| 1601 | Attaway Energy Group, Inc. | | Oil & Gas Operator | Aug 1995 |
| 1602 | Atteberry Engineering | Edmond, OK 73013-6624 | Oil & Gas Operator | Mar 2008 |
| 1603 | Attica Central School District | Attica, NY 14011 | Gas Operator | Dec 2025 |
| 1604 | Attica Gas Ventu | | Oil & Gas Operator | Dec 1995 |
| 1605 | Atwa Energy Co. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1996 |
| 1606 | Atwell Technical Services, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2026 |
| 1607 | Atwell, David L. | Duncan, OK 73533 | Oil & Gas Operator | Jul 2003 |
| 1608 | Atwood Energy Inc | Port Washington, OH 43837-9214 | Oil & Gas Operator | Dec 1993 |
| 1609 | Atwood Resources Inc | Houston, TX 72151 | Oil & Gas Operator | Dec 1993 |
| 1610 | Auburn Enlarged Central School District | Auburn, NY 13021 | Gas Operator | Dec 2025 |
| 1611 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 1612 | Auden Oil Inc. | Hardin, TX 77561 | Oil Operator | Jul 2026 |
| 1613 | Audrey Oil & Gas LLC | Pampa, TX 79066 | Oil & Gas Operator | Jul 2026 |
| 1614 | Augerhead Oil LLC | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2025 |
| 1615 | August Oil | Plano, TX 75093 | Oil & Gas Operator | Aug 2003 |
| 1616 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 1617 | Augusta Oil & Gas Inc | Abilene, TX 79604 | Oil & Gas Operator | Dec 2015 |
| 1618 | Augustus Energy Partners LLC | Billings, MT 59102 | Oil & Gas Operator | Oct 2013 |
| 1619 | Augustus Oil And Gas Corporation | Austin, TX 78731 | Oil & Gas Operator | Jul 2026 |
| 1620 | Aunix Operating, LLC | Tomball, TX 77377 | Oil Operator | Jul 2026 |
| 1621 | Auro USA, Inc. | | Oil Operator | Dec 2024 |
| 1622 | Aurora Energy LTD | Traverse City, MI 49684 | Oil & Gas Operator | Dec 2006 |
| 1623 | Aurora Exploration & Prod Co | Whitesboro, TX 76273 | Oil Operator | Jul 2026 |
| 1624 | Aurora Gas LLC. | | Oil & Gas Operator | Dec 2017 |
| 1625 | Aurora Gas, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jan 2000 |
| 1626 | Aurora Operating, LLC | Houston, TX 77010 | Oil Operator | Jul 2026 |
| 1627 | Aurora Power Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Aug 2018 |
| 1628 | Aurora Resources Corporation | Corpus Christ, TX 78401 | Oil & Gas Operator | Jul 2026 |
| 1629 | Aurora USA Development, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 1630 | Aus-Tex Exploration, Inc | | Oil & Gas Operator | May 2026 |
| 1631 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 1632 | Ausland Production Company | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 1633 | Ausmus & Clark Oil | | Oil Operator | Jul 2022 |
| 1634 | Auster Oil And Gas, Inc. | | Oil & Gas Operator | Mar 1989 |
| 1635 | Auster Oil And Gas, Inc. Et Al | | Oil & Gas Operator | May 2001 |
| 1636 | Austex Energy, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Apr 1993 |
| 1637 | Austin E. Stewart | | Oil & Gas Operator | Feb 1979 |
| 1638 | Austin Energy LLC | | Oil Operator | Mar 2026 |
| 1639 | Austin Energy Operations, Inc. | Corpus Christ, TX 78410 | Oil & Gas Operator | Jul 2026 |
| 1640 | Austin Minerals Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Jul 2026 |
| 1641 | Austin Oil Company | | Oil & Gas Operator | Dec 2000 |
| 1642 | Austin Operating, LLC. | Chicago, IL 60622 | Oil Operator | Jul 2026 |
| 1643 | Austin Production Company, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Mar 2015 |
| 1644 | Austin Resources Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2008 |
| 1645 | Austin Ridge Energy Corporation | Houston, TX 77224 | Oil & Gas Operator | Jul 2026 |
| 1646 | Austin Robert L | Stafford, KS 67578 | Oil & Gas Operator | Dec 1999 |
| 1647 | Austin, Chas W | | Oil Operator | Jan 2009 |
| 1648 | Austin, Dewey | Burkburnett, TX 76354 | Oil & Gas Operator | Nov 1996 |
| 1649 | Austin, John F. | Baton Rouge, LA 70879 | Oil Operator | May 1992 |
| 1650 | Austin, Robert E. | Miami, OK 74354 | Oil Operator | Dec 1995 |
| 1651 | Austral Oil & Exploration, Inc | | Oil & Gas Operator | Jun 2004 |
| 1652 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 1653 | Australis TMS Inc. | | Oil & Gas Operator | Dec 2024 |
| 1654 | Auterra Operating, LLC | Friendswood, TX 77549 | Oil & Gas Operator | Jul 2026 |
| 1655 | Autry C Stephens | Midland, TX 79701 | Oil & Gas Operator | Dec 2001 |
| 1656 | Autry Producing Co. | Cisco, TX 76437 | Oil & Gas Operator | Aug 2008 |
| 1657 | Autry Producing Inc. | Cisco, TX 76437 | Oil Operator | Jul 2026 |
| 1658 | Autry, Martin | Seguin, TX 78155 | Oil Operator | Jul 2026 |
| 1659 | Autumn Energy LLC | Andrews, TX 79714 | Oil Operator | Aug 2017 |
| 1660 | Autumn Energy Operating | Midland, TX 79710 | Oil & Gas Operator | Jul 2026 |
| 1661 | Autumn Exploration LTD | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2015 |
| 1662 | Autumn Ridge Energy LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2025 |
| 1663 | Autumn Ridge Enterprises LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2017 |
| 1664 | Av-Tech Resources Corporation | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2022 |
| 1665 | Av3 Resources, LLC | Midland, TX 79706 | Oil Operator | Jul 2026 |
| 1666 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 1667 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2026 |
| 1668 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 1669 | Avalon Operating LLC | Tulsa, OK 74119-5401 | Oil & Gas Operator | Apr 2026 |
| 1670 | Avalon TX Operating, LLC | Andrews, TX 79714 | Oil & Gas Operator | Jan 2023 |
| 1671 | Avant Jack E | Skiatook, OK 74070 | Oil Operator | Jan 2013 |
| 1672 | Avant Operating II, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2026 |
| 1673 | Avant Operating, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 1674 | Avanti Exploration La, LLC | | Oil & Gas Operator | Nov 2024 |
| 1675 | Avatar Energy LLC | Dallas, TX 75220-2230 | Oil & Gas Operator | Jul 2016 |
| 1676 | Aven Gas & Oil Inc | Oklahoma City, OK 73113-0491 | Oil & Gas Operator | Nov 2021 |
| 1677 | Averill, W. M. Inc. | Victoria, TX 77902 | Oil & Gas Operator | Jun 2003 |
| 1678 | Avers Harvey G Energy Expl | | Oil & Gas Operator | May 2013 |
| 1679 | Avery Oil & Gas, L.P. | Buena VIsta, CO 81211 | Gas Operator | Dec 2006 |
| 1680 | Avery, Irving W. | Buena VIsta, CO 81211 | Oil & Gas Operator | Mar 2008 |
| 1681 | Avian Tech International, Inc. | Euless, TX 76040 | Oil & Gas Operator | Apr 1995 |
| 1682 | Aviara Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2002 |
| 1683 | Aviator Energy, LLC | Plano, TX 75093 | Oil Operator | Jul 2026 |
| 1684 | Avid Energy Assets LLC | Midland, TX 79708 | Oil & Gas Operator | Jul 2026 |
| 1685 | Avighna Energy Inc | Sugar Land, TX 77487 | Oil & Gas Operator | Jan 2019 |
| 1686 | Avips Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jun 1996 |
| 1687 | Aviva America, Inc. | | Oil & Gas Operator | Nov 2013 |
| 1688 | Avoca Farms LTD | Avoca, NY 14809 | Gas Operator | Dec 2025 |
| 1689 | Avon Energy Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 1996 |
| 1690 | Avondale Operating Co | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2019 |
| 1691 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Jul 2026 |
| 1692 | Aw Hembree Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Apr 2026 |
| 1693 | Aw Tipka Oil & Gas Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2025 |
| 1694 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | Jul 2026 |
| 1695 | Ax Operating, L.L.C. | | Oil & Gas Operator | Jul 2018 |
| 1696 | Axem Resources I | | Oil Operator | Aug 1995 |
| 1697 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
| 1698 | Axeon Energy Operations LLC | Evergreen, CO 80439-7624 | Oil Operator | Jul 2015 |
| 1699 | Axia Energy II LLC | HGHLNDS Ranch, CO 80129 | Oil & Gas Operator | Jan 2020 |
| 1700 | Axia Energy III, LLC | Highlands Ranch, CO 80129 | Oil & Gas Operator | Apr 2026 |