| 1 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 2 | Palomino Petroleum | Newton, KS 67114 | Oil Operator | Oct 2003 |
| 3 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 4 | Parrish Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 5 | Pate-Dombaugh Pe | | Oil Operator | Sep 1991 |
| 6 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 7 | Pelican Hill Oil & Gas Inc | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 8 | Pendleton Land & | | Oil Operator | Aug 1985 |
| 9 | Petex Incorporat | | Oil Operator | Sep 1991 |
| 10 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 11 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 12 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 13 | Petroleum Techno | | Oil & Gas Operator | Dec 1996 |
| 14 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2025 |
| 15 | Petropro Petroleum LLC | | Oil Operator | Jun 2025 |
| 16 | Petroventures In | | Oil Operator | Apr 1987 |
| 17 | Phillips Exploration Company L.C. | Andover, KS 67002 | Oil & Gas Operator | Jun 2025 |
| 18 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 19 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 20 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Jun 2025 |
| 21 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 22 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 23 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Jun 2025 |
| 24 | Plano Petroleum | | Oil & Gas Operator | Dec 1994 |
| 25 | Pride Energy Company, A General Partnership | Tulsa, OK 74170 | Oil & Gas Operator | Aug 2021 |
| 26 | Production Drilling, Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |