| 1 | I & F Oil And Farm | | Oil & Gas Operator | Dec 2009 |
| 2 | I & M Oil Production, LLC | Overland Park, KS 66209 | Oil & Gas Operator | Nov 2019 |
| 3 | Ia Operating, Inc. | Edmond, OK 73003 | Oil Operator | Sep 2025 |
| 4 | Iantha Resources LLC | Garnett, KS 66032 | Oil Operator | Dec 2019 |
| 5 | Iconic Oil & Gas LLC | Dallas, TX 75229 | Gas Operator | Sep 2025 |
| 6 | Iep Kansas Gas, LLC | Burlington, CO 80807 | Oil & Gas Operator | Dec 2025 |
| 7 | Igwt, Inc. | Rose Hill, KS 67133 | Oil & Gas Operator | Sep 2025 |
| 8 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2025 |
| 9 | Imperator Investments LLC | Shawnee, KS 66217 | Oil Operator | Aug 2024 |
| 10 | Imperial American Oil Corporation | Wichita, KS 67205 | Oil Operator | Dec 2009 |
| 11 | Imperial Oil & G | | Gas Operator | Jan 1990 |
| 12 | Imperial Oil And Gas, Inc. | Wichita, KS 67202 | Gas Operator | Jun 2002 |
| 13 | Imperial Oil Com | | Oil & Gas Operator | Dec 1992 |
| 14 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 15 | Imperial Oil Properties, Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jun 2006 |
| 16 | Impetro Nonop LLC | | Oil Operator | Sep 2025 |
| 17 | Inca Oil Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2009 |
| 18 | Incline Reserves | | Oil Operator | Apr 1988 |
| 19 | Independence Energy LLC | | Oil Operator | Sep 2025 |
| 20 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Feb 2026 |
| 21 | Indian Wells Oil | | Oil & Gas Operator | Jul 1995 |
| 22 | Indiek, John | Offerle, KS 67563 | Oil Operator | Nov 2005 |
| 23 | Inferno Energy | Yates Center, KS 66783 | Oil Operator | Sep 2025 |
| 24 | Infinity Oil, Inc. | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 25 | Inlan Oceans, LLC | Coffeyville, KS 67337 | Oil Operator | Jun 2025 |
| 26 | Innes Petroleum | | Oil Operator | Nov 1994 |
| 27 | Integrated Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 28 | Integrated Petroleum Corporation | Denver, CO 80202 | Oil Operator | Jan 2010 |
| 29 | Inter-American Energy Corp. | Toronto, On Canada M5a1n1, 33139 | Gas Operator | Dec 2019 |
| 30 | Inter-State Ener | | Oil Operator | Oct 1987 |
| 31 | Intergy, Inc. | Lomita, CA 90717 | Oil Operator | Jun 1997 |
| 32 | Interior Oil Cor | | Gas Operator | Jun 1990 |
| 33 | Interior Oil Corporation | Derby, KS 67037 | Oil & Gas Operator | Jan 2023 |
| 34 | Intermountain Refining Co, Inc | Farmington, NM 87499 | Gas Operator | Aug 2006 |
| 35 | International Ventures Inc | Pogasa Springs, CO 81147 | Oil Operator | Jul 1996 |
| 36 | Intrepid Energy Corporation | Independence, KS 67301 | Oil Operator | Mar 2016 |
| 37 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Nov 2025 |
| 38 | Investors Drilli | | Gas Operator | Jan 1993 |
| 39 | Ipas Oil Company LLC | Pratt, KS 67124 | Oil Operator | Dec 2019 |
| 40 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 41 | Isern, James R. | Wichita, KS 67277 | Oil Operator | Apr 1996 |
| 42 | Isern-Schultz Oi | | Oil & Gas Operator | Jul 1988 |
| 43 | Isis Operating Inc | Russell, KS 67665 | Oil Operator | Dec 2019 |
| 44 | Iuka-Carmi Development LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2025 |
| 45 | Ivan Holt Well Servicing Inc | Edmond, OK 73003 | Oil Operator | Aug 1999 |