| 1 | K Oil Company | Houston, TX 77005 | Oil & Gas Operator | Apr 2025 |
| 2 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2025 |
| 3 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 4 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 5 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 6 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Apr 2025 |
| 7 | Kay Production Company Inc | Seminole, OK 74868 | Oil & Gas Operator | Dec 2024 |
| 8 | Kellogg Oil Company | Henryetta, OK 74437 | Oil & Gas Operator | Oct 2024 |
| 9 | Kelloil Inc | Fort Worth, TX 76116-5600 | Oil & Gas Operator | Mar 2015 |
| 10 | Kelly Cook Oil LLC | Shawnee, OK 74804-3148 | Oil & Gas Operator | Jan 2025 |
| 11 | Kemmerer Company Inc | Tulsa, OK 74136-7027 | Oil & Gas Operator | Jan 2025 |
| 12 | Ken Snyder Inc | Newalla, OK 74857-7107 | Oil & Gas Operator | Jan 2025 |
| 13 | Kendol Exploration Inc | Oklahoma City, OK 73105-2513 | Oil & Gas Operator | Jan 2025 |
| 14 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 15 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 16 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 17 | Kerr-McGee Refining Corp | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 2007 |
| 18 | Keystone Gas Corporation | Drumright, OK 7403O | Oil & Gas Operator | Apr 2015 |
| 19 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 20 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2025 |
| 21 | Koby Oil Company LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 22 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 23 | Kopco, Inc. | Caney, KS 67333 | Oil & Gas Operator | Feb 2025 |
| 24 | Krumme Oil Company LLP | Bristow, OK 74010 | Oil & Gas Operator | Jan 2025 |
| 25 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |