| 5301 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 5302 | Roff Operating Company LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 5303 | Rogers County Coal Seam LLC | Ridgeland, MS 39157-8635 | Oil & Gas Operator | Mar 2015 |
| 5304 | Rogers Dan R | Okemah, OK 74847 | Oil & Gas Operator | Apr 2020 |
| 5305 | Rogers Jerry L | Cushing, OK 74023-0911 | Oil & Gas Operator | Mar 2017 |
| 5306 | Rogers Well Service Inc | Ponca City, OK 74601 | Oil & Gas Operator | Apr 2014 |
| 5307 | Rogers, Cora L | | Oil Operator | Jan 2025 |
| 5308 | Roka Management Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Feb 2025 |
| 5309 | Roka Resources Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Jan 2025 |
| 5310 | Romax Corporation | Ardmore, OK 73401-8882 | Oil & Gas Operator | Feb 2022 |
| 5311 | Romine Oil & Gas LTD | Shawnee, OK 74802-3425 | Oil & Gas Operator | Jan 2013 |
| 5312 | Ron & Dan'S Oil LTD | Barnsdall, OK 74002-0628 | Oil & Gas Operator | May 2011 |
| 5313 | Ronan Company | Springfield, MO 65704 | Oil & Gas Operator | Aug 2013 |
| 5314 | Ronco Energy Resources Inc | Norman, OK 73072 | Oil & Gas Operator | Apr 2015 |
| 5315 | Rongey Ira E | Sapulpa, OK 74066-9317 | Oil & Gas Operator | May 2013 |
| 5316 | Rongey Oil | Jenks, OK 74037-3621 | Oil & Gas Operator | Jan 2013 |
| 5317 | Ronmar Engineering & Expl Inc | Ada, OK 74820-1402 | Oil Operator | Aug 2013 |
| 5318 | Root W C | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2021 |
| 5319 | Roring Arthur | Ratliff City, OK 73481 | Oil Operator | Jan 2025 |
| 5320 | Roring Jr Roy W | Duncan, OK 73533-3048 | Oil & Gas Operator | Aug 2022 |
| 5321 | Roring Roy W | Ardmore, OK 73401 | Oil & Gas Operator | Dec 1998 |
| 5322 | Roring Steven A | Ratliff City, OK 73481-0206 | Oil Operator | Feb 2018 |
| 5323 | Rose Dan And Bill | Henryetta, OK 74437-1450 | Oil & Gas Operator | Jan 2025 |
| 5324 | Rose David | | Oil & Gas Operator | Jul 1995 |
| 5325 | Rose Operating Company | Tulsa, OK 74101-2391 | Oil & Gas Operator | Dec 2014 |
| 5326 | Rose Petroleum Corp | Oklahoma City, OK 73146 | Oil & Gas Operator | Feb 2015 |
| 5327 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | Jan 2025 |
| 5328 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 5329 | Rosenthal Henry & Co | | Oil Operator | Feb 1994 |
| 5330 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2025 |
| 5331 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 5332 | Ross Bobby L | Okmulgee, OK 74447-8802 | Oil & Gas Operator | Apr 2020 |
| 5333 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 5334 | Roth Gary E | Tonkawa, OK 74653-2033 | Oil & Gas Operator | Jan 2020 |
| 5335 | Rougeot Oil & Gas Corp | Sperry, OK 74073 | Oil & Gas Operator | Jan 2025 |
| 5336 | Roulston Pat | Konawa, OK 74849-4020 | Oil Operator | Jan 2025 |
| 5337 | Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Feb 2025 |
| 5338 | Rountree Productions LLC | | Oil Operator | Jan 2025 |
| 5339 | Rover Operating, LLC | Chicago, IL 60606 | Oil & Gas Operator | Feb 2025 |
| 5340 | Rowe Energy | Beggs, OK 74421-0240 | Oil & Gas Operator | Mar 2015 |
| 5341 | Rowe Stephen Oil Properties LLC | Hunt, TX 78024 | Oil & Gas Operator | Apr 2020 |
| 5342 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Feb 2025 |
| 5343 | Roxanna Oil Company | Oklahoma City, OK 73120-2717 | Oil Operator | Aug 2016 |
| 5344 | Roy G Oil Company | Drumright, OK 74030-1236 | Oil & Gas Operator | Oct 1995 |
| 5345 | Roy L Ashton Oil & Gas Production Inc | Sapulpa, OK 74066 | Oil Operator | Jan 2025 |
| 5346 | Royal Drilling Inc | Russell, KS 67665 | Oil Operator | Dec 2024 |
| 5347 | Royal Energy Resources LTD | Denver, CO 80221 | Oil & Gas Operator | May 2013 |
| 5348 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 5349 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 5350 | Royal Petroleum | Baytown, TX 77521 | Oil & Gas Operator | Aug 2003 |
| 5351 | Royal Petroleum Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jan 2025 |
| 5352 | Royale Energy Inc | San Diego, CA 92108-4518 | Oil & Gas Operator | Dec 2024 |
| 5353 | Royalty Energy Development LLC | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 5354 | Royalty Petroleum Company | Oklahoma City, OK 73120 | Gas Operator | Feb 2002 |
| 5355 | Roye Realty & Developing Inc | Stigler, OK 74462-0148 | Gas Operator | Dec 2004 |
| 5356 | Rozen H H | | Oil Operator | Aug 2022 |
| 5357 | RPM Oilfield Services LLC | Lindsay, OK 73052-8005 | Oil & Gas Operator | Jan 2025 |
| 5358 | RR Oil Well Operations LLC | Ringwood, OK 73768 | Oil & Gas Operator | Feb 2025 |
| 5359 | RTB Oil Inc | Crescent, OK 73028-0686 | Oil Operator | May 2016 |
| 5360 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Apr 2025 |
| 5361 | RTD Inc | Bartlesville, OK 74006 | Oil Operator | Jan 1995 |
| 5362 | Rue Johnny B | Duncan, OK 73533-2019 | Oil & Gas Operator | Jan 2025 |
| 5363 | Ruh Oil Company | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2024 |
| 5364 | Rumley Robert A & Associates | Tulsa, OK 74135-1907 | Oil Operator | Feb 2025 |
| 5365 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Dec 2024 |
| 5366 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Apr 2025 |
| 5367 | Rush-Andrus Engineering | Royse City, TX 75189-1210 | Oil & Gas Operator | Feb 2022 |
| 5368 | Russell Carl G | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 5369 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Jan 2025 |
| 5370 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 5371 | Russell, John R | | Oil Operator | Sep 2024 |
| 5372 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2025 |
| 5373 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | Jan 2025 |
| 5374 | RW Oil & Gas LLC | Lamont, OK 74643 | Oil & Gas Operator | Feb 2025 |
| 5375 | Rwit Company Inc | Tulsa, OK 74131-4255 | Oil & Gas Operator | Jul 2018 |
| 5376 | Ry-Co Petroleum | Wann, OK 74083-2052 | Oil & Gas Operator | Feb 2017 |
| 5377 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 5378 | Ryan Petroleum Operating Inc | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | May 1999 |
| 5379 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 5380 | S & B Oil Company | Wyonna, OK 74084 | Oil & Gas Operator | Nov 2005 |
| 5381 | S & C Resources Inc | Cleveland, OK 74020 | Oil Operator | Jan 2025 |
| 5382 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Jan 2025 |
| 5383 | S & H Tank Service Of Okla | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2017 |
| 5384 | S & J Oil | Hays, KS 67601 | Oil & Gas Operator | Jan 2025 |
| 5385 | S & J Oil Company | Ellinwood, KS 67526 | Oil Operator | Jun 2000 |
| 5386 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 5387 | S & K Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jul 1994 |
| 5388 | S & M Production Inc | Pawnee, OK 74058 | Oil & Gas Operator | Aug 2023 |
| 5389 | S & S Energy | Englewood, CO 80112 | Oil & Gas Operator | Mar 2015 |
| 5390 | S & S Oil | Ponca City, OK 74601 | Oil & Gas Operator | Dec 2009 |
| 5391 | S & S Oil & Gas Corporation | Okemah, OK 74859-0659 | Oil & Gas Operator | Sep 2014 |
| 5392 | S & S Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2016 |
| 5393 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 5394 | S & S Production Company | Addison, TX 75001 | Oil Operator | Jul 2024 |
| 5395 | S & S Star Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2023 |
| 5396 | S & T SWD LLC | Clinton, OK 73601-3130 | Oil Operator | Feb 2017 |
| 5397 | S & W Engine Supply | Oklahoma City, OK 73107 | Oil Operator | Jun 2003 |
| 5398 | S & W Engine Supply Inc | Oklahoma City, OK 73143 | Oil Operator | Jan 2000 |
| 5399 | S & W Transports Inc | Velma, OK 73491 | Oil Operator | Dec 2024 |
| 5400 | S A C Operating Inc | Woodward, OK 73802-1749 | Oil & Gas Operator | Jan 1999 |