401 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
402 | Mitchell M J | | Oil & Gas Operator | Jan 1983 |
403 | Mobil Expl & Producing North America Inc | | Oil & Gas Operator | Nov 1986 |
404 | Monahan Rex | Sterling, CO 80751 | Oil & Gas Operator | Jun 2002 |
405 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2024 |
406 | Monsanto Company | Indianapolis, IN 46280 | Oil & Gas Operator | Jan 2005 |
407 | Montex Exploration | Sugarland, TX 77478 | Oil Operator | Apr 2003 |
408 | Mosbacher Production Co. | Houston, TX 77001 | Oil & Gas Operator | Aug 1984 |
409 | Mountain Hawk Energy LLC | Athens, TX 75751 | Gas Operator | Jan 2015 |
410 | MTG Operating Inc | Ridgeland, MS 39158 | Gas Operator | Apr 2011 |
411 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Mar 2024 |
412 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
413 | Murphy Sheldon L & Loretta | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2024 |
414 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
415 | Nadel And Gussman Rockies, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2012 |
416 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
417 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
418 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Feb 2024 |
419 | National Pride Operating | Parker, CO 80134 | Oil & Gas Operator | Dec 2017 |
420 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
421 | Navigation Powder River LLC | Houston, TX 77024 | Oil & Gas Operator | Mar 2024 |
422 | Neward Corporation | FT. Worth, TX 76102 | Oil & Gas Operator | Dec 1997 |
423 | Newport Gas Partners LLC | Gillette, WY 82716 | Oil & Gas Operator | Apr 2024 |
424 | Nicolaysen G G Jr | | Oil & Gas Operator | Dec 1995 |
425 | Nicor Exploration | | Oil Operator | Jul 1993 |
426 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
427 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
428 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
429 | Nonsuch Natural Gas Inc | Naples, FL 34108 | Oil & Gas Operator | Mar 2024 |
430 | Norcen Energy Inc | | Oil Operator | Dec 1989 |
431 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | May 2024 |
432 | North Finn LLC | Casper, WY 82605 | Oil & Gas Operator | Mar 2024 |
433 | Northern Production Co | Gillette, WY 82717 | Oil & Gas Operator | Apr 2013 |
434 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2024 |
435 | Norton Frickey | Lakewood, CO 80215 | Oil & Gas Operator | Dec 2023 |
436 | Nova Energy Inc | Casper, WY 82601 | Oil & Gas Operator | Oct 2020 |
437 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | May 2024 |
438 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
439 | Oedekoven Amerifields Resources LLC | Sugar Land, TX 77478 | Oil Operator | Jan 2024 |
440 | Oedekoven Water & Hot Oil | Recluse, WY 82725 | Oil & Gas Operator | Apr 2024 |
441 | Oilfield Salvage & Service Company | Littleton, CO 80120 | Oil & Gas Operator | Mar 2024 |
442 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
443 | Oklahoma Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2013 |
444 | Olympic Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2004 |
445 | Opes Production Inc | Buffalo, WY 82834 | Gas Operator | Mar 2015 |
446 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
447 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Jan 2024 |
448 | Outlaw Oil And Gas LLC | Gillette, WY 82716 | Oil & Gas Operator | Feb 2024 |
449 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
450 | Oxy Petroleum Inc | | Oil & Gas Operator | Jan 1986 |
451 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
452 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
453 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
454 | P O & G Operating LLC | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
455 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
456 | Palo Petroleum, Inc. | Dallas, TX 75360 | Oil & Gas Operator | May 2024 |
457 | Park Robert E | | Oil Operator | May 1983 |
458 | Parker & Parsley Producing LP | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
459 | Pathfinder Energy Inc | Casper, WY 82605 | Oil & Gas Operator | Mar 2024 |
460 | Patrick Petroleum Co. | Jackson, MI 49201 | Oil & Gas Operator | Nov 1993 |
461 | Patriot Energy Resources LLC | Golden, CO 80401 | Gas Operator | Aug 2014 |
462 | Patriot Production LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2023 |
463 | Peabody Natural Gas LLC | Gillette, WY 82718 | Oil & Gas Operator | Mar 2024 |
464 | Peak Powder River Resources LLC | Durango, CO 81301 | Oil & Gas Operator | Feb 2024 |
465 | Pedco Resources Company | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2008 |
466 | Pendragon Energy Partners Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2009 |
467 | Pennaco Energy Incorporated | Gillette, WY 82718 | Oil & Gas Operator | Feb 2021 |
468 | Pennzoil Company | Midland, TX 79710-0090 | Oil & Gas Operator | Mar 2000 |
469 | Petro Search Exploration Corp | | Oil & Gas Operator | May 1993 |
470 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
471 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
472 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
473 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
474 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
475 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2024 |
476 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
477 | Petrox Resources Inc | Meeker, CO 81641 | Oil & Gas Operator | Mar 2024 |
478 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
479 | Phoenix Resources Co | | Oil & Gas Operator | Jun 1984 |
480 | Pine Haven Resources LLC | Boulder, CO 80305 | Oil Operator | Mar 2024 |
481 | Pine Ridge Petroleum LLC | Moorcroft, WY 82721 | Oil Operator | Mar 2024 |
482 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Mar 2024 |
483 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jan 2024 |
484 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
485 | PML Operating LLC | | Oil Operator | Mar 2024 |
486 | Poc-I LLC | Casper, WY 82605 | Oil & Gas Operator | Mar 2024 |
487 | Polfam Exploration Co | Denver, CO 80204 | Oil & Gas Operator | Mar 2007 |
488 | Polumbus Corp, The | Denver, CO 80202 | Oil & Gas Operator | Sep 1982 |
489 | Powder River Oil | Golden, CO 80401 | Oil & Gas Operator | Sep 2018 |
490 | Powder River Royalty Inc | | Oil & Gas Operator | Dec 1986 |
491 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | May 2024 |
492 | PRB Oil & Gas Inc | Denver, CO 80202 | Gas Operator | Jul 2008 |
493 | Preferred Pipeline Corp. | Victoria, TX 77902 | Oil & Gas Operator | Mar 2024 |
494 | Prenalta Corporation | Terrytown, NY 10591 | Oil & Gas Operator | Jan 1997 |
495 | Pride Energy Company An Oklahoma GP | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2024 |
496 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Mar 2024 |
497 | Propel Energy Company | | Oil Operator | Oct 1991 |
498 | Prospective Invest & Trad Co LTD | Tulsa, OK 74170 | Oil & Gas Operator | Aug 2005 |
499 | Provident Resources LTD | | Oil & Gas Operator | Dec 1986 |
500 | Puma Petroleum I | | Oil & Gas Operator | Dec 1988 |