3301 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
3302 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Mar 1988 |
3303 | O'Meara LLC | | Oil & Gas Operator | Oct 2022 |
3304 | O'Meara, Inc. | | Oil & Gas Operator | Dec 2006 |
3305 | O'Sullivan & Scully, Inc. | | Oil & Gas Operator | Oct 1994 |
3306 | O'Sullivan Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2000 |
3307 | O. B. And Keith Whatley | | Oil Operator | Jul 1993 |
3308 | O. B. Beck | | Oil Operator | Feb 1991 |
3309 | O. B. Mobley | | Oil & Gas Operator | Jul 1989 |
3310 | O. B. Mobley, Et Al | | Oil Operator | Jul 1989 |
3311 | O. B. Whatley | | Oil Operator | Jul 1993 |
3312 | O. D. Maybrier | | Oil Operator | Dec 2011 |
3313 | O. F. H., Inc. | | Oil Operator | May 1990 |
3314 | O. G., Inc. | | Oil & Gas Operator | Nov 1992 |
3315 | O. O. Cummings | | Gas Operator | Jan 1999 |
3316 | O.B. Whatley Oil Company, Inc. | | Oil Operator | Feb 2013 |
3317 | O.B., Keith & Owen B. Whatley | | Oil Operator | Jul 1989 |
3318 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2025 |
3319 | O.I.L. Energy, Inc. | | Oil & Gas Operator | Dec 1984 |
3320 | Oak Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
3321 | Oak Valley Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
3322 | Oakfield Energy LLC | | Oil Operator | Jun 2019 |
3323 | Oakland Corporation | | Oil & Gas Operator | Dec 1981 |
3324 | Oakley Oil & Gas, L.L.C. | | Oil & Gas Operator | Mar 2012 |
3325 | Oasis Production Co., Inc. | | Oil & Gas Operator | Jun 1988 |
3326 | Occ Operating Co. | | Oil & Gas Operator | Apr 2019 |
3327 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
3328 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
3329 | Octagon Resources Corporation | | Oil Operator | Apr 2005 |
3330 | Ody Oil Corp. | | Oil & Gas Operator | Oct 1994 |
3331 | Odyssey Operating Company | | Oil & Gas Operator | Sep 2020 |
3332 | Offshore Oil & Gas Inc | Houston, TX 77063 | Oil & Gas Operator | Sep 1994 |
3333 | Offshore Shelf LLC | | Oil & Gas Operator | Dec 2007 |
3334 | Oil & Gas Development Company | | Oil & Gas Operator | May 1991 |
3335 | Oil & Gas Producers, Inc. | Topeka, KS 66604 | Oil Operator | Jun 2004 |
3336 | Oil & Gas Property MGMT., Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1996 |
3337 | Oil And Gas Futures, Inc. | | Oil & Gas Operator | May 1977 |
3338 | Oil Country Management, Inc. | | Oil & Gas Operator | Jan 2005 |
3339 | Oil Lift, Incorporated | Metairie, LA 70002 | Oil & Gas Operator | Apr 2020 |
3340 | Oil Palace, Inc. | | Oil Operator | Jun 2016 |
3341 | Oil Patch Operators, LLC | | Oil & Gas Operator | Jul 2005 |
3342 | Oil Recovery, Inc. | | Oil Operator | Sep 1992 |
3343 | Oil Reserves Corp Of America | | Oil & Gas Operator | May 2002 |
3344 | Oil Well Buyers Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
3345 | Oil,Gas & Other Minerals, Inc. | | Oil & Gas Operator | Apr 1996 |
3346 | Oilwell Acquisition Co. | | Oil & Gas Operator | Jun 1999 |
3347 | Ok Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Feb 2013 |
3348 | Ok-La-Tex Production, Inc. | | Oil & Gas Operator | Jan 1982 |
3349 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
3350 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
3351 | Okkatahula, Inc. | | Oil Operator | Nov 1978 |
3352 | Oldfield Operating Corporation | | Oil Operator | Dec 2013 |
3353 | Oleum Incorporated | | Oil & Gas Operator | Mar 1996 |
3354 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
3355 | Oleum Operating La LLC | | Oil & Gas Operator | Nov 2022 |
3356 | Oliditt Corporation | | Gas Operator | Mar 2022 |
3357 | Oliditt Production Inc. | | Gas Operator | Sep 1998 |
3358 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Mar 2025 |
3359 | Olympic Natural Gas Company | | Oil & Gas Operator | Oct 1990 |
3360 | Olympic Oil & Gas Co., Inc. | | Oil Operator | Apr 1991 |
3361 | Olympic Petroleum Company | Tulsa, OK 74114 | Oil & Gas Operator | Jun 1998 |
3362 | Olympic Production Company | | Oil & Gas Operator | Jul 1994 |
3363 | Omeara Bros. | | Oil & Gas Operator | Oct 1982 |
3364 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
3365 | Omega Energy Incorporated | | Oil & Gas Operator | May 1998 |
3366 | Omni Operating Company | Osage, WY 82723 | Oil & Gas Operator | Sep 2001 |
3367 | Onshore Exp Cor-La Nat Res Inc | | Oil & Gas Operator | Oct 1978 |
3368 | Onshore Pipeline Const Co Inc | | Oil & Gas Operator | Aug 1998 |
3369 | Onyx Energy Corporation | Oklahoma City, OK 73157 | Oil & Gas Operator | May 1994 |
3370 | Onyx Energy Dev Of Texas Inc. | | Oil Operator | Dec 1996 |
3371 | Onyx Energy Of Texas Inc. | | Oil Operator | Dec 1996 |
3372 | Onyxx Energy LLC | | Oil & Gas Operator | Mar 2017 |
3373 | Opal Oil Inc. | | Oil Operator | Sep 2021 |
3374 | Opmi Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jun 2008 |
3375 | Ops Group Limited | Houston, TX 77060 | Oil & Gas Operator | Jun 2014 |
3376 | Optimistic Oil Co. | | Oil & Gas Operator | Dec 1991 |
3377 | Ora Oil Company | | Oil & Gas Operator | May 2017 |
3378 | Oracle Oil, LLC | | Oil & Gas Operator | Jul 2013 |
3379 | Orb Exploration, L.L.C. | | Oil & Gas Operator | Jun 2017 |
3380 | Orion Oil & Gas, LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2007 |
3381 | Orleans Exploration Co., Inc. | | Oil & Gas Operator | Aug 1990 |
3382 | Orx Resources, Inc. | | Oil & Gas Operator | Dec 2009 |
3383 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Mar 2025 |
3384 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
3385 | Osman Global Services LLC | | Oil & Gas Operator | Jan 2025 |
3386 | Osr Oil & Gas Corp | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
3387 | Osyka Permian, LLC | Houston, TX 77079 | Oil & Gas Operator | Mar 2025 |
3388 | Otis C. Coles, Jr. | | Oil & Gas Operator | Jan 1998 |
3389 | Ouachita Development Corp. | | Gas Operator | Mar 2014 |
3390 | Ouida Oil Co. | | Oil & Gas Operator | Apr 1999 |
3391 | Output Acquisition Corp. | | Oil & Gas Operator | Jul 2010 |
3392 | Owen Production Co | | Oil Operator | May 2001 |
3393 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
3394 | Oxbow EP LLC | | Oil Operator | Dec 2024 |
3395 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
3396 | Oxtex Inc | | Oil & Gas Operator | Oct 1989 |
3397 | Oxy Petroleum Inc | | Oil & Gas Operator | Jan 1986 |
3398 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
3399 | Ozark Production Company, Inc. | | Oil & Gas Operator | Jan 2025 |
3400 | P & A Oilfield Services, Inc. | | Oil & Gas Operator | Jan 1998 |