| 9501 | Royale Operating Company | San Diego, CA 92108 | Oil & Gas Operator | Apr 1996 |
| 9502 | Royalty Land & Dev. Co., Inc. | Wolfforth, TX 79382 | Oil & Gas Operator | Apr 2026 |
| 9503 | Royalty Operating, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Nov 2007 |
| 9504 | Royalty Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 9505 | Royko Oil Company | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Apr 2026 |
| 9506 | Rozzlle Operating Company, LLC | Blackwell, TX 79506 | Oil & Gas Operator | Apr 2026 |
| 9507 | RP Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 9508 | RPG Operating LLC | MC Queeney, TX 78123 | Oil Operator | Apr 2026 |
| 9509 | RPM Operating Company | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2008 |
| 9510 | RPM Petroleum, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2013 |
| 9511 | RR Ventures Limited Partnership | San Antonio, TX 78239 | Oil & Gas Operator | Apr 2026 |
| 9512 | RRCH Corp. | Longview, TX 75606 | Oil & Gas Operator | Dec 2013 |
| 9513 | RRG Operating, LLC | Odessa, TX 79760 | Oil & Gas Operator | Apr 2026 |
| 9514 | Rrig Exploration, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2026 |
| 9515 | RRP Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 9516 | RRR Exploration, Inc. | Dallas, TX 75247 | Oil & Gas Operator | May 1994 |
| 9517 | RSD Minerals LLC | Wichita, KS 67206 | Oil Operator | Dec 2025 |
| 9518 | Rse, Inc. | Houston, TX 77077 | Oil & Gas Operator | Sep 2000 |
| 9519 | RSP Permian, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2018 |
| 9520 | RTC Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 9521 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Apr 2026 |
| 9522 | RTD Inc | Bartlesville, OK 74006 | Oil Operator | Jan 1995 |
| 9523 | RTD Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 9524 | Rto Operating, LLC | San Antonio, TX 78212 | Oil Operator | Feb 2016 |
| 9525 | RTR Legacy Oil, LLC | Weatherford, TX 76087 | Oil Operator | Apr 2026 |
| 9526 | RTZ Energy, LLC | Kilgore, TX 75663 | Gas Operator | Apr 2006 |
| 9527 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 9528 | Rubis Oil, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2026 |
| 9529 | Ruby Operating Company, Inc | Clyde, TX 79510 | Oil & Gas Operator | Apr 2026 |
| 9530 | Rucker, Gary | Archer City, TX 76351 | Oil & Gas Operator | Dec 2003 |
| 9531 | Ruckus Energy Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Apr 2026 |
| 9532 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 9533 | Ruff | Albany, TX 76430 | Oil & Gas Operator | Aug 2017 |
| 9534 | Ruff Drilling Company | Albany, TX 76430 | Oil & Gas Operator | Dec 2019 |
| 9535 | Ruff Oil Co. | Albany, TX 76430 | Oil Operator | Apr 2026 |
| 9536 | Rumble Energy LLC | Skiatook, OK 74070 | Oil & Gas Operator | Apr 2026 |
| 9537 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 9538 | Running WP Oil, LLC | Loving, TX 76460 | Oil Operator | Apr 2026 |
| 9539 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Apr 2026 |
| 9540 | Rush, Charles Ray | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 9541 | Rushing Oil Co. | San Antonio, TX 78213 | Oil & Gas Operator | Apr 2026 |
| 9542 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 9543 | Rusk Energy Management, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 9544 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2026 |
| 9545 | Rusk Production Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2026 |
| 9546 | Russell - FT. Trinidad Op., LLC | Tyler, TX 75710 | Oil & Gas Operator | Apr 2026 |
| 9547 | Russell Bros. Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 9548 | Russell Brothers Oil & Gas | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2004 |
| 9549 | Russell Operating Company, LLC | Big Lake, TX 76932 | Oil Operator | Apr 2026 |
| 9550 | Russell, C. M. Oil Company | Lubbock, TX 79423 | Oil & Gas Operator | Jan 2008 |
| 9551 | Russell, L. J. Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Apr 2026 |
| 9552 | Russell, Phillip | Colorado City, TX 79512 | Oil & Gas Operator | Apr 2026 |
| 9553 | Russell, T. Operating Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2005 |
| 9554 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2026 |
| 9555 | Rust Operating Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2000 |
| 9556 | Ruth Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2010 |
| 9557 | Rutherford Oil Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2019 |
| 9558 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 9559 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Apr 2026 |
| 9560 | Rutledge, Kenny | Rising Star, TX 76471 | Oil & Gas Operator | Apr 2026 |
| 9561 | Rutledge, Rome | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1997 |
| 9562 | Rutledge-Newsom | Graham, TX 76450 | Oil Operator | Jun 2025 |
| 9563 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 9564 | RVR Operating Co. | Bedford, TX 76021 | Oil & Gas Operator | Jan 2017 |
| 9565 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 9566 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 9567 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Apr 2026 |
| 9568 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 9569 | RWS Operating Co. LLC | Kilgore, TX 75663 | Oil Operator | Apr 2026 |
| 9570 | Ryan, Joseph G. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 9571 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Apr 2026 |
| 9572 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 9573 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 9574 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Apr 2026 |
| 9575 | Rystin Oil & Gas | Sugar Land, TX 77487 | Oil & Gas Operator | Apr 2026 |
| 9576 | S & B Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Apr 2026 |
| 9577 | S & C Construction, Inc. | Whitefish, MT 59937 | Oil & Gas Operator | Oct 2025 |
| 9578 | S & H Oil Company | Vernon, TX 76384 | Oil & Gas Operator | Sep 1999 |
| 9579 | S & H Resources | Abilene, TX 79605 | Oil & Gas Operator | Apr 2026 |
| 9580 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 9581 | S & JB, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Jul 2010 |
| 9582 | S & L Oil Field Services | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Jan 1999 |
| 9583 | S & M Drilling, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2023 |
| 9584 | S & M Royalty | Andrews, TX 79714 | Oil & Gas Operator | Jan 1997 |
| 9585 | S & N Energies, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Jun 2002 |
| 9586 | S & P Energy | Benbrook, TX 76126 | Oil & Gas Operator | Oct 1994 |
| 9587 | S & P Energy, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Aug 2003 |
| 9588 | S & R Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 1993 |
| 9589 | S & R Operating | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 9590 | S & S & H Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Jul 2004 |
| 9591 | S & S Energy | Englewood, CO 80112 | Oil & Gas Operator | Mar 2015 |
| 9592 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 2026 |
| 9593 | S & S Operating | Dumas, TX 79029 | Oil Operator | Apr 2026 |
| 9594 | S & S Operating Company, Inc. | Winnie, TX 77665 | Oil & Gas Operator | Apr 2026 |
| 9595 | S & S Well Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 1998 |
| 9596 | S & T Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2001 |
| 9597 | S & V Operating | Zephyr, TX 76890 | Oil & Gas Operator | Apr 2026 |
| 9598 | S & W Oil & Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2026 |
| 9599 | S & Y Production Co. | Liberty, TX 77575 | Oil & Gas Operator | Jul 1996 |
| 9600 | S And B Gauging Services, LLC | Spring, TX 77386 | Oil Operator | Apr 2026 |