| 1 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 2 | R L Clampitt & Associates LLC | Bartlesville, OK 74006-3313 | Oil & Gas Operator | Feb 2024 |
| 3 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Apr 2024 |
| 4 | Ra-Jac LLC | Norman, OK 73070-4656 | Oil & Gas Operator | Feb 2024 |
| 5 | Raizen Oil Company | Velma, OK 73091 | Oil & Gas Operator | Feb 2016 |
| 6 | Raizen Oil LLC | Duncan, OK 73533-4657 | Oil & Gas Operator | Nov 2003 |
| 7 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Feb 2024 |
| 8 | Rambler Oil Co | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 1999 |
| 9 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 10 | Ramsey Nichols Operating Company LLC | | Oil & Gas Operator | Feb 2024 |
| 11 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jan 2024 |
| 12 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 13 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 14 | Raw Crude Oil & Gas LLC | Oklahoma City, OK 73104-1801 | Oil & Gas Operator | Feb 2024 |
| 15 | Raw Production LLC | Lindsay, OK 73052-0843 | Oil & Gas Operator | Jan 2024 |
| 16 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2024 |
| 17 | Rebellion Energy LLC | | Oil & Gas Operator | Jun 2022 |
| 18 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 19 | Red Fork Oil Production Inc | Mannford, OK 74044-0492 | Oil & Gas Operator | Feb 2017 |
| 20 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 21 | Red Rocks Oil & Gas Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 22 | Red Sand Resources LLC | Midland, TX 79702 | Oil Operator | Dec 2023 |
| 23 | Redbud Oil Company | Elmore City, OK 73433-8637 | Oil Operator | Feb 2024 |
| 24 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Jan 2024 |
| 25 | Renco Energy Inc | Calgary, AB T2H 0H6 | Oil & Gas Operator | Jan 2024 |
| 26 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 27 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 28 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 29 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 30 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 31 | Rico Oil Company | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 32 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 33 | Rimrock Resource Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 34 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 35 | RJ Williams Oil & Gas LLC | Ardmore, OK 73402-1931 | Oil & Gas Operator | Feb 2024 |
| 36 | Rja Energy LLC | | Oil & Gas Operator | Mar 2024 |
| 37 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2024 |
| 38 | Roan Resources LLC | | Oil & Gas Operator | Oct 2023 |
| 39 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 40 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 41 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 42 | Rocket Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Apr 2015 |
| 43 | Romax Corporation | Ardmore, OK 73401-8882 | Oil & Gas Operator | Feb 2022 |
| 44 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2024 |
| 45 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 46 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Feb 2024 |
| 47 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 48 | Rozell Harold Dba Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Feb 2024 |
| 49 | RPM Oilfield Services LLC | | Oil & Gas Operator | Jan 2024 |
| 50 | Rue Johnny B | Duncan, OK 73533-2019 | Oil Operator | Dec 2023 |
| 51 | Ruh Oil Company | Owasso, OK 74055-0841 | Oil & Gas Operator | Dec 2023 |
| 52 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Dec 2023 |
| 53 | Rustler Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 54 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |