| 5201 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Mar 2025 |
| 5202 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 5203 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 5204 | Sand Boy Production Company | Bartlesville, OK 74003-9273 | Oil & Gas Operator | Jan 2025 |
| 5205 | Sand Creek Resources LLC | Woodward, OK 73801-5222 | Oil & Gas Operator | Mar 2025 |
| 5206 | Sand Point LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2020 |
| 5207 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2025 |
| 5208 | Sand Resources LLC | Norman, OK 73072-4805 | Oil & Gas Operator | Aug 2012 |
| 5209 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 5210 | Sandia Operating Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2010 |
| 5211 | Sandler Raymond C | Los Angeles, CA 90067 | Oil Operator | Dec 1999 |
| 5212 | Sandlot Oil & Gas LLC | Gruver, TX 79040 | Oil & Gas Operator | May 2025 |
| 5213 | Sandpoint Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2025 |
| 5214 | Sandra Corporation (The) | Pampa, TX 79066-2474 | Gas Operator | Oct 1996 |
| 5215 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 5216 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | May 2025 |
| 5217 | Sandrock Energy LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2025 |
| 5218 | Sandstone Hills Energy Inc | Seminole, OK 74818-1938 | Oil & Gas Operator | Sep 2014 |
| 5219 | Sandstone Resources, Inc. | Houston, TX 77043 | Oil & Gas Operator | May 2025 |
| 5220 | Sandy Petroleum Inc | Shawnee, OK 74801-5634 | Oil & Gas Operator | Nov 2024 |
| 5221 | Sanford & Jenkins | Henryetta, OK 74437-1411 | Oil & Gas Operator | Mar 2015 |
| 5222 | Sanford Casondra | Ada, OK 74820-4460 | Oil & Gas Operator | May 2013 |
| 5223 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | May 2025 |
| 5224 | Sanner Jeffrey B Dba Bryant Lyn Production | Velma, OK 73491 | Oil Operator | Oct 2024 |
| 5225 | Sanner Oil Co LLC | Duncan, OK 73533 | Oil Operator | Feb 2025 |
| 5226 | Sanner Oil Company | Velma, OK 73491-0550 | Oil & Gas Operator | Jan 2014 |
| 5227 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 5228 | Sanquip LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2024 |
| 5229 | Santa Fe Braun, Inc | Dallas, TX 75240-6620 | Oil & Gas Operator | Mar 1995 |
| 5230 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 5231 | Santa Fe Energy Operating Partner LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2004 |
| 5232 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 5233 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 5234 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 5235 | Santo Resources Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 1998 |
| 5236 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 5237 | Sarkeys Inc | | Oil & Gas Operator | Dec 1998 |
| 5238 | Sasakwa Operating LLC | Oklahoma City, OK 73179-1902 | Oil & Gas Operator | Feb 2025 |
| 5239 | Sasser Company Inc (The) | Perkins, OK 74059 | Oil & Gas Operator | Jan 2025 |
| 5240 | Savage Exploration, Inc. | San Marcos, TX 78666 | Oil & Gas Operator | May 2025 |
| 5241 | Savoy Energy LP | Traverse City, MI 49685-1560-1560 | Oil & Gas Operator | Mar 2025 |
| 5242 | Saylor Weldon W | Tulsa, OK 74105-5325 | Gas Operator | Dec 1994 |
| 5243 | SBR Oil LLC | Ada, OK 74821 | Oil Operator | Feb 2025 |
| 5244 | Scambler Energy Group LTD Co | Colony, OK 73021 | Oil & Gas Operator | Mar 2025 |
| 5245 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 5246 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 5247 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 5248 | Scarth Oil & Gas Co | Amarillo, TX 79101 | Oil & Gas Operator | Feb 1999 |
| 5249 | Scavenger Oil Co., Inc. | Englewood, CO 80111 | Oil & Gas Operator | Mar 2000 |
| 5250 | Schad Jeffrey M | Mannford, OK 74044-0995 | Oil Operator | Sep 2021 |
| 5251 | Schettler William D | Fletcher, OK 73541-4117 | Oil & Gas Operator | Oct 2021 |
| 5252 | Schiff & Jackson Oil Producers | Dallas, TX 75206 | Oil & Gas Operator | Feb 2025 |
| 5253 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 5254 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | May 2025 |
| 5255 | Schonfield Harold Gene | Bristow, OK 74010 | Oil Operator | Mar 2015 |
| 5256 | Schonwald Supply Company | Oklahoma City, OK 73101-1571 | Oil & Gas Operator | May 1999 |
| 5257 | Schooley Keith A | Enid, OK 73702-0767 | Oil Operator | May 2006 |
| 5258 | Schrader Lawayne | Fort Worth, TX 76135 | Oil Operator | Mar 2019 |
| 5259 | Schroeder, Donald C | | Oil & Gas Operator | Jan 2025 |
| 5260 | Schuler Jr Chris C | Cleveland, OK 74020 | Oil Operator | Aug 2013 |
| 5261 | Schuler Oil Properties LLC | Cleveland, OK 74020 | Oil Operator | Feb 2025 |
| 5262 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 5263 | Scissortail Exploration And Production LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 5264 | Scoggins Production Company | Cleo Springs, OK 73729-9732 | Oil & Gas Operator | May 2022 |
| 5265 | Scoggins Production LLC | Enid, OK 73703-3002 | Oil & Gas Operator | Mar 2025 |
| 5266 | Scott Banes Scott Family Partnership | | Oil Operator | Dec 2024 |
| 5267 | Scott Petroleum, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 1995 |
| 5268 | Scott SR Kermit | Okarche, OK 73762 | Oil & Gas Operator | Mar 2015 |
| 5269 | Scott Wayne Oil Co | Haxton, CO 80731 | Oil & Gas Operator | Apr 2020 |
| 5270 | Scout Energy Corporation | Edmond, OK 73083-1348 | Oil & Gas Operator | Feb 2025 |
| 5271 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 5272 | SCS Newton Oil LLC | Perryton, TX 79070 | Oil & Gas Operator | May 2025 |
| 5273 | Seaboard Gas Company | Edmond, OK 73034 | Oil & Gas Operator | Feb 1999 |
| 5274 | Seagrove Resources LLC | Malakoff, TX 75148 | Oil & Gas Operator | Feb 2025 |
| 5275 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 5276 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 5277 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 5278 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 5279 | Seahawk Oil International Inc | Newport Beach, CA 92660 | Oil & Gas Operator | Oct 1997 |
| 5280 | Seal Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2006 |
| 5281 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 5282 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 5283 | Sean M Sharp LLC | Chalk Hill, PA 15421 | Oil & Gas Operator | Mar 2025 |
| 5284 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Feb 2025 |
| 5285 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 5286 | Searcy Brothers Inc | Tulsa, OK 74135-0433 | Oil Operator | Jun 2004 |
| 5287 | Sears Joe M | Bethany, OK 730084841 | Oil & Gas Operator | May 2013 |
| 5288 | Sears M N | Oklahoma City, OK 73143 | Oil & Gas Operator | Apr 2015 |
| 5289 | Seay Dennis Regan | | Oil Operator | Jan 2001 |
| 5290 | Sec Production Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Feb 2025 |
| 5291 | Sedna Energy LLC | Blanchard, OK 73010-8043 | Gas Operator | Apr 2017 |
| 5292 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 5293 | Selby Larry Monroe | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 5294 | Selco Oil And Gas Inc | Alamo, CA 94507 | Oil & Gas Operator | Feb 2025 |
| 5295 | Select Exploration Group LLC | Eufaula, OK 74432 | Oil & Gas Operator | May 2024 |
| 5296 | Select Operating Company Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2014 |
| 5297 | Sell Drilling LLC | | Oil Operator | Feb 2011 |
| 5298 | Sell Well Servicing Company Osage Only | | Oil & Gas Operator | Nov 2019 |
| 5299 | Sell, David E | | Oil Operator | Feb 2025 |
| 5300 | Sellers Donald J | Depew, OK 74028-2442 | Oil Operator | Jan 2013 |