| 1 | A N R Pipeline Co | | Oil & Gas Operator | Jan 2025 |
| 2 | Ace Drilling Services, Inc. | | Oil & Gas Operator | Sep 1987 |
| 3 | American Petrofina Co Of Texas | | Oil & Gas Operator | Jun 1985 |
| 4 | Antares Ventures, L.L.C. | | Oil Operator | Oct 2016 |
| 5 | Arkla Petroleum LLC | | Oil & Gas Operator | May 2006 |
| 6 | Axiom Tep, LLC | | Oil & Gas Operator | May 2015 |
| 7 | B & B Oil & Gas Co., Inc. | | Gas Operator | Feb 1991 |
| 8 | Bagby Operating Co., Inc. | | Gas Operator | Aug 2001 |
| 9 | Belden & Blake Corporation | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 10 | Bethlan Production Corporation | | Oil & Gas Operator | Dec 1994 |
| 11 | Big Creek Operating, Inc. | | Oil & Gas Operator | Jan 1991 |
| 12 | Billy E. Bayles | | Oil & Gas Operator | Apr 1998 |
| 13 | Black Gold Prod Co., Inc. | | Oil & Gas Operator | Feb 1998 |
| 14 | Bonita Hydrocarbons Company | Dallas, TX 75229 | Oil & Gas Operator | Jun 2008 |
| 15 | Burns Oil & Gas Expl. | | Oil & Gas Operator | Jan 1985 |
| 16 | C & F Oil Company, Inc. | | Oil Operator | Jan 2025 |
| 17 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 18 | Capital Gas, Inc. | | Gas Operator | Jan 1998 |
| 19 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 20 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 21 | CHC Energy, LLC | | Gas Operator | Nov 2012 |
| 22 | Cisco Petroleum, Inc. | | Oil & Gas Operator | Oct 2010 |
| 23 | Conquest Petroleum Inc | | Oil & Gas Operator | Nov 2014 |
| 24 | CSC, Inc. | | Oil Operator | Jan 2000 |
| 25 | Custer K. Primos | | Oil & Gas Operator | Oct 2002 |
| 26 | Debbie Carroll | | Oil & Gas Operator | Apr 1999 |
| 27 | Delta Expl.& Development Corp. | | Oil & Gas Operator | Jan 2025 |
| 28 | Delta Petroleum Inc | Houston, TX 77269-1007 | Oil & Gas Operator | May 2009 |
| 29 | Delta Production Services, LLC | | Oil & Gas Operator | Aug 2002 |
| 30 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2026 |
| 31 | Dewey White Etal | | Oil & Gas Operator | Dec 1987 |
| 32 | Diamond Shamrock Corp | Amarillo, TX 79105 | Oil & Gas Operator | Jan 1987 |
| 33 | Dorbert Oil & Gas, Inc. | | Gas Operator | Aug 1988 |
| 34 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 35 | Energy Program Accompany | | Oil Operator | Dec 2006 |
| 36 | Energy Prospector'S Inc | | Oil & Gas Operator | Jun 1997 |
| 37 | EP&W | | Oil Operator | Dec 1997 |
| 38 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 39 | Fritz Operating Co. | | Oil & Gas Operator | Jun 1990 |
| 40 | G & G Oil & Gas, Inc. | | Gas Operator | Nov 1992 |
| 41 | G. L. Slade, Inc. | | Oil & Gas Operator | Feb 1985 |
| 42 | Gas Masters Of America | | Oil & Gas Operator | Oct 1993 |
| 43 | Gas Masters Of America, Inc. | | Oil & Gas Operator | Nov 2024 |
| 44 | GMJ Of La, Inc. | | Oil & Gas Operator | May 1998 |
| 45 | Golden Resources Corporation | Dallas, TX 75238 | Oil & Gas Operator | Dec 1998 |
| 46 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 47 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 48 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 49 | H & B Well Service, Inc. | | Oil & Gas Operator | Aug 1993 |
| 50 | H & S Operating Company Inc | Winesburg, OH 44690 | Oil & Gas Operator | Dec 2024 |
| 51 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 52 | Hogan Exploration, Inc. | | Oil & Gas Operator | Mar 2000 |
| 53 | J P Van Way | | Oil & Gas Operator | Dec 2024 |
| 54 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Feb 2026 |
| 55 | Joseph F. Fritz Operating Co. | | Oil & Gas Operator | Mar 1983 |
| 56 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Nov 2025 |
| 57 | Justiss-Mears Oil Co. | | Oil & Gas Operator | Feb 1981 |
| 58 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 59 | Louisiana Energy Corp. | | Gas Operator | Dec 1987 |
| 60 | Louisiana Leasing & Expl, Inc. | | Oil & Gas Operator | Apr 2011 |
| 61 | Lusk & Lusk, Inc. | | Oil & Gas Operator | Jul 1984 |
| 62 | Malmac Energy Corp. | | Oil & Gas Operator | Jul 1987 |
| 63 | Marjo, Inc. | | Oil & Gas Operator | Sep 1991 |
| 64 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Dec 2025 |
| 65 | McDonald Marketing & Operg. Co | | Gas Operator | May 1991 |
| 66 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 67 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Feb 2026 |
| 68 | Michigan-Wisconsin Pipe Line Co | | Oil & Gas Operator | Dec 1983 |
| 69 | Mike Revere | | Oil & Gas Operator | Jul 1991 |
| 70 | Milton Oil & Gas Management | | Oil & Gas Operator | Jul 1988 |
| 71 | ML Resources, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 72 | Moro Bay Oil Company, Inc. | | Oil Operator | Jan 1997 |
| 73 | Murphy - Sun | | Oil & Gas Operator | May 1989 |
| 74 | Neilco | | Oil & Gas Operator | Nov 2024 |
| 75 | Newhaven Operating Inc | | Oil & Gas Operator | Dec 1998 |
| 76 | Oasis Production Co., Inc. | | Oil & Gas Operator | Jun 1988 |
| 77 | Oilwell Acquisition Co | | Oil & Gas Operator | Jun 1999 |
| 78 | Onshore Pipeline Const Co Inc | | Oil & Gas Operator | Aug 1998 |
| 79 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 80 | Par Exploration Co | | Oil & Gas Operator | Oct 1986 |
| 81 | Pete Caldwell Drilling Co.,Inc | | Oil & Gas Operator | Aug 1991 |
| 82 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 83 | Phillberg Oil Company | | Oil Operator | Mar 2014 |
| 84 | Phoenix Drilling & Exploration | | Oil & Gas Operator | Jun 1982 |
| 85 | Phoenix-Vi-Roi | | Oil & Gas Operator | Mar 1986 |
| 86 | Primos Production | | Oil & Gas Operator | Dec 2024 |
| 87 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Feb 2026 |
| 88 | R D V, Inc. | | Oil Operator | May 2004 |
| 89 | Rabun Resources | | Gas Operator | Jan 2025 |
| 90 | Rebel Land And Exploration Inc | | Oil & Gas Operator | Aug 1989 |
| 91 | RLS Partnership | | Oil Operator | Apr 1983 |
| 92 | Rowe, Inc. | | Oil & Gas Operator | Jun 1992 |
| 93 | S S M Partnership | | Oil & Gas Operator | Jul 1992 |
| 94 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 95 | Southern Production Co Inc | Madill, OK 73446 | Oil & Gas Operator | Nov 2025 |
| 96 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 97 | Stallion Oil Corporation | | Oil & Gas Operator | Nov 1987 |
| 98 | Strahan Oil & Gas Co., Inc. | | Gas Operator | Oct 1983 |
| 99 | Sun Exploration And Production Co | | Oil & Gas Operator | Jan 1990 |
| 100 | SW Associates | | Oil & Gas Operator | Dec 1985 |