The Powder River Basin of northeastern Wyoming and southeastern Montana is an emerging oil play (Niobrara, Mowry, Turner) atop a legacy of coalbed-methane and conventional production.
The Powder River Basin has approximately 108,634 wells operated by 2,594 companies. Below are the largest operators by well count. Data as of 2026-08-03.
| # | Operator | Wells | Producing |
|---|---|---|---|
| 1 | Eog Resources | 7,633 | 853 |
| 2 | Anschutz Exploration | 4,936 | 342 |
| 3 | Devon Energy Production Company | 4,554 | 1,744 |
| 4 | Lance Oil & Gas Company | 3,987 | 2,303 |
| 5 | Pennaco Energy Incorporated | 3,698 | 2,505 |
| 6 | Carbon Creek Energy | 3,110 | 3,058 |
| 7 | Huber J M | 2,936 | 1,659 |
| 8 | Wold Energy Partners | 2,642 | 1 |
| 9 | Yates Petroleum | 2,610 | 1,553 |
| 10 | Williams Production Gulf Coast | 2,596 | 1,129 |
| 11 | Anadarko Petroleum | 2,466 | 230 |
| 12 | Fidelity Exploration & Production Company | 2,048 | 1,390 |
| 13 | Wrc Energy LLC | 1,796 | 157 |
| 14 | Barrett Resources | 1,586 | 1,338 |
| 15 | Atx Energy Partners | 1,520 | 10 |
| 16 | Continental Resources | 1,413 | 625 |
| 17 | Pinnacle Gas Resources | 1,355 | 580 |
| 18 | C M S Oil And Gas Company | 1,324 | 736 |
| 19 | Samson Resources Company | 1,304 | 7 |
| 20 | Seven Sisters Oil & Gas | 1,229 | 0 |
| 21 | Ballard Petroleum Holdings | 1,127 | 152 |
| 22 | Pine Haven Resources | 1,092 | 84 |
| 23 | Anschutz Oil Company | 1,009 | 2 |
| 24 | Titan Exploration | 1,000 | 10 |
| 25 | Sage Butte Prb Operating, LLC | 987 | 93 |
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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 Powder River Basin. Informational only.
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