| 1 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 2 | Aikman Oil Corp. | Oklahoma City, OK 73157 | Oil & Gas Operator | May 2025 |
| 3 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | May 2025 |
| 4 | Alexander-Loop Oil Prop. Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Nov 1998 |
| 5 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 6 | Arcadia Expl. & Prod. Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2011 |
| 7 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 8 | Ark-La-Tex Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | May 2025 |
| 9 | Atlantis Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | May 2025 |
| 10 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 11 | Barbee, Bill J. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1994 |
| 12 | Bay-Tech Operating Co., Inc. | Tyler, TX 75713 | Oil & Gas Operator | Mar 2024 |
| 13 | Blazer Resources, Inc. | Leesburg, TX 75451 | Oil & Gas Operator | May 2025 |
| 14 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 15 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 16 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 17 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | May 2025 |
| 18 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 19 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | May 2025 |
| 20 | Crow, David | Shreveport, LA 71106 | Oil & Gas Operator | May 2001 |
| 21 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 22 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
| 23 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | May 2025 |
| 24 | Dimock Operating Company | Frisco, TX 75034 | Oil & Gas Operator | May 2025 |
| 25 | Edco Energy, Inc. | Austin, TX 78738 | Oil & Gas Operator | May 2003 |
| 26 | Enbridge G & P (East Texas) L.P. | Houston, TX 77056 | Oil & Gas Operator | Sep 2018 |
| 27 | Enbridge Pipelines (Ne Texas) LP | Houston, TX 77002 | Oil & Gas Operator | Jan 2010 |
| 28 | Energy Resources Oil & Gas Corp. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 1994 |
| 29 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 30 | European-Southwest Co. | Houston, TX 77254 | Oil & Gas Operator | May 2025 |
| 31 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 32 | Fair Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Dec 2000 |
| 33 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 34 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | May 2025 |
| 35 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 36 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 37 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | May 2025 |
| 38 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | May 2025 |
| 39 | Gulftex Operating Inc | Plano, TX 75093 | Oil & Gas Operator | May 2025 |
| 40 | H & S Drilling Co Inc | Frazeysburg, OH 43822-0040-0040 | Oil & Gas Operator | Dec 2016 |
| 41 | Harbor Petroleum, LLC | Granbury, TX 76049 | Oil & Gas Operator | May 2025 |
| 42 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2025 |
| 43 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 44 | Horizon Prod. And Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | May 2025 |
| 45 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 46 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 47 | Jack Co | Indiana, PA 15701-0697 | Oil & Gas Operator | Dec 2013 |
| 48 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | May 2025 |
| 49 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 50 | Key Energy Services, LLC | Houston, TX 77042 | Oil Operator | Jan 2025 |
| 51 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 52 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | May 2025 |
| 53 | Koch Midstream Services Company | Wichita, KS 67201 | Oil & Gas Operator | Oct 2000 |
| 54 | Larson, Perry L Operating Co Inc | Dallas, TX 75382 | Oil & Gas Operator | Feb 2021 |
| 55 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2025 |
| 56 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 57 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 58 | Lindenmuth & Associates, Etex | Austin, TX 78703 | Oil & Gas Operator | Jun 2002 |
| 59 | Magnum Petroleum, Inc. | Palm Desert, CA 92260 | Oil & Gas Operator | Nov 2013 |
| 60 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 61 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 62 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | May 2025 |
| 63 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 64 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 65 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2025 |
| 66 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | May 2025 |
| 67 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 68 | Noonday Exploration, LLC | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 69 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | May 2025 |
| 70 | Oto, Co. | Woodward, OK 73802 | Oil & Gas Operator | Jun 1998 |
| 71 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 72 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 73 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | May 2025 |
| 74 | Revard Petroleum, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | May 2025 |
| 75 | Ridgeway Exco, Inc. | San Antonio, TX 78279 | Oil & Gas Operator | Mar 1996 |
| 76 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 77 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 78 | Sabio Oil & Gas Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 79 | Safari Production Company, Inc. | McAllen, TX 78501 | Oil & Gas Operator | May 2025 |
| 80 | Salt Creek Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Dec 1993 |
| 81 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 82 | Saxet Operating Co.,Inc. | Madisonville, TX 77864 | Oil & Gas Operator | May 2025 |
| 83 | Sedona Oil & Gas Corporation | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 84 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | May 2025 |
| 85 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | May 2025 |
| 86 | Spence, Ralph Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2023 |
| 87 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 2025 |
| 88 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | May 2025 |
| 89 | Texeast Operating Co., Inc. | Farmers BRNCH, TX 75234 | Oil Operator | May 2025 |
| 90 | Textron Southwest Inc. | Henderson, TX 75654 | Oil & Gas Operator | May 2025 |
| 91 | Textron Southwest L.L.C. | Addison, TX 75001 | Oil & Gas Operator | Oct 2004 |
| 92 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2025 |
| 93 | Upstream Properties, LLC | Southlake, TX 76092 | Oil & Gas Operator | May 2025 |
| 94 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | May 2025 |
| 95 | Vaughn Petroleum, Inc. | Dallas, TX 75219 | Oil & Gas Operator | May 2004 |
| 96 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 97 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 98 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 99 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 100 | Wo Operating Company | Tulsa, OK 74159 | Oil & Gas Operator | May 2025 |