| 5101 | RPM Oilfield Services LLC | Lindsay, OK 73052-8005 | Oil & Gas Operator | Mar 2025 |
| 5102 | RR Oil Well Operations LLC | Ringwood, OK 73768 | Oil & Gas Operator | Apr 2025 |
| 5103 | RTB Oil Inc | Crescent, OK 73028-0686 | Oil Operator | May 2016 |
| 5104 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Jun 2025 |
| 5105 | RTD Inc | Bartlesville, OK 74006 | Oil Operator | Jan 1995 |
| 5106 | Rue Johnny B | Duncan, OK 73533-2019 | Oil & Gas Operator | Jan 2025 |
| 5107 | Ruh Oil Company | Collinsville, OK 74021 | Oil & Gas Operator | Mar 2025 |
| 5108 | Rumley Robert A & Associates | Tulsa, OK 74135-1907 | Oil Operator | Apr 2025 |
| 5109 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Feb 2025 |
| 5110 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Jun 2025 |
| 5111 | Rush-Andrus Engineering | Royse City, TX 75189-1210 | Oil & Gas Operator | Feb 2022 |
| 5112 | Russell Carl G | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 5113 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Jan 2025 |
| 5114 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 5115 | Russell, John R | | Oil Operator | Mar 2025 |
| 5116 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Jun 2025 |
| 5117 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2025 |
| 5118 | RW Oil & Gas LLC | Lamont, OK 74643 | Oil & Gas Operator | Apr 2025 |
| 5119 | Rwit Company Inc | Tulsa, OK 74131-4255 | Oil & Gas Operator | Jul 2018 |
| 5120 | Ry-Co Petroleum | Wann, OK 74083 | Oil & Gas Operator | Feb 2017 |
| 5121 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 5122 | Ryan R Roberts Cattle Co LLC | Sand Springs, OK 74063 | Oil Operator | Mar 2025 |
| 5123 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 5124 | S & C Resources Inc | Cleveland, OK 74020 | Oil Operator | Mar 2025 |
| 5125 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Apr 2025 |
| 5126 | S & H Tank Service Of Okla | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2017 |
| 5127 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 5128 | S & K Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jul 1994 |
| 5129 | S & M Production Inc | Pawnee, OK 74058 | Oil & Gas Operator | Aug 2023 |
| 5130 | S & S Energy | Englewood, CO 80112 | Oil & Gas Operator | Mar 2015 |
| 5131 | S & S Oil & Gas Corporation | Okemah, OK 74859-0659 | Oil & Gas Operator | Sep 2014 |
| 5132 | S & S Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2016 |
| 5133 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jun 2025 |
| 5134 | S & S Production Company | Addison, TX 75001 | Oil Operator | Jul 2024 |
| 5135 | S & S Star Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2023 |
| 5136 | S & T SWD LLC | Clinton, OK 73601-3130 | Oil Operator | Feb 2017 |
| 5137 | S & W Engine Supply | Oklahoma City, OK 73107 | Oil Operator | Jun 2003 |
| 5138 | S & W Engine Supply Inc | Oklahoma City, OK 73143 | Oil Operator | Jan 2000 |
| 5139 | S & W Transports Inc | Velma, OK 73491 | Oil Operator | Mar 2025 |
| 5140 | S A C Operating Inc | Woodward, OK 73802-1749 | Oil & Gas Operator | Jan 1999 |
| 5141 | S H Production LLC | Tulsa, OK 74130-1418 | Oil & Gas Operator | Mar 2025 |
| 5142 | S J Murphy Oil And Gas Inc | | Oil & Gas Operator | Mar 2025 |
| 5143 | S J Oil Co. | Ellinwood, KS 67526 | Oil Operator | Jun 2000 |
| 5144 | S M Brothers Investments LLC | Denver, CO 80210-6059 | Oil Operator | Mar 2025 |
| 5145 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 2025 |
| 5146 | S O S Recovery Inc | Enid, OK 73703-2403 | Oil & Gas Operator | Jul 2023 |
| 5147 | S R W Oil | Laverne, OK 73848 | Oil & Gas Operator | Sep 2024 |
| 5148 | S T Industries Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2011 |
| 5149 | S/H Petroleum Corporation | Hennessey, OK 73742-0477 | Oil & Gas Operator | Feb 2016 |
| 5150 | Sabco Operating Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2018 |
| 5151 | Saber Industries LP | Dallas, TX 75254 | Oil Operator | Dec 2024 |
| 5152 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 5153 | Sabine Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 5154 | Sabos George U | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2013 |
| 5155 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 5156 | Sac & Fox Nation | | Oil & Gas Operator | Nov 2024 |
| 5157 | Safe Earth Management Inc | | Oil Operator | Nov 2021 |
| 5158 | Safe Earth Management LLC | Hammon, OK 73650 | Oil Operator | Sep 2024 |
| 5159 | Safire Resources LLC (Osage Only) | | Oil & Gas Operator | Mar 2025 |
| 5160 | Sage Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Nov 1998 |
| 5161 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Jun 2025 |
| 5162 | Sage NR Ok LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 5163 | Sagely, Floyd E Properties, LTD | Fort Smith, AR 72917-0308 | Gas Operator | Jan 2015 |
| 5164 | Saiber Michael L & Lora L | Saxonburg, PA 16056 | Oil Operator | Mar 1997 |
| 5165 | Sajac Energy Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Apr 2025 |
| 5166 | Sallee Oil Corporation | Collinsville, OK 74021 | Oil & Gas Operator | Mar 2025 |
| 5167 | Salt Creek Energy Company LLC | Shawnee, OK 74802-1505 | Oil & Gas Operator | Mar 2025 |
| 5168 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Jun 2025 |
| 5169 | Salt Fork Producers Inc | Pond Creek, OK 73766 | Oil & Gas Operator | Jan 1995 |
| 5170 | Salty Dog Disposal LLC | Cement, OK 73017 | Oil Operator | Apr 2025 |
| 5171 | Sam W Mays Jr LLC | Eureka, KS 67045 | Oil & Gas Operator | Apr 2018 |
| 5172 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 5173 | Samhill LLC | Tonkawa, OK 74653-5533 | Oil & Gas Operator | Mar 2025 |
| 5174 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 5175 | Samson Exploration LLC | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2025 |
| 5176 | Samson Gas Producing Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 5177 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 5178 | Samson Oil Company | | Oil & Gas Operator | Feb 2001 |
| 5179 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 5180 | Samuel Joe L | Tulsa, OK 74135-7805 | Oil & Gas Operator | Jan 2001 |
| 5181 | San Francisco-Okla Pet Ex Inc | | Oil & Gas Operator | Apr 2014 |
| 5182 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Apr 2025 |
| 5183 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 5184 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 5185 | Sand Boy Production Company | Bartlesville, OK 74003-9273 | Oil & Gas Operator | Jan 2025 |
| 5186 | Sand Creek Resources LLC | Woodward, OK 73801-5222 | Oil & Gas Operator | Apr 2025 |
| 5187 | Sand Point LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2020 |
| 5188 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Mar 2025 |
| 5189 | Sand Resources LLC | Norman, OK 73072-4805 | Oil & Gas Operator | Aug 2012 |
| 5190 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2025 |
| 5191 | Sandia Operating Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2010 |
| 5192 | Sandler Raymond C | Los Angeles, CA 90067 | Oil Operator | Dec 1999 |
| 5193 | Sandlot Oil & Gas LLC | Gruver, TX 79040 | Oil & Gas Operator | Jun 2025 |
| 5194 | Sandpoint Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2025 |
| 5195 | Sandra Corporation (The) | Pampa, TX 79066-2474 | Gas Operator | Oct 1996 |
| 5196 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 5197 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jun 2025 |
| 5198 | Sandrock Energy LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2025 |
| 5199 | Sandstone Hills Energy Inc | Seminole, OK 74818-1938 | Oil & Gas Operator | Sep 2014 |
| 5200 | Sandstone Resources, Inc. | Houston, TX 77043 | Oil & Gas Operator | Jun 2025 |