1 | O G & E | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Feb 2014 |
2 | O K Swabbing Inc | Hennessey, OK 73742-0835 | Oil & Gas Operator | Jan 2024 |
3 | O'Brien Oil Corporation | Guthrie, OK 73044-3154 | Oil & Gas Operator | Jan 2024 |
4 | O'Brien Oil LLC | Guthrie, OK 73044-3154 | Oil & Gas Operator | Apr 2020 |
5 | O'Neal Oil & Gas Co | Fort Worth, TX 76107-1479 | Oil & Gas Operator | Feb 2024 |
6 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
7 | Oex-1 LLC | Tulsa, OK 74105-5153 | Oil & Gas Operator | Dec 2023 |
8 | Ofs-Tulsa Corporation | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 1997 |
9 | Oil Investors Inc | | Oil & Gas Operator | Mar 2024 |
10 | Oil Ventures LTD | | Oil & Gas Operator | Jan 2013 |
11 | Okie Crude Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
12 | Oklahoma Energy Acquisitions LP | | Oil & Gas Operator | Jan 2024 |
13 | Oklahoma Equipment & Salvage | Oklahoma City, OK 73120-5903 | Oil & Gas Operator | Mar 2015 |
14 | Oklahoma Liquid Resources Inc | Owasso, OK 74055-0841 | Oil & Gas Operator | Jan 2024 |
15 | Oklahoma Oil & Gas MGMT Inc | | Oil & Gas Operator | Jan 2024 |
16 | Oklahoma Petroleum Allies LLC | Ardmore, OK 73401 | Oil Operator | Oct 2023 |
17 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
18 | Omimex International Corporation | Fort Worth, TX 76103-2300 | Oil & Gas Operator | Jan 2024 |
19 | Oneok Gas Transportation Co | Tulsa, OK 74121-2089 | Oil & Gas Operator | Oct 2014 |
20 | Oneok Resources Company | Tulsa, OK 74102 | Oil & Gas Operator | Feb 2017 |
21 | Optima Exploration LLC | | Oil & Gas Operator | Mar 2015 |
22 | Opubco Resources Of TX Inc | Dallas, TX 75231 | Oil & Gas Operator | Sep 2005 |
23 | Orason Resources Inc | Tulsa, OK 74169-1225 | Oil & Gas Operator | Nov 2006 |
24 | Orion Exploration LLC | Tulsa, OK 74105-5153 | Oil & Gas Operator | Apr 2015 |
25 | Orion Exploration Partners LLC | | Oil & Gas Operator | Jul 2020 |
26 | Osage Exploration & Development Inc | | Oil & Gas Operator | Oct 2016 |
27 | Oso Resources LLC | | Oil & Gas Operator | Jan 2024 |
28 | Osterhout Phillip L | Drumright, OK 74030-0693 | Oil & Gas Operator | Jan 2014 |
29 | Outlaw Oil And Gas LLC | Gillette, WY 82716 | Oil & Gas Operator | Jan 2024 |
30 | Ovintiv Mid-Continent Inc. | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jan 2024 |