| 1 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Jun 2025 |
| 2 | Allison J A | | Oil & Gas Operator | Nov 1995 |
| 3 | Alpha Management | | Oil & Gas Operator | Jan 1994 |
| 4 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 5 | Amoco Production | | Oil & Gas Operator | Jun 2012 |
| 6 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 7 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 8 | Anadarko Petroleum Co | Houston, TX 77227 | Oil & Gas Operator | Feb 1998 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 10 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 11 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 12 | Beren Corporatio | | Oil & Gas Operator | Dec 1995 |
| 13 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 14 | Berexco Inc. | Wichita, KS 67208 | Oil & Gas Operator | Oct 2009 |
| 15 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 16 | Beymer & Beymer | | Gas Operator | Dec 2009 |
| 17 | Bone, Sally L. | Woodland Park, CO 80866 | Gas Operator | Jun 2025 |
| 18 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 19 | Brazos Petroleum | | Oil & Gas Operator | Aug 1995 |
| 20 | Brigco LLC | Lakin, KS 67860 | Gas Operator | Dec 2023 |
| 21 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Jul 2025 |
| 22 | Chesapeake Energy Ma | | Gas Operator | Jun 2016 |
| 23 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 24 | Chevron U S A In | | Oil & Gas Operator | Sep 2000 |
| 25 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 26 | Cig Exploration | Denver, CO 80201 | Oil & Gas Operator | Sep 1999 |
| 27 | Cimarex Energy Co. | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 28 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Jun 2025 |
| 29 | Coastal Oil & Ga | | Oil & Gas Operator | Oct 1996 |
| 30 | Continental Energy | Garden City, KS 67846-0918 | Oil & Gas Operator | Jul 2017 |
| 31 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 32 | Daystar Petroleum, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Jun 2025 |
| 33 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 34 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Jun 2025 |
| 35 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 36 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 37 | Ensign Oil & Gas Inc. | | Oil & Gas Operator | Jul 1993 |
| 38 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 39 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Jul 2025 |
| 40 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 41 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 42 | Geo. R. Shaw Living Trust | Wichita, KS 67202 | Gas Operator | Dec 2009 |
| 43 | Griffin, Charles N. | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 44 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 45 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2025 |
| 46 | Hembree Robert F | | Oil Operator | Dec 2009 |
| 47 | Herman L. Loeb, LLC | Lawrenceville, IL 62439 | Oil & Gas Operator | Jun 2025 |
| 48 | Home-Stake Royalty Corp., The | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2014 |
| 49 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 50 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 51 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Oct 2025 |
| 52 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | Jun 2025 |
| 53 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | Jun 2025 |
| 54 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Oct 2025 |
| 55 | Lebsack Oil Production Inc. | Stafford, KS 67578 | Oil & Gas Operator | Jun 2025 |
| 56 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 57 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 58 | Marexco, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2025 |
| 59 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2025 |
| 60 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 61 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Aug 2025 |
| 62 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Jun 2025 |
| 63 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2025 |
| 64 | Midlands Gas Cor | | Gas Operator | Dec 1996 |
| 65 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 66 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Aug 2025 |
| 67 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 68 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 69 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 70 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Aug 2025 |
| 71 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 72 | Osborn Heirs Com | | Oil & Gas Operator | May 1995 |
| 73 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 74 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 75 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 76 | Pennzenergy Exploration & Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 77 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 78 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 79 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 80 | Petroleum Production Management, Inc. | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 81 | Petrosantander (USA) Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 82 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Jun 2025 |
| 83 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 84 | Plains Petroleum | | Gas Operator | Dec 1996 |
| 85 | Plains Petroleum Operating Co. | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 86 | Post & Mastin Well Service, Inc. | Garden City, KS 67846 | Oil Operator | May 2016 |
| 87 | Prairie Energy LC | Oklahoma City, OK 73118 | Gas Operator | Jun 2014 |
| 88 | PT Oil LLC | Osage City, KS 66523 | Oil & Gas Operator | Jun 2025 |
| 89 | Regency Midcon Gas LLC | Dallas, TX 75201 | Oil Operator | Oct 2014 |
| 90 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 91 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 92 | Rockin 9 Oil And Gas, LLC | Auburndale, FL 33823 | Gas Operator | Jun 2025 |
| 93 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 94 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 95 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 96 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 97 | Sdoco, LLC | Highlands Ranch, CO 80129 | Oil Operator | May 2025 |
| 98 | Shaw George R | | Oil & Gas Operator | Mar 1992 |
| 99 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 100 | Union Pacific Re | | Oil & Gas Operator | Dec 1996 |