| 1401 | Robertson Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 1402 | Robertson Farms, LLC | Calhoun, KY 42327 | Oil Operator | Dec 2023 |
| 1403 | Robertson Jay Estate | Tulsa, OK 74127-3029 | Oil & Gas Operator | Jul 2013 |
| 1404 | Robertson Johnie J | Okmulgee, OK 74447-8765 | Oil & Gas Operator | Nov 2025 |
| 1405 | Robertson Resources, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Feb 2026 |
| 1406 | Robertson* Dexter | | Gas Operator | Dec 2018 |
| 1407 | Robertson, David | Bowling Green, KY 42103 | Oil Operator | Dec 2023 |
| 1408 | Robertson, French M. Oil Co. | Abilene, TX 79608 | Oil & Gas Operator | Mar 1995 |
| 1409 | Robertson, Gene Oil Co. | Burkburnett, TX 76354 | Oil & Gas Operator | Jul 1998 |
| 1410 | Robertson, Richard | Tulsa, OK 74127 | Gas Operator | Sep 2025 |
| 1411 | Robertson, T. L. Operating Co. | Cross Plains, TX 76443 | Oil & Gas Operator | May 2004 |
| 1412 | Robertson-Bryce Management, LLC | Tyler, TX 75701 | Oil & Gas Operator | Feb 2026 |
| 1413 | Robie A. Bridges III | | Oil Operator | Aug 1993 |
| 1414 | Robin Of Perryton Corporation | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 1415 | Robin Of Perryton, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Dec 1995 |
| 1416 | Robin, Jack, Co. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Dec 2017 |
| 1417 | Robinett Resources Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 1999 |
| 1418 | Robinette Oil Company LLC | Chanute, KS 66720 | Oil Operator | Sep 2025 |
| 1419 | Robinowitz Oil C | | Oil Operator | Dec 1996 |
| 1420 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 1421 | Robinowitz Oil Company, A General Partnership | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2023 |
| 1422 | Robinson Brothers Drilling Co | | Oil & Gas Operator | Jul 2002 |
| 1423 | Robinson Drilling Of Texas | Big Spring, TX 79721 | Oil & Gas Operator | Oct 1996 |
| 1424 | Robinson Energy & Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Aug 2008 |
| 1425 | Robinson Engineering & Oil Company, Inc | Evansville, IN 47716 | Oil & Gas Operator | Dec 2022 |
| 1426 | Robinson Oil & Gas, Inc. | Chico, TX 76431 | Oil & Gas Operator | Aug 2003 |
| 1427 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 1428 | Robinson Oil Com | | Oil & Gas Operator | Feb 1995 |
| 1429 | Robinson Oil Company, LLC | Billings, MT 59103 | Gas Operator | Dec 2015 |
| 1430 | Robinson Oil Inc | Eunice, NM 88231 | Oil & Gas Operator | Jun 2015 |
| 1431 | Robinson Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Aug 2012 |
| 1432 | Robinson Resource Dev. Co.Inc. | | Oil & Gas Operator | Oct 1982 |
| 1433 | Robinson Tracy D | Duncan, OK 73534 | Oil Operator | Oct 2018 |
| 1434 | Robinson, Beryl A. | Peru, KS 67360 | Oil & Gas Operator | Mar 2012 |
| 1435 | Robinson, Gary D | | Oil Operator | Nov 2025 |
| 1436 | Robinson, Irvin | Abilene, TX 79608 | Oil & Gas Operator | May 1999 |
| 1437 | Robison, J. H. & Assoc. LTD. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Apr 1996 |
| 1438 | Robison, L. E. Oil | Yates Center, KS 66783 | Oil Operator | Sep 2001 |
| 1439 | Robl-Six, Inc. | Ellinwood, KS 67526 | Oil Operator | Dec 2019 |
| 1440 | Roblyn Oil Inc | Allen, OK 74825-6933 | Oil & Gas Operator | Apr 2025 |
| 1441 | Roblyn Petroleum Corp. | | Oil & Gas Operator | May 1983 |
| 1442 | Robson & Shults Prod Corp | Mannford, OK 74044 | Oil & Gas Operator | Jun 1995 |
| 1443 | Robson Petroleum Company | Tulsa, OK 74104 | Oil & Gas Operator | Jan 1995 |
| 1444 | Robson Resources Inc | Tulsa, OK 74104 | Oil & Gas Operator | May 1998 |
| 1445 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | Feb 2026 |
| 1446 | Roc Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2013 |
| 1447 | Roc Operating, Inc. | Plano, TX 75093 | Oil & Gas Operator | Oct 2008 |
| 1448 | Roca Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1449 | Roca Production, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2026 |
| 1450 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 1451 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 1452 | Rocc Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 1453 | Rocc Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Feb 2026 |
| 1454 | Roche, E. Michael | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 1455 | Rochelle Oil & Gas | Gillette, WY 82717 | Oil & Gas Operator | Mar 2024 |
| 1456 | Rochez, Mary B. | East Amherst, NY 14051 | Gas Operator | Dec 2024 |
| 1457 | Rocinante | Houston, TX 77058 | Oil Operator | Feb 2026 |
| 1458 | Rock Bottom Oil LLC | | Oil Operator | Dec 2024 |
| 1459 | Rock Bottom Oil, GP, L.L.C. | Nacogdoches, TX 75963 | Oil & Gas Operator | Feb 2026 |
| 1460 | Rock Creek Crude, LLC | Morrill, KS 66515 | Oil Operator | Sep 2025 |
| 1461 | Rock Creek Energy Co | Ada, OK 74820-5725 | Oil Operator | Jul 2022 |
| 1462 | Rock Creek Oil Co. | Iowa Park, TX 76367 | Oil Operator | Mar 2008 |
| 1463 | Rock Creek Oil, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Nov 2019 |
| 1464 | Rock Creek Resources LLC | Englewood, CO 80112 | Oil & Gas Operator | Dec 2021 |
| 1465 | Rock Energy Operating Company | | Oil & Gas Operator | Nov 2008 |
| 1466 | Rock Energy Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 1467 | Rock Energy, Inc. | | Oil & Gas Operator | Sep 1992 |
| 1468 | Rock Fish Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Feb 2026 |
| 1469 | Rock Hill Operating | Burkburnett, TX 76354 | Oil & Gas Operator | Feb 2026 |
| 1470 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | Nov 2025 |
| 1471 | Rock Oil Corporation | Lawrence, KS 66046 | Oil Operator | Oct 2004 |
| 1472 | Rock Oil Resources LLC | Titusville, PA 16354 | Oil Operator | Dec 2025 |
| 1473 | Rock Oil, Inc. | | Oil Operator | Nov 1989 |
| 1474 | Rock Operating | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 1475 | Rock Petroleum, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 1476 | Rock Resources, Inc. | Corpus Chrsti, TX 78414 | Oil & Gas Operator | Feb 2026 |
| 1477 | Rock River Operating Inc | Laramie, WY 82070 | Oil & Gas Operator | Nov 2025 |
| 1478 | Rock Solid Operating, LLC | Southlake, TX 76092 | Oil Operator | Sep 2021 |
| 1479 | Rock Well Petroleum (U.S.), Inc. | Canada, 00100 | Oil & Gas Operator | Sep 2014 |
| 1480 | Rockbridge Oil & Gas | Houston, TX 77027 | Oil & Gas Operator | Mar 1990 |
| 1481 | Rockbridge Oil And Gas, Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1997 |
| 1482 | Rockcliff Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1483 | Rockcliff Operating La LLC | | Oil & Gas Operator | Jul 2022 |
| 1484 | Rockcliff Operating New Mexico LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2018 |
| 1485 | Rockdale Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2020 |
| 1486 | Rockdale Marcellus LLC | Canonsburg, PA 15317 | Gas Operator | Apr 2022 |
| 1487 | Rockdale Resources Corporation | Houston, TX 77024 | Oil Operator | Jul 2016 |
| 1488 | Rockefeller Hughes (USA) LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2015 |
| 1489 | Rocker A Operating Company | Post, TX 79356 | Oil & Gas Operator | Aug 2022 |
| 1490 | Rocker B Production, L.L.C. | Graham, TX 76450 | Gas Operator | Aug 2025 |
| 1491 | Rocket Energy Corporation | Muskogee, OK 74402-1665 | Oil & Gas Operator | Dec 2003 |
| 1492 | Rocket Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Apr 2015 |
| 1493 | Rockford CBM LLC | Tulsa, OK 74103-4335 | Oil & Gas Operator | Jan 2013 |
| 1494 | Rockford Energy Partners II, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2007 |
| 1495 | Rockford Energy Partners III,LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2012 |
| 1496 | Rockford Panhandle, LLC | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2008 |
| 1497 | Rockhound Petroleum, LLC | St. John, KS 67576 | Oil & Gas Operator | Sep 2025 |
| 1498 | Rockies Resources Holdings LLC | Lakewood, CO 80228 | Oil & Gas Operator | Nov 2025 |
| 1499 | Rockies Standard Oil Company | Provo, UT 84604 | Oil & Gas Operator | Oct 2020 |
| 1500 | Rockin 'A' Oil | | Oil Operator | Jul 2025 |