1 | O'Boyle Energy Corporation | | Oil Operator | Feb 1991 |
2 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
3 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
4 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Mar 1988 |
5 | O'Meara LLC | | Oil & Gas Operator | Oct 2022 |
6 | O'Meara, Inc. | | Oil & Gas Operator | Dec 2006 |
7 | O'Sullivan & Scully, Inc. | | Oil & Gas Operator | Oct 1994 |
8 | O'Sullivan Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2000 |
9 | O. B. And Keith Whatley | | Oil Operator | Jul 1993 |
10 | O. B. Beck | | Oil Operator | Feb 1991 |
11 | O. B. Mobley | | Oil & Gas Operator | Jul 1989 |
12 | O. B. Mobley, Et Al | | Oil Operator | Jul 1989 |
13 | O. B. Whatley | | Oil Operator | Jul 1993 |
14 | O. D. Maybrier | | Oil Operator | Dec 2011 |
15 | O. F. H., Inc. | | Oil Operator | May 1990 |
16 | O. G., Inc. | | Oil & Gas Operator | Nov 1992 |
17 | O. O. Cummings | | Gas Operator | Jan 1999 |
18 | O.B. Whatley Oil Company, Inc. | | Oil Operator | Feb 2013 |
19 | O.B., Keith & Owen B. Whatley | | Oil Operator | Jul 1989 |
20 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
21 | O.I.L. Energy, Inc. | | Oil & Gas Operator | Dec 1984 |
22 | Oak Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Dec 2024 |
23 | Oak Valley Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
24 | Oakfield Energy LLC | | Oil Operator | Jun 2019 |
25 | Oakland Corporation | | Oil & Gas Operator | Dec 1981 |
26 | Oakley Oil & Gas, L.L.C. | | Oil & Gas Operator | Mar 2012 |
27 | Oasis Production Co., Inc. | | Oil & Gas Operator | Jun 1988 |
28 | Occ Operating Co. | | Oil & Gas Operator | Apr 2019 |
29 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
30 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
31 | Octagon Resources Corporation | | Oil Operator | Mar 2005 |
32 | Ody Oil Corp. | | Oil & Gas Operator | Oct 1994 |
33 | Odyssey Operating Company | | Oil & Gas Operator | Sep 2020 |
34 | Offshore Oil & Gas Inc | Houston, TX 77063 | Oil & Gas Operator | Sep 1994 |
35 | Offshore Shelf LLC | | Oil & Gas Operator | Dec 2007 |
36 | Oil & Gas Development Company | | Oil & Gas Operator | May 1991 |
37 | Oil & Gas Producers, Inc. | Topeka, KS 66604 | Oil Operator | Jun 2004 |
38 | Oil & Gas Property MGMT., Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1996 |
39 | Oil And Gas Futures, Inc. | | Oil & Gas Operator | May 1977 |
40 | Oil Country Management, Inc. | | Oil & Gas Operator | Jan 2005 |
41 | Oil Lift, Incorporated | Metairie, LA 70002 | Oil & Gas Operator | Apr 2020 |
42 | Oil Palace, Inc. | | Oil Operator | Jun 2016 |
43 | Oil Patch Operators, LLC | | Oil & Gas Operator | Jul 2005 |
44 | Oil Recovery, Inc. | | Oil Operator | Sep 1992 |
45 | Oil Reserves Corp Of America | | Oil & Gas Operator | May 2002 |
46 | Oil Well Buyers Corp. | Houston, TX 77056 | Oil & Gas Operator | Jun 2024 |
47 | Oil,Gas & Other Minerals, Inc. | | Oil & Gas Operator | Mar 1996 |
48 | Oilwell Acquisition Co. | | Oil & Gas Operator | Jun 1999 |
49 | Ok Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Feb 2013 |
50 | Ok-La-Tex Production, Inc. | | Oil & Gas Operator | Jan 1982 |
51 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
52 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
53 | Okkatahula, Inc. | | Oil Operator | Nov 1978 |
54 | Oldfield Operating Corporation | | Oil Operator | Dec 2013 |
55 | Oleum Incorporated | | Oil & Gas Operator | Mar 1996 |
56 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
57 | Oleum Operating La LLC | | Oil & Gas Operator | Nov 2022 |
58 | Oliditt Corporation | | Gas Operator | Mar 2022 |
59 | Oliditt Production Inc. | | Gas Operator | Sep 1998 |
60 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Dec 2024 |
61 | Olympic Natural Gas Company | | Oil & Gas Operator | Oct 1990 |
62 | Olympic Oil & Gas Co., Inc. | | Oil Operator | Apr 1991 |
63 | Olympic Petroleum Company | Tulsa, OK 74114 | Oil & Gas Operator | Jun 1998 |
64 | Olympic Production Company | | Oil & Gas Operator | Jul 1994 |
65 | Omeara Bros. | | Oil & Gas Operator | Oct 1982 |
66 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
67 | Omega Energy Incorporated | | Oil & Gas Operator | May 1998 |
68 | Omni Operating Company | Osage, WY 82723 | Oil & Gas Operator | Sep 2001 |
69 | Onshore Exp Cor-La Nat Res Inc | | Oil & Gas Operator | Oct 1978 |
70 | Onshore Pipeline Const Co Inc | | Oil & Gas Operator | Aug 1998 |
71 | Onyx Energy Corporation | Oklahoma City, OK 73157 | Oil & Gas Operator | May 1994 |
72 | Onyx Energy Dev Of Texas Inc. | | Oil Operator | Dec 1996 |
73 | Onyx Energy Of Texas Inc. | | Oil Operator | Dec 1996 |
74 | Onyxx Energy LLC | | Oil & Gas Operator | Mar 2017 |
75 | Opal Oil Inc. | | Oil Operator | Sep 2021 |
76 | Opmi Operating Company | Houston, TX 77057 | Oil & Gas Operator | Jun 2008 |
77 | Ops Group Limited | Houston, TX 77060 | Oil & Gas Operator | Jun 2014 |
78 | Optimistic Oil Co. | | Oil & Gas Operator | Dec 1991 |
79 | Ora Oil Company | | Oil & Gas Operator | May 2017 |
80 | Oracle Oil, LLC | | Oil & Gas Operator | Jul 2013 |
81 | Orb Exploration, L.L.C. | | Oil & Gas Operator | Jun 2017 |
82 | Orion Oil & Gas, LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2007 |
83 | Orleans Exploration Co., Inc. | | Oil & Gas Operator | Aug 1990 |
84 | Orx Resources, Inc. | | Oil & Gas Operator | Dec 2009 |
85 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
86 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
87 | Osr Oil & Gas Corp | Midland, TX 79710 | Oil & Gas Operator | Jun 2024 |
88 | Osyka Permian, LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2024 |
89 | Otis C. Coles, Jr. | | Oil & Gas Operator | Jan 1998 |
90 | Ouida Oil Co. | | Oil & Gas Operator | Apr 1999 |
91 | Output Acquisition Corp. | | Oil & Gas Operator | Jul 2010 |
92 | Owen Production Co | | Oil Operator | May 2001 |
93 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
94 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
95 | Oxtex Inc | | Oil & Gas Operator | Oct 1989 |
96 | Oxy Petroleum Inc | | Oil & Gas Operator | Jan 1986 |
97 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
98 | Ozark Production Company, Inc. | | Oil & Gas Operator | Jul 2024 |