301 | Ranch Oil Company | West Linn, OR 97068 | Oil & Gas Operator | Mar 2024 |
302 | Rathbun Roger | | Oil & Gas Operator | Dec 1993 |
303 | Rathpro Inc | Douglas, WY 82633 | Oil & Gas Operator | Feb 1994 |
304 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
305 | Reading & Bates Petroleum | | Oil & Gas Operator | Apr 1989 |
306 | Remuda Energy Development LLC | Billings, MT 59104 | Oil & Gas Operator | Feb 2024 |
307 | Renos Land & Minerals Company | Casper, WY 82601 | Oil & Gas Operator | Oct 2021 |
308 | Resources Investment Corp | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
309 | Reunion Energy Company | Houston, TX 77056 | Oil & Gas Operator | May 1996 |
310 | Richardson Operating Company | Denver, CO 80237 | Oil & Gas Operator | Feb 2024 |
311 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2024 |
312 | Rki Exploration & Production LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2024 |
313 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
314 | Robert Hawkins Inc | Kevin, MT 59454 | Oil & Gas Operator | Jan 2024 |
315 | Rochelle Oil & Gas | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
316 | Rockies Resources Holdings LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2024 |
317 | Rocky Mountain Gas Inc | Sheridan, WY 82801 | Gas Operator | Nov 2009 |
318 | Rosa Petroleum | Evansville, WY 82636 | Oil Operator | Dec 1995 |
319 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
320 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
321 | Samson Resources Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2021 |
322 | Sauer Bill Oil & Gas Company LLC | Casper, WY 82604 | Oil & Gas Operator | Jun 1999 |
323 | Sceptre Resources Inc | | Oil & Gas Operator | Dec 2007 |
324 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
325 | Shenandoah Oil Corporation | | Oil & Gas Operator | Jun 1979 |
326 | Sierra Trading Corporation | | Oil & Gas Operator | Sep 1978 |
327 | Skinner'S Resources & Expl Inc | | Oil & Gas Operator | Jun 2007 |
328 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Jan 2024 |
329 | Skyline Oil Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jan 1987 |
330 | Slaughter J M Oil Company | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2001 |
331 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
332 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
333 | Snowy Owl LLC | Gillette, WY 82717 | Oil & Gas Operator | Mar 2024 |
334 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
335 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
336 | South Coast Oil Corporation | Boulder, CO 80302 | Oil & Gas Operator | Oct 2015 |
337 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
338 | Southern Union Exploration | | Oil Operator | Jan 1990 |
339 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
340 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
341 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2024 |
342 | Spirit Energy Inc | Edmond, OK 73034 | Oil & Gas Operator | Apr 1999 |
343 | St Michael Exploration | | Oil & Gas Operator | Jun 1987 |
344 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
345 | Sterling Energy Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 1995 |
346 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
347 | Stone Energy LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
348 | Sunshine Valley Petroleum | Casper, WY 82605 | Oil & Gas Operator | Feb 2024 |
349 | T-Rex Oil Inc | Broomfield, CO 80021 | Oil Operator | Feb 2011 |
350 | Target Oil Company | | Oil & Gas Operator | Mar 2007 |
351 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
352 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Nov 2023 |
353 | Terex Energy Corporation | Casper, WY 82602 | Oil & Gas Operator | Aug 2019 |
354 | Terrapet Corporation | | Oil & Gas Operator | Jun 2011 |
355 | Texaco Exploration & Prod | Midland, TX 79702 | Oil & Gas Operator | Aug 2002 |
356 | The Brinkerhoff Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
357 | Thomas Operating Company Inc | Greeley, CO 80634 | Oil & Gas Operator | Aug 2008 |
358 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Apr 2024 |
359 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
360 | Timberline Production Company LLC | Casper, WY 82601 | Oil & Gas Operator | Oct 2020 |
361 | Titan Exploration LLC | Luling, TX 78648 | Oil & Gas Operator | Feb 2024 |
362 | Torch E & P Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2015 |
363 | Torch Oil & Gas Company | Houston, TX 77010 | Oil & Gas Operator | Aug 1997 |
364 | Transco Exploration Company | | Oil & Gas Operator | Jul 1989 |
365 | Transworld Systems Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Mar 2024 |
366 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2024 |
367 | Tristar Energy Corporation | Casper, WY 82602 | Oil & Gas Operator | Dec 2007 |
368 | Trout Kye Jr | | Oil & Gas Operator | Dec 2010 |
369 | True Oil LLC | Casper, WY 82602 | Oil & Gas Operator | Mar 2024 |
370 | Twin Arrow Inc | Rangely, CO 81648 | Oil & Gas Operator | Sep 2009 |
371 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
372 | U V Industries | | Oil & Gas Operator | Jan 1993 |
373 | Underwood Oil & Gas | Casper, WY 82602 | Oil & Gas Operator | Mar 2024 |
374 | Universal Fuels Company | | Oil & Gas Operator | Oct 1993 |
375 | Updike Resources Inc | Newcastle, WY 82701 | Oil & Gas Operator | Jun 1998 |
376 | Us Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Dec 2021 |
377 | USA Exploration & Production LLC | Mills, WY 82644 | Oil & Gas Operator | Sep 2012 |
378 | V A Resources LLC | Casper, WY 82601 | Oil Operator | Apr 2016 |
379 | Valkyrie Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2024 |
380 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Dec 2023 |
381 | Vicorp Energy Inc | Denver, CO 80202-4927 | Oil & Gas Operator | Mar 2001 |
382 | Vortex Petroleum Inc | Centennial, CO 80111 | Oil Operator | Jan 2024 |
383 | Wave Petroleum Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
384 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Feb 2024 |
385 | Wessely Energy Corporation | | Oil & Gas Operator | Feb 1989 |
386 | Western American Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2023 |
387 | Western Interior Energy Inc. | Denver, CO 80202 | Oil & Gas Operator | Jul 2020 |
388 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
389 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2024 |
390 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Feb 2024 |
391 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2024 |
392 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
393 | Wichita River Oil Corporation | Englewood, CO 80111 | Oil & Gas Operator | Apr 2009 |
394 | Wildfire Partners Inc | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2009 |
395 | Winco Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 1997 |
396 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
397 | Wold Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2022 |
398 | Wold Oil Properties Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2018 |
399 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
400 | WPX Energy Rocky Mountain LLC | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2024 |