| 101 | Rangeland Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2002 |
| 102 | Ranger 40 Petroleum, LLC | Fairfield, CT 06824 | Oil & Gas Operator | Sep 2025 |
| 103 | Ranger Investments, Inc. | Longview, TX 75605 | Oil & Gas Operator | Oct 2006 |
| 104 | Ranger O & G Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 105 | Ranger Oil Company | Canada, 00100 | Oil & Gas Operator | Sep 2001 |
| 106 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 107 | Ranjan, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2025 |
| 108 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 109 | Rannic Inc. | Baytown, TX 77521 | Oil Operator | Sep 2025 |
| 110 | Ranphil, LLC | Hiltn Head Is, SC 29928 | Oil & Gas Operator | Feb 2016 |
| 111 | Raol Company, The | Natalia, TX 78059 | Oil & Gas Operator | Sep 2025 |
| 112 | Rap Operating, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2025 |
| 113 | Raptor Petroleum Develop, LLC | Edmond, OK 73034 | Oil & Gas Operator | Sep 2025 |
| 114 | Raptor Petroleum II, LLC | Houston, TX 77251 | Oil & Gas Operator | Sep 2025 |
| 115 | Raptor Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Sep 2025 |
| 116 | Rasbury | Clyde, TX 79510 | Oil Operator | Sep 2025 |
| 117 | Rash, Terry | Corsicana, TX 75109 | Oil & Gas Operator | Sep 2025 |
| 118 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 119 | Rasmussen, Tom | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2025 |
| 120 | Rass Operating | Amarillo, TX 79124 | Oil & Gas Operator | Jul 2008 |
| 121 | Ratex Energy Inc. | Manchaca, TX 78652 | Oil & Gas Operator | Sep 2002 |
| 122 | Rathburn Land & Devel, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Aug 2003 |
| 123 | Ratliff Operating Corp. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2025 |
| 124 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Sep 2025 |
| 125 | Rattlesnake Mountain Oil LLC | Boulder City, NV 89005 | Oil & Gas Operator | Sep 2025 |
| 126 | Rattlesnake Operating Co, LLC | Plntersville, TX 77363 | Oil & Gas Operator | Sep 2025 |
| 127 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 128 | Raven Forest Operating, LLC | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Sep 2025 |
| 129 | Raven Operating Group, Inc. | Sedalia, CO 80135 | Oil & Gas Operator | Dec 2010 |
| 130 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | May 2025 |
| 131 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Sep 2025 |
| 132 | Raw Production | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 133 | Rawhide Operating, Inc. | New Braunfels, TX 78131 | Oil & Gas Operator | Sep 2025 |
| 134 | Rawlins Operating Company, LLC | Elkhart, TX 75839 | Oil & Gas Operator | Sep 2025 |
| 135 | Rawls Oil Services | Andrews, TX 79714 | Oil Operator | Sep 2025 |
| 136 | Ray - A Operating Inc. | Albany, TX 76430 | Oil Operator | Sep 2025 |
| 137 | Ray Herring Estate | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 138 | Ray Herring Operating Co., LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 139 | Ray Jr. Co., Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Sep 2025 |
| 140 | Ray Loveless Enterprises, L.L.C. | Kilgore, TX 75663 | Oil Operator | Sep 2025 |
| 141 | Ray Oil Company | Dallas, TX 75370 | Oil Operator | Dec 1989 |
| 142 | Rayalto Oil & Gas, Inc. | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2004 |
| 143 | Rayco Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2025 |
| 144 | Rayden | Midland, TX 79711 | Oil & Gas Operator | Sep 2025 |
| 145 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2025 |
| 146 | Raydon Production Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 1992 |
| 147 | Raylee Operating Company | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 148 | Raymond Oil Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | Apr 2025 |
| 149 | Raymond'S Operating, Inc. | Kamay, TX 76369 | Oil & Gas Operator | Sep 2025 |
| 150 | Raymond, WM. C. | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2025 |
| 151 | RBC Exploration Company | Tulsa, OK 74114 | Oil & Gas Operator | May 2013 |
| 152 | RBD-Shelby Agency | Dallas, TX 75283 | Oil & Gas Operator | Dec 1993 |
| 153 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 154 | RBR Oil And Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2001 |
| 155 | RBR Operating, Inc. | Luling, TX 78648 | Oil & Gas Operator | Sep 2025 |
| 156 | RBT Oil Group, LLC | Houston, TX 77043 | Oil Operator | Sep 2025 |
| 157 | Rci, L.L.C. | Abilene, TX 79606 | Oil & Gas Operator | Sep 2025 |
| 158 | RCM Engineering, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2003 |
| 159 | RCS Drilling Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 1994 |
| 160 | RCW Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Mar 2019 |
| 161 | RCW Oil, LLC | Forsan, TX 79733 | Oil & Gas Operator | Sep 2025 |
| 162 | Rcy Mineral Group, Inc. | El Campo, TX 77437 | Oil Operator | Jul 2010 |
| 163 | RDT Properties, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2012 |
| 164 | Re-Op Corp. | Houston, TX 77274 | Oil & Gas Operator | Sep 2025 |
| 165 | Reach Oil | Brownwood, TX 76801 | Oil & Gas Operator | Sep 2025 |
| 166 | Reach Oil And Gas Company Inc | Oklahoma City, OK 73118-1100 | Oil & Gas Operator | May 2025 |
| 167 | Read & Stevens, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jul 2023 |
| 168 | Reagle Production Co. | Snyder, TX 79549 | Oil & Gas Operator | Apr 2004 |
| 169 | Reata Resources | Kermit, TX 79745 | Oil & Gas Operator | Sep 2007 |
| 170 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 171 | Reavis, Tommy | San Antonio, TX 78227 | Gas Operator | Sep 2025 |
| 172 | Reb Petroleum Company | Sugar Land, TX 77478 | Oil & Gas Operator | Sep 2025 |
| 173 | Rebco Oil, Inc. | Desdemona, TX 76445 | Oil Operator | Sep 2025 |
| 174 | Rebel Energy, LTD. | Weatherford, TX 76087 | Gas Operator | Nov 2018 |
| 175 | Rebel Production Company | Kilgore, TX 75663 | Oil Operator | Sep 2025 |
| 176 | Rebel Resources LBC LLC | Sunray, TX 79086 | Gas Operator | Sep 2025 |
| 177 | Rec Well Service, Inc. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2008 |
| 178 | Rec, LLC | Pleasanton, TX 78064 | Oil & Gas Operator | Sep 2025 |
| 179 | Recoil Resources Operating, Inc. | Houston, TX 77046 | Oil & Gas Operator | Mar 2024 |
| 180 | Recon Oil Co. | Emory, TX 75440 | Oil & Gas Operator | Sep 2025 |
| 181 | Recovery Operating LP | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2025 |
| 182 | Red Arrow Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2016 |
| 183 | Red Byrd Oil, LLC | Crystal City, TX 78839 | Oil Operator | Sep 2025 |
| 184 | Red Chalk Resources LLC | Houston, TX 77218 | Oil Operator | Sep 2025 |
| 185 | Red Dove Oil & Gas, LLC | Mineral Wells, TX 76067 | Gas Operator | Sep 2025 |
| 186 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 187 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 188 | Red Gap Oil & Gas LLC | Cisco, TX 76437 | Oil & Gas Operator | Sep 2025 |
| 189 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Apr 2025 |
| 190 | Red Horse Petroleum | Dallas, TX 75240 | Oil & Gas Operator | Sep 2025 |
| 191 | Red Line Company, LTD. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 192 | Red Man Oil, Co. | Albany, TX 76430 | Oil & Gas Operator | Sep 2025 |
| 193 | Red Oak Energy Co | San Angelo, TX 76906 | Oil & Gas Operator | Sep 2025 |
| 194 | Red Oak Gas Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | Dec 2017 |
| 195 | Red Oak Oil Company, LLC | Spring, TX 77379 | Oil Operator | Sep 2025 |
| 196 | Red River Oil & Gas LLC | Cherry Hills, CO 80110 | Oil & Gas Operator | Feb 2025 |
| 197 | Red River Operating & DRLG. Co. | Electra, TX 76360 | Oil & Gas Operator | Sep 2025 |
| 198 | Red River Petroleum Inc | Tipton, OK 73570 | Oil Operator | May 2025 |
| 199 | Red Rock Oilfield Service LLC | Colorado City, TX 79512 | Oil Operator | Sep 2025 |
| 200 | Red Rock Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2015 |