501 | Pure Petroleum LLC | Gillette, WY 82717 | Oil & Gas Operator | Aug 2011 |
502 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2024 |
503 | Quest Operating LLC | Sheridan, WY 82801 | Gas Operator | Sep 2008 |
504 | Quicksilver Resources Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
505 | Quinoco Petroleum Inc | | Oil & Gas Operator | Dec 1990 |
506 | Quintana Petroleum Corporation | Denver, CO 80265 | Oil & Gas Operator | Mar 1998 |
507 | Rainbow Oil Company | | Oil & Gas Operator | Aug 1999 |
508 | Rainbow Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2007 |
509 | Ranch Oil Company | West Linn, OR 97068 | Oil & Gas Operator | Mar 2024 |
510 | Ranger Holdings Co | | Oil & Gas Operator | Jul 1993 |
511 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
512 | Reading & Bates Petroleum | | Oil & Gas Operator | Apr 1989 |
513 | Red Tiger Oil & Gas LLC | Gillette, WY 82718 | Oil & Gas Operator | Mar 2024 |
514 | Redbud E & P, Inc. | Spring, TX 77379 | Oil & Gas Operator | May 2024 |
515 | Redstone Resources Inc | Newcastle, WY 82701 | Gas Operator | Dec 2010 |
516 | Reef Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2007 |
517 | Renor Exploration | Englewood, CO 80111 | Oil Operator | Feb 2001 |
518 | Reserve Oil & Gas Company | | Oil & Gas Operator | Jul 1981 |
519 | Resolute Wyoming Inc | Denver, CO 80203 | Oil & Gas Operator | May 2018 |
520 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
521 | Reunion Energy Company | Houston, TX 77056 | Oil & Gas Operator | May 1996 |
522 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Feb 2024 |
523 | Ridge Energy Partners LLC | Casper, WY 82601 | Oil Operator | Dec 2018 |
524 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | May 2024 |
525 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
526 | Rochelle Oil & Gas | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
527 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
528 | Rock Oil Corporation | Lawrence, KS 66046 | Oil Operator | Oct 2004 |
529 | Rockies Resources Holdings LLC | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2024 |
530 | Rocky Mountain Gas Inc | Sheridan, WY 82801 | Gas Operator | Nov 2009 |
531 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
532 | Roff Operating Company LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
533 | Royal Resources Exploration | | Oil & Gas Operator | Mar 1984 |
534 | Ruby Drilling Company Inc | Gillette, WY 82718 | Oil Operator | Oct 2007 |
535 | Sabine Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Jul 1996 |
536 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
537 | Sabine Production Company | | Oil & Gas Operator | Oct 1990 |
538 | Saga Petroleum LLC Of Colorado | Norman, OK 73072 | Oil & Gas Operator | May 2024 |
539 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
540 | Samson Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 2024 |
541 | Samson Resources Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2021 |
542 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Apr 2024 |
543 | Sands Oil Company Inc | Billings, MT 59103 | Oil & Gas Operator | Mar 2024 |
544 | Santa Rosa Petroleum LLC | Recluse, WY 82725 | Oil & Gas Operator | Feb 2024 |
545 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
546 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | May 2024 |
547 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
548 | Seer Operating LLC | Sheridan, WY 82801 | Oil & Gas Operator | Oct 2016 |
549 | Seguro Oil & Gas Inc | | Oil Operator | Jul 1992 |
550 | Seven Sisters Oil & Gas LLC | Casper, WY 82602 | Oil & Gas Operator | Jan 2022 |
551 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
552 | Sharkey Well Service Inc | | Oil Operator | Dec 2023 |
553 | Shenandoah Energy Inc | Denver, CO 80265-1050 | Oil & Gas Operator | Dec 2014 |
554 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2024 |
555 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
556 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
557 | Six Bar Oil LLC | Pine Haven, WY 82721 | Oil Operator | Mar 2024 |
558 | Skinner Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
559 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Jan 2024 |
560 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
561 | Slaughter J M Oil Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2001 |
562 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
563 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | May 2024 |
564 | Smith Conley P Operating Co | Eglewood, CO 80112-3640 | Oil & Gas Operator | Jun 2000 |
565 | Smokey Oil Company Inc | Casper, WY 82601 | Oil & Gas Operator | Dec 1996 |
566 | Snowy Owl LLC | Gillette, WY 82717 | Oil & Gas Operator | Mar 2024 |
567 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
568 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
569 | South Coast Oil Corporation | Boulder, CO 80302 | Oil & Gas Operator | Oct 2015 |
570 | South Pass Petroleum Inc | Casper, WY 82601 | Oil & Gas Operator | Mar 2024 |
571 | Southern Oil LLC | Smackover, AR 71762 | Oil & Gas Operator | May 2022 |
572 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
573 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
574 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2024 |
575 | Spirit Energy Inc | Edmond, OK 73034 | Oil & Gas Operator | Apr 1999 |
576 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
577 | Stag Oil Producers Inc | Midland, TX 79701 | Oil & Gas Operator | Jan 1998 |
578 | Star Resources LLC | Englewood, CO 80155-5185 | Oil & Gas Operator | Dec 2013 |
579 | States Exploration Inc | | Oil Operator | Jul 1985 |
580 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
581 | Steamboat Oil And Gas LLC | Gillette, WY 82717 | Oil Operator | Mar 2024 |
582 | Stellar Oil Company | Arvada, CO 80006 | Oil & Gas Operator | Dec 1998 |
583 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Mar 2024 |
584 | Sterling Energy Corp | Denver, CO 80202 | Oil & Gas Operator | Sep 1995 |
585 | Stewart Petroleum Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Dec 2023 |
586 | Stone & Wolf LLC | Sheridan, WY 82801 | Oil & Gas Operator | Dec 2006 |
587 | Stone Petroleum Corporation | | Oil & Gas Operator | Dec 1996 |
588 | Storm Cat Energy (USA) Operating Corporation | Denver, CO 80202 | Gas Operator | Jun 2017 |
589 | Stovall Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 1998 |
590 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | May 2024 |
591 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
592 | Suncor Energy Natural Gas America Inc | Greenwood VIllage, CO 80111 | Gas Operator | Feb 2010 |
593 | Sundance Oil Exploration Co | | Oil Operator | Mar 1986 |
594 | Sunshine Valley Petroleum | Casper, WY 82605 | Oil & Gas Operator | Mar 2024 |
595 | Swenco-Western Inc | Houston, TX 77060 | Oil & Gas Operator | Jan 1997 |
596 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
597 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
598 | Taqa USA, Inc. | Centennial, CO 80111 | Oil & Gas Operator | Jul 2020 |
599 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
600 | Tbi Production Company | Lakewood, CO 80228 | Oil & Gas Operator | Oct 2004 |