| 101 | JNC Resources Company | Tulsa, OK 74119 | Gas Operator | May 1999 |
| 102 | Jones Energy, LTD. | Austin, TX 78746 | Oil & Gas Operator | Sep 2013 |
| 103 | JTL Operating Co Inc | Katy, TX 77450 | Oil & Gas Operator | Jun 2026 |
| 104 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jun 2026 |
| 105 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Jun 2026 |
| 106 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 107 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 108 | Kimbrel Oil Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2026 |
| 109 | Kismet Properties, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2026 |
| 110 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 111 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Jun 2026 |
| 112 | Lasater & Co, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Jun 2026 |
| 113 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Jun 2026 |
| 114 | Lera | Borger, TX 79007 | Oil & Gas Operator | Jun 2026 |
| 115 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 116 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 117 | Linn Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 118 | Luxor Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2017 |
| 119 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 120 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Feb 2026 |
| 121 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 122 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 123 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 124 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 125 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 126 | Min-Tex Oil Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Dec 1996 |
| 127 | Mistex Operating, Inc. | Lewisville, TX 75029 | Oil & Gas Operator | Jun 2026 |
| 128 | Mitchell Ehrlich Oil & Gas, LLC | Austin, TX 78746 | Oil & Gas Operator | Jun 2026 |
| 129 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 130 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 131 | Mountainside Energy Operating, L | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 132 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 133 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 134 | Myriad Resources Corporation | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 135 | Nadel & Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 136 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 137 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Jun 2026 |
| 138 | North Country Energy LLC | Amarillo, TX 79159 | Oil & Gas Operator | Jun 2026 |
| 139 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Jun 2026 |
| 140 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
| 141 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Jun 2026 |
| 142 | Oklahoma Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Feb 2020 |
| 143 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jun 2026 |
| 144 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 145 | Palo Duro Resources LLC | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 146 | Pan Western Energy Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2026 |
| 147 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 148 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2026 |
| 149 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 150 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 151 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 152 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2026 |
| 153 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Jun 2026 |
| 154 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 155 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 156 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 157 | Pitchfork Investments, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Jun 2026 |
| 158 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 159 | Pony Oil Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2001 |
| 160 | Protege Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2018 |
| 161 | Questa Energy Corporation | Amarillo, TX 79159 | Oil & Gas Operator | Jun 2026 |
| 162 | Questa Operating Company, LLC | Amarillo, TX 79159 | Oil & Gas Operator | Jun 2026 |
| 163 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 164 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 165 | Ramco Operating Company | Tulsa, OK 74135 | Oil & Gas Operator | Jan 1998 |
| 166 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 167 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 168 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2026 |
| 169 | Remnant Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2026 |
| 170 | Revelation Oil & Gas LLC | Dumas, TX 79029 | Oil & Gas Operator | Jun 2026 |
| 171 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 172 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Jun 2026 |
| 173 | Rockwell Energy Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2014 |
| 174 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Jun 2026 |
| 175 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 176 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 177 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 178 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 179 | Schmid Properties, Inc. | Hico, TX 76457 | Oil & Gas Operator | Jun 2026 |
| 180 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Jun 2026 |
| 181 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 182 | Sheridan Energy,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2000 |
| 183 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 184 | Sidwell Operating Company, L.P. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2026 |
| 185 | SNW Operating Company | Borger, TX 79008 | Oil & Gas Operator | Jun 2026 |
| 186 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 187 | Spring Resources, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2007 |
| 188 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 189 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 190 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 191 | Taylor, Gordon Oil Company | Sunray, TX 79086 | Oil & Gas Operator | Apr 1996 |
| 192 | Taylor, Gordon Oil Company, LP | Sunray, TX 79086 | Oil & Gas Operator | Feb 2014 |
| 193 | Tess Oil Company | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 194 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Jun 2026 |
| 195 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Jun 2026 |
| 196 | Travelers Oil Company | Amarillo, TX 79102 | Oil & Gas Operator | Jun 2026 |
| 197 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 198 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 199 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 200 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Jun 2026 |