The Williston Basin of North Dakota and Montana is the home of the Bakken and Three Forks plays — one of the premier light-oil resource basins in North America.
The Williston Basin (Bakken) has approximately 58,742 wells operated by 2,363 companies. Below are the largest operators by well count. Data as of 2026-08-03.
| # | Operator | Wells | Producing |
|---|---|---|---|
| 1 | Continental Resources | 4,341 | 3,561 |
| 2 | Hess Bakken Investments Ii | 2,903 | 2,517 |
| 3 | Ridge Oil & Gas | 2,769 | 2,758 |
| 4 | Whiting Petroleum CORP | 2,685 | 2,222 |
| 5 | Devon Energy Williston,LLC | 2,375 | 2,136 |
| 6 | Oasis Petroleum North America | 2,349 | 1,932 |
| 7 | Burlington Resources Oil & Gas Company | 1,658 | 1,170 |
| 8 | Xto Energy | 1,412 | 1,087 |
| 9 | Eog Resources | 1,366 | 833 |
| 10 | Enerplus Resources | 1,361 | 1,093 |
| 11 | Marathon Oil Company | 1,342 | 1,156 |
| 12 | Petrohunt | 1,326 | 1,049 |
| 13 | Mmgl Mt I, LLC | 970 | 785 |
| 14 | Slawson Exploration Company | 933 | 651 |
| 15 | Amerada Hess | 764 | 489 |
| 16 | Kraken Operating | 724 | 620 |
| 17 | Cobra Oil & Gas | 697 | 631 |
| 18 | Denbury Onshore | 696 | 596 |
| 19 | Morning Star Oil Company | 621 | 605 |
| 20 | Formentera Operations LLC | 545 | 418 |
| 21 | White Rock Oil & Gas | 526 | 495 |
| 22 | Fidelity Exploration & Production Company | 526 | 324 |
| 23 | Neptune Operating LLC | 523 | 487 |
| 24 | Shell Oil Company | 483 | 32 |
| 25 | Hunt Oil Company | 448 | 274 |
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Well counts compiled by Buckhead Energy from state oil & gas regulator records (data as of 2026-08-03); reflect wells where each company is the current operator of record in the Williston Basin (Bakken). Informational only.
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