| 1 | A N R Pipeline Co | | Oil & Gas Operator | Jan 2025 |
| 2 | A N R Storage Company | | Oil & Gas Operator | Oct 2016 |
| 3 | Ace Energy LLC | Leawood, KS 66211 | Oil & Gas Operator | Sep 2025 |
| 4 | Adler Energy LC | | Oil Operator | May 2017 |
| 5 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 6 | Alumni Petroleum And Resource Management Corp | | Oil & Gas Operator | Mar 1988 |
| 7 | Amoco Production Co And C M S Oil And Gas | | Oil & Gas Operator | Sep 1996 |
| 8 | Amoco Production Co And Peninsular Oil And Gas Co | | Oil & Gas Operator | Sep 1998 |
| 9 | Annex Oil Corp | | Oil & Gas Operator | Jun 2000 |
| 10 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 11 | Antrim Development Corp | | Oil & Gas Operator | Oct 2018 |
| 12 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 13 | Apollo Exploration And Development Inc | | Oil & Gas Operator | Aug 2025 |
| 14 | Arbor Operating LLC | | Oil & Gas Operator | Mar 2024 |
| 15 | Arbor Petroleum Inc | | Oil Operator | Jan 2003 |
| 16 | Arbor Resources LLC | | Oil & Gas Operator | Dec 2007 |
| 17 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2009 |
| 18 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 19 | Austin Energy LLC | | Oil Operator | Oct 2025 |
| 20 | Axia Energy II LLC | HGHLNDS Ranch, CO 80129 | Oil & Gas Operator | Jan 2020 |
| 21 | Aztec Producing Company Inc | | Oil & Gas Operator | May 2022 |
| 22 | B And C Oil Inc | | Oil & Gas Operator | Mar 2012 |
| 23 | B D Deans LLC | | Oil & Gas Operator | May 2009 |
| 24 | B H R Petroleum Inc | | Oil & Gas Operator | Apr 2006 |
| 25 | Bailer And Deshaw | | Oil Operator | Dec 2020 |
| 26 | Bailer Oil Company LLC | | Oil Operator | Dec 2024 |
| 27 | Baldwin And Baldwin Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Aug 1993 |
| 28 | Bannon Energy Inc | Houston, TX 77068 | Oil & Gas Operator | Jun 1998 |
| 29 | Bateson Donald Jr | | Oil Operator | Dec 2024 |
| 30 | Battle Creek Gas Co | | Gas Operator | Mar 1996 |
| 31 | Bauer Bros | | Oil Operator | Sep 2025 |
| 32 | Baumann Resources Inc | | Oil Operator | Jul 1999 |
| 33 | Beckman Production Services Inc | | Oil Operator | Sep 2025 |
| 34 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 35 | Belden And Blake Corp Dba Ward Lake Energy | | Oil & Gas Operator | Jul 2020 |
| 36 | Bell And Gault Drilling Inc | | Oil & Gas Operator | Apr 2001 |
| 37 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 38 | Benchley Donald C | | Oil Operator | Jul 2012 |
| 39 | Benchley Donald P And Benchley Jeffrey P | | Oil Operator | Dec 2020 |
| 40 | Benelli Oil LLC | | Oil Operator | Dec 2024 |
| 41 | Bergman Arthur And VIvian | | Oil & Gas Operator | Dec 2008 |
| 42 | Binney Duane Dba Bens Petroleum Co | | Oil Operator | Apr 2012 |
| 43 | Black River Oil Corp And Golden Petroleum Corp | | Oil & Gas Operator | Dec 1989 |
| 44 | Black Star Energy Inc | | Oil Operator | May 2004 |
| 45 | Bloomingdale Oil LLC | | Oil Operator | Dec 2024 |
| 46 | Blue Bay Oil & Gas, L L C | | Gas Operator | Jan 2018 |
| 47 | Blue Lake Gas Storage Co | | Oil & Gas Operator | Oct 2016 |
| 48 | Bluewater Gas Storage LLC | | Oil Operator | Oct 2025 |
| 49 | Bob Adams And Associates Inc | | Oil & Gas Operator | Dec 1998 |
| 50 | Bott John A | | Gas Operator | Dec 2012 |
| 51 | Bourdeaux H J | | Oil Operator | Dec 2022 |
| 52 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 53 | Brandli Oil Inc | | Oil Operator | Sep 2025 |
| 54 | Breitburn Operating Limited Partnership | | Oil & Gas Operator | Aug 2022 |
| 55 | Brewer Robert A And Karen A | | Oil Operator | Oct 2025 |
| 56 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 57 | Bruce Alan Enterprises Inc | | Oil Operator | Sep 2025 |
| 58 | Bucky LTD | | Oil Operator | Dec 2020 |
| 59 | Burgess D M Jr And Hall H E And Stinson D E | | Oil Operator | May 2000 |
| 60 | Burgess Hall Stinson Inc | | Oil Operator | Dec 2009 |
| 61 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 62 | C And D Explorations LLC | | Oil Operator | Sep 2025 |
| 63 | C M F Oil LLC | | Oil Operator | Dec 2024 |
| 64 | C M S Gas Transmission Co | | Oil & Gas Operator | Dec 2020 |
| 65 | C M S Oil And Gas Co And Miller Brothers | | Oil & Gas Operator | Apr 1992 |
| 66 | Cain Glen | | Oil Operator | Dec 2016 |
| 67 | Canonie Tony SR | | Gas Operator | Mar 1996 |
| 68 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2025 |
| 69 | Center Dean Dba Center Operating Co | | Oil & Gas Operator | Jul 2003 |
| 70 | Center Junction Corp | | Oil Operator | Mar 2009 |
| 71 | Century Oil Company Inc | | Oil Operator | Dec 2024 |
| 72 | Chandler Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2009 |
| 73 | Cherokee Resources Inc | | Oil & Gas Operator | Mar 1996 |
| 74 | Christian Oil Co | | Oil & Gas Operator | Sep 2025 |
| 75 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 76 | Clarkston Oil Co | | Oil Operator | Dec 2024 |
| 77 | Clarkston Oil Corp | | Oil Operator | Dec 2024 |
| 78 | Claybanks Oil Co LLC | | Oil Operator | Jun 2019 |
| 79 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 80 | CNG Development Co | | Oil & Gas Operator | Dec 2008 |
| 81 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 82 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 83 | Collin C W Jr | | Oil Operator | Oct 2015 |
| 84 | Collin Oil Operations LLC | | Oil Operator | Aug 2025 |
| 85 | Collins C R And Collins F Dba Collins Brothers Oil | | Oil & Gas Operator | Jul 2008 |
| 86 | Columbus III Production LC | | Oil Operator | Oct 2003 |
| 87 | Columbus Oil And Gas LLC | | Oil Operator | Oct 2020 |
| 88 | Comerica Properties Corp | | Oil Operator | May 1985 |
| 89 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 90 | Consumers Energy Co | | Oil & Gas Operator | Apr 2010 |
| 91 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2025 |
| 92 | Core Antrim Company LLC | | Gas Operator | Oct 2025 |
| 93 | Core Energy LLC | | Oil & Gas Operator | Sep 2025 |
| 94 | Country Boy Oil Co Inc | | Oil Operator | Nov 2017 |
| 95 | Countrymark Energy Resources L L C | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2023 |
| 96 | Cowen Michael T | | Oil & Gas Operator | Dec 2009 |
| 97 | Cozart Producers | | Oil Operator | Dec 2024 |
| 98 | Crawford Arthur E Dba The Lazy Oil Co | | Oil Operator | Dec 2024 |
| 99 | Creco Operating LLC | | Oil & Gas Operator | Nov 2015 |
| 100 | Cronus Exploration Co LLC | | Oil & Gas Operator | Oct 2025 |