| 1601 | Ronan Company | Springfield, MO 65704 | Oil & Gas Operator | Aug 2013 |
| 1602 | Ronco Energy Resources Inc | Norman, OK 73072 | Oil & Gas Operator | Apr 2015 |
| 1603 | Ronco Incorporat | | Oil Operator | Sep 1988 |
| 1604 | Ronde Operating, LLC | Houston, TX 77006 | Oil & Gas Operator | Mar 2021 |
| 1605 | Rongey Ira E | Sapulpa, OK 74066-9317 | Oil & Gas Operator | May 2013 |
| 1606 | Rongey Oil | Jenks, OK 74037-3621 | Oil & Gas Operator | Jan 2013 |
| 1607 | Ronmar Engineering & Expl Inc | Ada, OK 74820-1402 | Oil Operator | Aug 2013 |
| 1608 | Ronning Gas And Oil LLC | Mesa, AZ 85203 | Oil & Gas Operator | Jun 2025 |
| 1609 | Ronny N. Davis | | Oil Operator | Jan 2025 |
| 1610 | Roof Carl | Indiana, PA 15701 | Gas Operator | Dec 2024 |
| 1611 | Rookstool, William A. | Edmond, OK 73034 | Gas Operator | Jan 1999 |
| 1612 | Roome Exploration Company | Bartlett, TX 76511 | Oil & Gas Operator | Mar 2008 |
| 1613 | Roome Oil Co. | Bartlett, TX 76511 | Oil & Gas Operator | Jun 2025 |
| 1614 | Roon Energy, Inc. | Dickinson, TX 77539 | Oil Operator | Jun 2025 |
| 1615 | Roosevelt Operating Co. | | Oil Operator | Sep 2023 |
| 1616 | Roosevelt Resources LP | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 1617 | Rooster Petroleum, LLC | | Oil & Gas Operator | Feb 2011 |
| 1618 | Rooster Production, LLC | Oil City, LA 71061 | Oil Operator | Jan 2025 |
| 1619 | Roosth & Genecov Production Co. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2003 |
| 1620 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2025 |
| 1621 | Ropa Exploration Corp. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2011 |
| 1622 | Ropar Operating Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2025 |
| 1623 | Roppolo Petro/Sun Explor& Prod | | Oil & Gas Operator | Sep 1988 |
| 1624 | Roppolo Petroleum Co. | | Oil & Gas Operator | Jan 2000 |
| 1625 | Rorico Oil Company | Argyle, TX 76226 | Oil & Gas Operator | Jun 2025 |
| 1626 | Roring Jr Roy W | Duncan, OK 73533-3048 | Oil & Gas Operator | Aug 2022 |
| 1627 | Roring Roy W | Ardmore, OK 73401 | Oil & Gas Operator | Dec 1998 |
| 1628 | Roring Steven A | Ratliff City, OK 73481-0206 | Oil Operator | Feb 2018 |
| 1629 | Rosa Petroleum | Evansville, WY 82636 | Oil Operator | Dec 1995 |
| 1630 | Rosamond Drilling Co., Inc. | | Gas Operator | Nov 1984 |
| 1631 | Rosbottom Petroleum | | Oil & Gas Operator | Aug 1988 |
| 1632 | Rosbottom Production Corp | Shreveport, LA 71134 | Oil & Gas Operator | Dec 2017 |
| 1633 | Roscoe Gas & Oil Co | Dover, OH 44622 | Oil & Gas Operator | Dec 1991 |
| 1634 | Rose City Resources, LLC | Tyler, TX 75703 | Oil & Gas Operator | Jun 2025 |
| 1635 | Rose Dan And Bill | Henryetta, OK 74437-1450 | Oil & Gas Operator | Feb 2025 |
| 1636 | Rose Exploration, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Feb 2002 |
| 1637 | Rose Katherine Stone | | Oil & Gas Operator | Dec 2025 |
| 1638 | Rose Operating Company | Tulsa, OK 74101-2391 | Oil & Gas Operator | Dec 2014 |
| 1639 | Rose Pass Mines, Inc. | | Oil Operator | Oct 1982 |
| 1640 | Rose Petroleum (Us), LLC | Parker, CO 80134 | Oil & Gas Operator | Jul 2016 |
| 1641 | Rose Petroleum (Utah) LLC | Annapolis, MD 21401 | Oil & Gas Operator | Mar 2025 |
| 1642 | Rose Petroleum Corp | Oklahoma City, OK 73146 | Oil & Gas Operator | Feb 2015 |
| 1643 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | Feb 2025 |
| 1644 | Rose, Lonnie | Troy, WV 26443 | Gas Operator | Dec 2021 |
| 1645 | Rose, Verl | Spring Creek, NV 89815 | Oil & Gas Operator | Feb 2011 |
| 1646 | Roseclare Oil Co | | Oil Operator | Dec 2016 |
| 1647 | Rosehill Operating Company, LLC | Houston, TX 77084 | Oil & Gas Operator | Sep 2021 |
| 1648 | Rosekrans Janet A Dba J Oil Co | | Oil & Gas Operator | Jan 2003 |
| 1649 | Rosel Energy, Inc. | Liberal, KS 67901 | Oil & Gas Operator | Jul 2004 |
| 1650 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 1651 | Rosemain 031 LLC | | Oil & Gas Operator | Mar 2025 |
| 1652 | Rosenthal Henry & Co | | Oil Operator | Feb 1994 |
| 1653 | Rosenthal, Stanley H. | Bay City, TX 77404 | Oil & Gas Operator | Dec 2020 |
| 1654 | Rosestone Operating Company, LLC | | Oil & Gas Operator | Dec 2024 |
| 1655 | Rosetta Energy Partners, L P | Dallas, TX 75219 | Oil & Gas Operator | Jul 2009 |
| 1656 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Jun 2025 |
| 1657 | Rosewood Resources (HPC), Inc. | | Gas Operator | Dec 1984 |
| 1658 | Rosewood Resources (Poc), Inc. | | Oil & Gas Operator | Dec 1984 |
| 1659 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |
| 1660 | Roskydal, Laverne | La Vernia, TX 78121 | Oil Operator | Jun 2025 |
| 1661 | Rosner, S. | San Antonio, TX 78216 | Oil & Gas Operator | Aug 1996 |
| 1662 | Ross & Glenn Petroleum Inc. | | Oil & Gas Operator | Aug 1984 |
| 1663 | Ross & Wharton Gas Co Inc | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 1664 | Ross Bobby L | Okmulgee, OK 74447-8802 | Oil & Gas Operator | Apr 2020 |
| 1665 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 1666 | Ross Engineering, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2025 |
| 1667 | Ross Exploration,Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2013 |
| 1668 | Ross Explorations, Inc | Fort Smith, AR 72903 | Gas Operator | Jan 2025 |
| 1669 | Ross Gas And Oil, LTD. Co. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Jun 2025 |
| 1670 | Ross Operating Company | Shreveport, LA 71163 | Oil & Gas Operator | May 1996 |
| 1671 | Ross Prod. - Zwahlen & Raish | | Oil & Gas Operator | Sep 1998 |
| 1672 | Ross Production Co. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 1673 | Ross, Dwight M. DRLG. Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2025 |
| 1674 | Ross, Mike Inc. | Coalton, WV 26257 | Oil & Gas Operator | Dec 2021 |
| 1675 | Ross-A. J. Hodges Ind. | | Oil & Gas Operator | Dec 1980 |
| 1676 | Ross-Rippy | Tyler, TX 75702 | Oil & Gas Operator | Oct 2002 |
| 1677 | Rossi, Paul | FT Meade, FL 33841 | Oil Operator | Dec 2023 |
| 1678 | Rosson Et Al | | Oil Operator | Aug 1983 |
| 1679 | Rosson Exploration Company | | Oil & Gas Operator | Apr 2005 |
| 1680 | Rosson, Robert K. | Novice, TX 79538 | Oil & Gas Operator | Aug 2003 |
| 1681 | Roswell Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2019 |
| 1682 | Rotation, Incorporated | Houston, TX 77057 | Oil & Gas Operator | Mar 2023 |
| 1683 | Roth Gary E | Tonkawa, OK 74653-2033 | Oil & Gas Operator | Jan 2020 |
| 1684 | Rothschild Oil Co. | | Oil Operator | Dec 1982 |
| 1685 | Rougeot Oil & Gas Corp | Sperry, OK 74073 | Oil & Gas Operator | Feb 2025 |
| 1686 | Rough Creek Energy LLC | Mandeville, LA 70471 | Oil Operator | Dec 2023 |
| 1687 | Rough Creek Exploration, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Jan 1996 |
| 1688 | Rough Hollow Ranch Corporation | Dallas, TX 75209 | Oil Operator | Aug 2006 |
| 1689 | Roughhouse Oil & Gas LLC | | Oil & Gas Operator | Mar 2025 |
| 1690 | Roughhouse Operating, LLC | Addison, TX 75001 | Oil & Gas Operator | Mar 2025 |
| 1691 | Roughneck L.L.C. | | Oil Operator | Jan 2025 |
| 1692 | Roule Production Company | Bay City, TX 77414 | Oil & Gas Operator | Feb 1997 |
| 1693 | Roulette Energy LLC | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2023 |
| 1694 | Roulette Oil & Gas LLC | Shinglehouse, PA 16748-3406 | Oil & Gas Operator | Mar 2025 |
| 1695 | Roulston Pat | Konawa, OK 74849-4020 | Oil Operator | Mar 2025 |
| 1696 | Round Rock Resources, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2012 |
| 1697 | Roundtree & Associates, Inc. | | Oil & Gas Operator | Jun 2024 |
| 1698 | Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Mar 2025 |
| 1699 | Rountree Productions LLC | | Oil Operator | Jan 2025 |
| 1700 | Rountree/Wright Enterprises LLC | | Oil Operator | Apr 2025 |