The largest oil and gas operators active in Wyoming — ranked by total well count, with recent drilling activity, DUC inventory, and producing-well counts for each. Click any operator to see their full profile and current permits.
Refreshed monthly from WOGCC well-header records. Data current as of 2026-08-01.
Quick answer: By wells operated, Eog Resources is the largest oil and gas operator in Wyoming with 13,400 wells on record, followed by Anadarko Petroleum (7,208) and Devon Energy Production Company (6,180). Ranked from Wyoming Oil & Gas Conservation Commission (WOGCC) well-header records (as of 2026-08-01) and refreshed monthly. This is an operated-well-count ranking, not a revenue or market-cap ranking.
As of 2026-08-01, the most active operator in Wyoming is Eog Resources with 13,400 wells on record and 80 recent permits, across the top 100 ranked operators, per Wyoming Oil & Gas Conservation Commission (WOGCC) records.
| # | Operator | Wells | Permits 24mo | DUCs | Producing | Top Formation | Top County |
|---|---|---|---|---|---|---|---|
| 1 | Eog Resources | 13,400 | 80 | 855 | 1,869 | Niobrara- Mowry | Campbell |
| 2 | Anadarko Petroleum | 7,208 | 87 | 505 | 499 | Niobrara- Mowry | Converse |
| 3 | Devon Energy Production Company | 6,180 | 70 | 341 | 1,981 | Niobrara- Mowry | Campbell |
| 4 | Anschutz Exploration | 6,106 | 243 | 160 | 365 | Powder River Basin | Campbell |
| 5 | Carbon Creek Energy | 5,317 | 0 | 63 | 5,249 | Powder River Basin | Johnson |
| 6 | Lance Oil & Gas Company | 4,038 | 0 | 278 | 2,309 | Niobrara- Mowry | Campbell |
| 7 | Purewest Resources INC | 3,778 | 108 | 74 | 3,530 | Mesaverde-Lance | Sublette |
| 8 | Pennaco Energy Incorporated | 3,713 | 0 | 103 | 2,519 | Powder River Basin | Campbell |
| 9 | Wold Energy Partners | 3,683 | 0 | 10 | 2 | Niobrara- Mowry | Converse |
| 10 | Crowheart Energy | 3,578 | 43 | 36 | 3,340 | Mesaverde-Lance-Lewis | Sweetwater |
| 11 | Contango Resources Company | 3,169 | 0 | 339 | 2,685 | Niobrara- Mowry | Natrona |
| 12 | Yates Petroleum | 3,017 | 0 | 180 | 1,618 | Niobrara- Mowry | Campbell |
| 13 | Huber J M | 3,004 | 0 | 119 | 1,695 | Powder River Basin | Sheridan |
| 14 | Jonah Energy | 2,950 | 28 | 132 | 2,524 | Mesaverde-Lance | Sublette |
| 15 | Williams Production Gulf Coast | 2,616 | 0 | 93 | 1,132 | Powder River Basin | Campbell |
| 16 | Samson Resources Company | 2,581 | 4 | 92 | 179 | Niobrara- Mowry | Converse |
| 17 | Fdl Operating | 2,514 | 0 | 638 | 948 | Niobrara- Mowry | Natrona |
| 18 | Wrc Energy LLC | 2,433 | 74 | 44 | 250 | Niobrara- Mowry | Campbell |
| 19 | Merit Energy Company | 2,382 | 0 | 238 | 2,067 | Big Horn Basin | Park |
| 20 | Atx Energy Partners | 2,040 | 0 | 8 | 10 | Powder River Basin | Johnson |
| 21 | Bpx Operating Company | 2,005 | 0 | 1,077 | 393 | Mesaverde-Lance-Lewis | Sweetwater |
| 22 | Hilcorp Energy Company | 1,916 | 1 | 29 | 1,871 | Hilliardbaxtermancos-Niobrara | Lincoln |
| 23 | Noble Energy | 1,897 | 0 | 5 | 15 | Mesaverde-Lance-Lewis | Johnson |
| 24 | Continental Resources | 1,875 | 71 | 129 | 714 | Niobrara- Mowry | Converse |
| 25 | Wave Petroleum Operating | 1,869 | 5 | 5 | 3 | Muddy J Sand | Laramie |
| 26 | Barrett Resources | 1,678 | 0 | 72 | 1,364 | Niobrara- Mowry | Campbell |
| 27 | Davis Oil Company | 1,677 | 0 | 1,558 | 60 | Powder River Basin | Campbell |
| 28 | Seven Sisters Oil & Gas | 1,626 | 0 | 1 | 1 | Powder River Basin | Campbell |
| 29 | Ballard Petroleum Holdings | 1,598 | 19 | 86 | 193 | Powder River Basin | Johnson |
| 30 | Marathon Oil Company | 1,566 | 0 | 820 | 375 | Big Horn Basin | Hot Springs |
| 31 | Pine Haven Resources | 1,476 | 0 | 23 | 142 | Niobrara- Mowry | Campbell |
| 32 | Conocophillips Company | 1,448 | 0 | 987 | 146 | Niobrara- Mowry | Converse |
| 33 | Anschutz Oil Company | 1,444 | 0 | 55 | 2 | Niobrara- Mowry | Campbell |
| 34 | True Oil | 1,426 | 0 | 898 | 353 | Niobrara- Mowry | Campbell |
| 35 | Gungnir Operating LLC | 1,422 | 0 | 3 | 0 | Codell-Niobrara | Goshen |
| 36 | Urban Oil & Gas Group | 1,389 | 0 | 8 | 1,370 | Hilliardbaxtermancos-Niobrara | Sublette |
| 37 | Titan Exploration | 1,356 | 0 | 12 | 15 | Niobrara- Mowry | Campbell |
| 38 | Sage Butte Prb Operating, LLC | 1,336 | 10 | 27 | 114 | Niobrara- Mowry | Converse |
| 39 | C M S Oil And Gas Company | 1,327 | 0 | 17 | 738 | Powder River Basin | Campbell |
| 40 | Pinnacle Gas Resources | 1,326 | 0 | 38 | 583 | Powder River Basin | Campbell |
| 41 | Green Reserve Energy Holdings LLC | 1,217 | 1 | 184 | 1,004 | Niobrara- Mowry | Natrona |
| 42 | Grayson Mill Operating | 1,199 | 0 | 1 | 2 | Niobrara- Mowry | Converse |
| 43 | Wexpro Company | 1,134 | 34 | 227 | 732 | Mesaverde-Lance-Lewis | Sweetwater |
| 44 | Wamsutter E And P LLC | 1,118 | 0 | 3 | 18 | Mesaverde-Lance-Lewis | Sweetwater |
| 45 | Bill Barrett | 1,094 | 0 | 36 | 501 | Niobrara- Mowry | Campbell |
| 46 | Impact Exploration Company | 1,091 | 5 | 18 | 4 | Niobrara- Mowry | Converse |
| 47 | Navigation Powder River | 1,072 | 0 | 9 | 17 | Niobrara- Mowry | Campbell |
| 48 | Kennedy Oil | 1,016 | 0 | 95 | 738 | Powder River Basin | Campbell |
| 49 | Prima Oil & Gas Company | 1,004 | 0 | 30 | 621 | Powder River Basin | Campbell |
| 50 | Fidelity Exploration & Production Company | 962 | 0 | 55 | 535 | Powder River Basin | Sheridan |
| 51 | Century Oil & Gas | 960 | 0 | 8 | 14 | Niobrara- Mowry | Niobrara |
| 52 | Red Stone Resources | 954 | 0 | 67 | 539 | Powder River Basin | Campbell |
| 53 | Citation Oil & Gas | 943 | 2 | 146 | 766 | Big Horn Basin | Campbell |
| 54 | North Silo Resources LLC | 925 | 1 | 22 | 58 | Muddy J Sand | Laramie |
| 55 | M & K Oil Company | 904 | 0 | 15 | 869 | Niobrara- Mowry | Weston |
| 56 | Denbury Onshore | 887 | 0 | 59 | 775 | Niobrara- Mowry | Campbell |
| 57 | Redstone Gas Partners | 819 | 0 | 59 | 430 | Powder River Basin | Johnson |
| 58 | Ultra Resources | 815 | 6 | 261 | 8 | Mesaverde-Lance | Sublette |
| 59 | Southland Royalty Company | 778 | 0 | 114 | 12 | Mesaverde-Lance-Lewis | Sweetwater |
| 60 | Nance Petroleum | 773 | 0 | 10 | 505 | Powder River Basin | Sheridan |
| 61 | Peak Powder River Resources | 746 | 3 | 35 | 106 | Niobrara- Mowry | Campbell |
| 62 | Black Diamond Energy | 732 | 0 | 203 | 225 | Powder River Basin | Johnson |
| 63 | Chevron | 710 | 0 | 336 | 241 | Green River Basin | Sublette |
| 64 | Chesapeake Energy | 696 | 0 | 109 | 5 | Niobrara- Mowry | Converse |
| 65 | North Finn | 641 | 0 | 54 | 234 | Powder River Basin | Campbell |
| 66 | Osage Partners | 636 | 0 | 227 | 381 | Powder River Basin | Weston |
| 67 | Howell Petroleum | 627 | 0 | 320 | 204 | Niobrara- Mowry | Natrona |
| 68 | Breitburn Operating | 607 | 0 | 13 | 577 | Hilliardbaxtermancos-Niobrara | Sweetwater |
| 69 | Shell Oil Company | 565 | 0 | 330 | 8 | Mesaverde-Lance | Sublette |
| 70 | Longs Peak Resources | 563 | 7 | 15 | 8 | Muddy J Sand | Laramie |
| 71 | Bright Rock Energy LLC | 541 | 0 | 6 | 0 | Niobrara- Mowry | Converse |
| 72 | Rim Operating | 536 | 0 | 66 | 375 | Niobrara- Mowry | Campbell |
| 73 | Encana Oil & Gas | 536 | 0 | 83 | 58 | Mesaverde-Lance | Sublette |
| 74 | Amoco Production Company | 528 | 0 | 41 | 311 | Mesaverde-Lance-Lewis | Sweetwater |
| 75 | Rockies Resources Holdings | 518 | 11 | 10 | 25 | Mesaverde-Lance-Lewis | Sweetwater |
| 76 | Westport Oil & Gas Company | 518 | 0 | 167 | 263 | Niobrara- Mowry | Campbell |
| 77 | Cassidy American Resources LLC | 517 | 0 | 0 | 0 | Niobrara- Mowry | Johnson |
| 78 | Elephant Operating | 508 | 0 | 2 | 1 | Niobrara- Mowry | Converse |
| 79 | Atlantic Richfield Company | 500 | 0 | 414 | 21 | Greater Green River Basin | Sweetwater |
| 80 | Windsor Energy Group | 497 | 0 | 17 | 309 | Powder River Basin | Johnson |
| 81 | Exxon Mobil | 486 | 2 | 332 | 70 | Niobrara- Mowry | Sublette |
| 82 | Petrocanada Resources | 476 | 0 | 115 | 186 | Powder River Basin | Campbell |
| 83 | Comet Energy Services | 449 | 0 | 21 | 137 | Powder River Basin | Campbell |
| 84 | Sunshine Valley Petroleum | 446 | 0 | 20 | 398 | Niobrara- Mowry | Weston |
| 85 | Martens & Peck Operating Company | 443 | 0 | 222 | 1 | Niobrara- Mowry | Campbell |
| 86 | Phillips Petroleum Company | 439 | 0 | 158 | 146 | Niobrara- Mowry | Campbell |
| 87 | Rki Exploration & Production | 430 | 0 | 9 | 8 | Niobrara- Mowry | Converse |
| 88 | Coleman Oil & Gas | 430 | 0 | 19 | 236 | Niobrara- Mowry | Campbell |
| 89 | Wesco Operating | 408 | 1 | 72 | 308 | Wind River Basin | Fremont |
| 90 | Texaco Exploration And Production | 379 | 0 | 232 | 88 | Powder River Basin | Sweetwater |
| 91 | Amplify Energy Operating | 377 | 0 | 86 | 285 | Green River Basin | Sweetwater |
| 92 | Continental Industries LC | 373 | 0 | 61 | 172 | Powder River Basin | Sheridan |
| 93 | Matrix Production Company | 370 | 0 | 2 | 366 | Niobrara- Mowry | Converse |
| 94 | Eme Wyoming LLC | 362 | 0 | 1 | 0 | Codell-Niobrara | Goshen |
| 95 | Ch4 Energy | 348 | 0 | 3 | 229 | Powder River Basin | Campbell |
| 96 | Midgard Energy Company | 344 | 0 | 267 | 60 | Niobrara- Mowry | Campbell |
| 97 | Richardson Operating Company | 329 | 0 | 77 | 234 | Wind River Basin | Fremont |
| 98 | Big Basin Petroleum | 326 | 0 | 15 | 197 | Powder River Basin | Campbell |
| 99 | Northwest Energy | 325 | 0 | 36 | 105 | Powder River Basin | Johnson |
| 100 | Wy Basin Operating LLC | 316 | 0 | 6 | 310 | Hilliardbaxtermancos-Niobrara | Carbon |
Source: Wyoming Oil & Gas Conservation Commission well-header records.
Ranking: Operators ranked by total well count under their current operator-of-record. Recent permits cover the last 24 months; DUC count is wells spudded but not yet producing; producing-well count is wells with a first-production date on file.
Why it matters: Knowing who operates the most wells in Wyoming — and who's drilling the most NOW — helps mineral owners understand who they're dealing with at the lease level.
Refresh cadence: Monthly. Data current as of 2026-08-01.
Cite this dataset
Permanently archived and citable via a DOI on Zenodo (CERN), under a CC BY 4.0 license. DOI: 10.5281/zenodo.21442884 · View on Zenodo
License & attribution: This data is licensed CC BY 4.0. You are free to share and adapt it, including commercially, provided you credit “Buckhead Energy” and link back to this page or the DOI above.
By wells operated, Eog Resources is the largest oil and gas operator in Wyoming, with 13,400 wells on record per Wyoming Oil & Gas Conservation Commission (WOGCC) data. Note that "biggest" by revenue or market capitalization can rank differently — this measures operated well count.
The top 10 operators by operated well count are: Eog Resources, Anadarko Petroleum, Devon Energy Production Company, Anschutz Exploration, Carbon Creek Energy, Lance Oil & Gas Company, Purewest Resources INC, Pennaco Energy Incorporated, Wold Energy Partners, Crowheart Energy. The full top-100 ranking with permits, DUC inventory, and producing-well counts is in the leaderboard below.
Eog Resources operates the most wells in Wyoming at 13,400, with 80 permits filed in the last 24 months, per WOGCC well-header records.
This leaderboard ranks the top 100 operators active in Wyoming by total well count. Many more file with the regulator; these are the largest by operated wells.
By wells operated — the count of wells under each company's current operator-of-record designation in Wyoming Oil & Gas Conservation Commission (WOGCC) records. It is not a revenue, production-volume, or market-capitalization ranking.
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State: Wyoming
Operators ranked: 100
Total wells: 154,607
Permits (24mo): 916
Last refresh: 2026-08-01
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