| 1 | R & C Oil Company LLC | Westbrook, TX 79565 | Oil Operator | Mar 2025 |
| 2 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 3 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Mar 2025 |
| 4 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 5 | Rangeland Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2002 |
| 6 | Ranphil, LLC | Hiltn Head Is, SC 29928 | Oil & Gas Operator | Feb 2016 |
| 7 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 8 | Rasmussen, Tom | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2025 |
| 9 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Mar 2025 |
| 10 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Mar 2025 |
| 11 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 12 | RCW Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Mar 2019 |
| 13 | RCW Oil, LLC | Forsan, TX 79733 | Oil & Gas Operator | Mar 2025 |
| 14 | Reach Oil And Gas Company Inc | Oklahoma City, OK 73118-1100 | Oil & Gas Operator | Dec 2024 |
| 15 | Reatta Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 16 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Nov 2024 |
| 17 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 18 | Regal Development Inc. | Eldorado, TX 76936 | Gas Operator | Jul 1996 |
| 19 | Regions Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 20 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Mar 2025 |
| 21 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Mar 2025 |
| 22 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2025 |
| 23 | Renaud Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 24 | Resaca Operating Company | Houston, TX 77010 | Oil & Gas Operator | Sep 2013 |
| 25 | Reserve Management, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 26 | Resolute Natural Res. Co., LLC | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 27 | RHB Exploration & Production,LLC | Grapevine, TX 76099 | Oil & Gas Operator | Mar 2025 |
| 28 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 29 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 30 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 31 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Mar 2025 |
| 32 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 33 | Roc Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2013 |
| 34 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 35 | Rockin' D, LLC | Big Spring, TX 79720 | Oil & Gas Operator | Mar 2024 |
| 36 | Roden Oil Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2008 |
| 37 | Rodgers, William L. | Fort Worth, TX 76147 | Oil & Gas Operator | Jan 1995 |
| 38 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 39 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 40 | Rover Petroleum Operating, LLC | Plano, TX 75075 | Oil & Gas Operator | Mar 2025 |
| 41 | Royalty Land & Dev. Co., Inc. | Wolfforth, TX 79382 | Oil & Gas Operator | Mar 2025 |
| 42 | Royalty Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 43 | RP Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 44 | RRCH Corp. | Longview, TX 75606 | Oil & Gas Operator | Dec 2013 |
| 45 | RRG Operating, LLC | Odessa, TX 79760 | Oil & Gas Operator | Mar 2025 |
| 46 | Rrig Exploration, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Mar 2025 |
| 47 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |