Argentina. In 2022, Hamm took Continental private in a leveraged buyout and divided ownership among his children.

Forbes net worth updates

Forbes has tracked large swings in Hamm’s fortune over the years. On the Forbes World’s Billionaires List, his estimate was $12.7 billion in 2019, then $2.4 billion in 2020. It later rebounded to $17.2 billion in 2022. Those changes followed the value of his oil and gas holdings and the business he built at Continental Resources, which remained the core of his wealth throughout that stretch.

More recently, Forbes put Hamm at $18.5 billion on its World’s Billionaires List in 2025. As of October 20, 2026, Forbes’ real-time billionaires tracker shows him at $19 billion. That places his money story firmly in the energy sector, where Continental’s scale, its Bakken position, and later overseas investments in Turkey and Argentina have remained central themes in how his fortune has been measured.