The largest oil and gas operators active in Kansas — ranked by total well count, with producing-well counts for each. Click any operator to see their full profile.
Buckhead Energy analysis of public oil and gas data. Refreshed daily. Data current as of 2026-11-01.
Researching an operator or well activity is one part of understanding a mineral or royalty interest.
Quick answer: By wells operated, Eiger Operating Company, LLC is the largest oil and gas operator in Kansas with 8,366 wells on record, followed by RJ Energy (5,589) and Colt Energy (3,833). Ranked from Buckhead Energy analysis of public oil and gas data (as of 2026-11-01). This is an operated-well-count ranking, not a revenue or market-cap ranking.
As of 2026-11-01, the largest operator by wells on record in Kansas is Eiger Operating Company, LLC with 8,366 wells on record, across the top 100 ranked operators, per Buckhead Energy analysis of public oil and gas data.
| # | Operator | Wells | Producing | Top Formation | Top County |
|---|---|---|---|---|---|
| 1 | Eiger Operating Company, LLC | 8,366 | 7,861 | Anadarko Basin | Grant |
| 2 | Rj Energy | 5,589 | 3,579 | Forest City Basin | Anderson |
| 3 | Colt Energy | 3,833 | 2,106 | Excello-Mulky | Allen |
| 4 | Murfin Drilling | 3,078 | 1,603 | Central Kansas Uplift | Rawlins |
| 5 | American Warrior | 3,016 | 1,652 | Anadarko Basin | Ness |
| 6 | Oxy | 2,527 | 1,327 | Anadarko Basin | Butler |
| 7 | River Rock Operating | 2,375 | 2,286 | Excello-Mulky | Neosho |
| 8 | Vess Oil | 2,288 | 1,626 | Central Kansas Uplift | Butler |
| 9 | Redbud Oil & Gas11/Ofb | 2,186 | 2,010 | Excello-Mulky | Montgomery |
| 10 | Berexco | 2,105 | 1,429 | Anadarko Basin | Russell |
| 11 | Bobcat Oilfield Service | 1,980 | 1,326 | Forest City Basin | Miami |
| 12 | Scout Energy Management | 1,934 | 1,702 | Anadarko Basin | Stevens |
| 13 | Ritchie Exploration | 1,891 | 1,082 | Central Kansas Uplift | Graham |
| 14 | Laymon Oil Ii | 1,880 | 1,497 | Cherokee Basin | Woodson |
| 15 | Anadarko Petroleum | 1,500 | 804 | Anadarko Basin | Morton |
| 16 | Mai Oil Operations | 1,381 | 1,010 | Central Kansas Uplift | Russell |
| 17 | Southern Community | 1,368 | 358 | Forest City Basin | Anderson |
| 18 | Altavista Energy | 1,347 | 682 | Forest City Basin | Miami |
| 19 | Running Foxes Petroleum | 1,237 | 339 | Excello-Mulky | Bourbon |
| 20 | Pickrell Drilling Company | 1,232 | 599 | Anadarko Basin | Ness |
| 21 | F G Holl Company | 1,203 | 787 | Central Kansas Uplift | Edwards |
| 22 | Farmer John O | 1,185 | 583 | Central Kansas Uplift | Russell |
| 23 | Birk Petroleum | 1,137 | 609 | Forest City Basin | Coffey |
| 24 | Trans Pacific Oil | 1,109 | 764 | Central Kansas Uplift | Rooks |
| 25 | Edison Operating Company | 1,106 | 1,003 | Anadarko Basin | Seward |
| 26 | Range Oil Company | 1,094 | 443 | Nemaha Anticline | Butler |
| 27 | Bg5 | 1,084 | 802 | Forest City Basin | Franklin |
| 28 | Town Oil Company | 1,063 | 222 | Forest City Basin | Miami |
| 29 | Patterson Energy | 1,022 | 837 | Central Kansas Uplift | Ellis |
| 30 | Jtc Oil | 1,010 | 597 | Forest City Basin | Miami |
| 31 | Palomino Petroleum | 990 | 400 | Anadarko Basin | Ness |
| 32 | Owens Oil Company | 986 | 800 | Excello-Mulky | Woodson |
| 33 | Herman L Loeb | 986 | 794 | Anadarko Basin | Barber |
| 34 | Mcfadden Oil Company | 967 | 582 | Excello-Mulky | Allen |
| 35 | Kansas Energy Company | 965 | 754 | Excello-Mulky | Chautauqua |
| 36 | Postrock Midcontinent Production | 949 | 643 | Excello-Mulky | Neosho |
| 37 | Mccoy Petroleum | 920 | 453 | Anadarko Basin | Harper |
| 38 | Oil Producers INC Of Kansas | 907 | 595 | Anadarko Basin | Seward |
| 39 | Kansas Resource Exploration & Development | 904 | 241 | Forest City Basin | Johnson |
| 40 | Merit Energy Company | 902 | 630 | Anadarko Basin | Haskell |
| 41 | Bear Petroleum | 898 | 616 | Central Kansas Uplift | Cowley |
| 42 | A & A Well Service | 886 | 695 | Excello-Mulky | Allen |
| 43 | Lario Oil & Gas Company | 884 | 559 | Anadarko Basin | Kingman |
| 44 | Mull Drilling Company | 861 | 434 | Anadarko Basin | Ness |
| 45 | Exxon Mobil | 823 | 574 | Anadarko Basin | Stevens |
| 46 | L D Drilling | 792 | 260 | Central Kansas Uplift | Barton |
| 47 | Manuel | 790 | 333 | Central Kansas Uplift | Graham |
| 48 | Trimble & Maclaskey Oil | 786 | 681 | Cherokee Basin | Woodson |
| 49 | Dart Cherokee Basin Operating | 766 | 382 | Excello-Mulky | Montgomery |
| 50 | Cherokee Wells | 760 | 361 | Excello-Mulky | Wilson |
| 51 | Rama Operating | 760 | 521 | Central Kansas Uplift | Stafford |
| 52 | Downingnelson Oil | 753 | 403 | Central Kansas Uplift | Trego |
| 53 | Jv Oil | 736 | 460 | Excello-Mulky | Wilson |
| 54 | Phillips Petroleum Company | 731 | 291 | Central Kansas Uplift | Trego |
| 55 | Daystar Petroleum | 728 | 548 | Central Kansas Uplift | Rice |
| 56 | Haas Petroleum | 708 | 224 | Forest City Basin | Franklin |
| 57 | Gore Oil Company | 693 | 508 | Central Kansas Uplift | Rooks |
| 58 | Osborn Energy | 679 | 27 | Excello-Mulky | Miami |
| 59 | Val Energy | 666 | 331 | Sedgwick Basin | Barber |
| 60 | Bpx Operating Company | 662 | 335 | Anadarko Basin | Stanton |
| 61 | Vincent Oil | 658 | 287 | Anadarko Basin | Ford |
| 62 | Raymond Oil Company | 654 | 210 | Central Kansas Uplift | Pratt |
| 63 | Tdr Construction | 640 | 263 | Forest City Basin | Franklin |
| 64 | Bach Oil Production | 637 | 491 | Central Kansas Uplift | Phillips |
| 65 | Grand Mesa Operating Company | 635 | 374 | Anadarko Basin | Gove |
| 66 | Finney Oil Company | 606 | 484 | Excello-Mulky | Montgomery |
| 67 | Bcemach | 604 | 550 | Anadarko Basin | Seward |
| 68 | Casillas Petroleum | 599 | 533 | Anadarko Basin | Haskell |
| 69 | Hartman Oil | 597 | 406 | Anadarko Basin | Finney |
| 70 | Trek Aec | 596 | 314 | Sedgwick Basin | Mc Pherson |
| 71 | Mcgown Drilling | 596 | 285 | Forest City Basin | Bourbon |
| 72 | Hg Oil Holdings LLC | 593 | 497 | Central Kansas Uplift | Ellis |
| 73 | 325 Energy Operations, LLC | 582 | 419 | Forest City Basin | Linn |
| 74 | Sandridge Exploration & Production | 573 | 351 | Sedgwick Basin | Harper |
| 75 | Owens Petroleum | 567 | 508 | Cherokee Basin | Woodson |
| 76 | Carmen Schmitt | 557 | 288 | Central Kansas Uplift | Rooks |
| 77 | L & A Energy | 533 | 387 | Forest City Basin | Franklin |
| 78 | Verde Oil Company | 528 | 239 | Excello-Mulky | Allen |
| 79 | Hess Oil Company | 519 | 219 | Sedgwick Basin | Mc Pherson |
| 80 | Shakespeare Oil | 516 | 282 | Anadarko Basin | Scott |
| 81 | Own Resources Operating | 505 | 493 | Niobrara East | Cheyenne |
| 82 | Stelbar Oil CORP | 489 | 214 | Anadarko Basin | Scott |
| 83 | G L M Company | 484 | 362 | Central Kansas Uplift | Russell |
| 84 | Rh Capitalbeets LLC | 482 | 334 | Forest City Basin | Franklin |
| 85 | Hb Energy | 477 | 344 | Forest City Basin | Johnson |
| 86 | Rjm Company | 472 | 357 | Central Kansas Uplift | Barton |
| 87 | Ace Energy | 467 | 387 | Excello-Mulky | Crawford |
| 88 | Samuel Gary Jr & Associates | 466 | 93 | Central Kansas Uplift | Comanche |
| 89 | R & B Oil & Gas | 465 | 366 | Sedgwick Basin | Harper |
| 90 | Triple I | 458 | 73 | Forest City Basin | Linn |
| 91 | Marathon Oil Company | 453 | 142 | Sedgwick Basin | Barber |
| 92 | Darrah Oil Company | 453 | 328 | Central Kansas Uplift | Butler |
| 93 | Tailwater | 450 | 108 | Forest City Basin | Anderson |
| 94 | Bauer Oil Investment | 448 | 299 | Forest City Basin | Miami |
| 95 | Kelt Energy | 437 | 70 | Excello-Mulky | Montgomery |
| 96 | N & W Enterprises | 437 | 182 | Excello-Mulky | Crawford |
| 97 | Parker And Parsley Development | 433 | 27 | Excello-Mulky | Neosho |
| 98 | Bluejacket Operating, LLC | 427 | 399 | Excello-Mulky | Wilson |
| 99 | Jrc Oil | 425 | 264 | Forest City Basin | Anderson |
| 100 | Kansas Oil Company | 419 | 222 | Forest City Basin | Coffey |
Source: Buckhead Energy analysis of public oil and gas data.
Ranking: Operators ranked by total well count under their current operator-of-record. Producing-well count is wells with a first-production date on file. Drilling activity (permits, spuds, DUCs) is published only as state and county counts, never attributed to an operator.
Why it matters: Knowing who operates the most wells in Kansas helps mineral owners understand who they're dealing with at the lease level.
Refresh cadence: Daily. Data current as of 2026-11-01.
By wells operated, Eiger Operating Company, LLC is the largest oil and gas operator in Kansas, with 8,366 wells on record per Buckhead Energy analysis of public oil and gas 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: Eiger Operating Company, LLC, RJ Energy, Colt Energy, Murfin Drilling, American Warrior, Oxy, River Rock Operating, Vess Oil, Redbud Oil & Gas11/Ofb, Berexco. The full top-100 ranking with well and producing-well counts is in the leaderboard below.
Eiger Operating Company, LLC operates the most wells in Kansas at 8,366, per Buckhead Energy analysis of public oil and gas data.
This leaderboard ranks the top 100 operators active in Kansas 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 the public oil and gas data Buckhead Energy analyzes. It is not a revenue, production-volume, or market-capitalization ranking.
Whether your operator is on this list or not, your Kansas mineral interest may be more valuable than you think. Get a free, no-obligation written offer.
Get Your Free Written OfferState: Kansas
Operators ranked: 100
Total wells: 107,901
Last refresh: 2026-11-01
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