| 1 | Acadian Gas Pipeline System | | Oil Operator | Jan 2025 |
| 2 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 3 | American Explorer, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Jan 1999 |
| 4 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 5 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 6 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2026 |
| 7 | Ascent Energy, Inc | McKinney, TX 75069 | Oil & Gas Operator | Nov 2008 |
| 8 | Atc Realty Eight, Inc. | | Oil & Gas Operator | Nov 1988 |
| 9 | Bayou Couba Oil Company | | Oil & Gas Operator | May 2002 |
| 10 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 11 | Brock Exploration Corp | New Orleans, LA 70112-1707 | Oil & Gas Operator | Jan 1999 |
| 12 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 13 | Campbell Energy Corporation | | Oil & Gas Operator | May 1992 |
| 14 | Canlan Oil Company | | Oil & Gas Operator | Mar 1992 |
| 15 | Castex Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 16 | Century Exploration N.O. LLC | | Oil & Gas Operator | Jun 2017 |
| 17 | Century Exploration N.O., Inc. | | Oil & Gas Operator | Sep 2011 |
| 18 | Chaparral Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2009 |
| 19 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2026 |
| 20 | Chevron Pipe Line Company | Houston, TX 77001 | Oil Operator | Feb 2015 |
| 21 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 22 | Clovelly Oil Co. LLC | | Oil & Gas Operator | Nov 2024 |
| 23 | Clovelly Oil Co., Inc. | | Oil & Gas Operator | Nov 2008 |
| 24 | Columbia Gulf Transmission Co. | | Oil Operator | Dec 2014 |
| 25 | Columbia Gulf Transmission Company, LLC | | Oil Operator | Jan 2025 |
| 26 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Feb 2026 |
| 27 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 28 | Davis Asset Management, Inc. | Houston, TX 77010 | Oil & Gas Operator | Dec 2004 |
| 29 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 30 | Delta Operating Corporation | | Oil & Gas Operator | Feb 2024 |
| 31 | Denbury Management, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Dec 1999 |
| 32 | Drew Cornell, Inc.-Agent | | Oil & Gas Operator | Sep 1990 |
| 33 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 34 | Dune Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 2016 |
| 35 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | Nov 2024 |
| 36 | El Tres Petr. Corp. | | Oil & Gas Operator | Jan 1984 |
| 37 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 38 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 39 | Energy RSRVS GRP-Lavino-Traver | | Oil & Gas Operator | Aug 1985 |
| 40 | Enron Oil & Gas Company | Houston, TX 77210 | Oil & Gas Operator | Dec 1999 |
| 41 | Enstar Petroleum Company | | Oil & Gas Operator | Aug 1985 |
| 42 | Enstar Petroleum, Inc. | | Oil & Gas Operator | Jan 1984 |
| 43 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 44 | Evangeline Natural Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 45 | Expert Oil & Gas, L.L.C. | | Oil & Gas Operator | Nov 2024 |
| 46 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 47 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Feb 2026 |
| 48 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 49 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 50 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 51 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 52 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 53 | Forman Petroleum Corporation | | Oil & Gas Operator | Aug 2001 |
| 54 | Gas Producing Enterprises, Inc. | | Oil & Gas Operator | Oct 1985 |
| 55 | Gatoil (U.S.A.), Inc. | | Oil & Gas Operator | Jul 1988 |
| 56 | Genesis Petroleum Corporation | Fort Worth, TX 76116-7151 | Oil & Gas Operator | Mar 2011 |
| 57 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 58 | Glacier Park Company | Houston, TX 77252 | Oil & Gas Operator | Aug 2001 |
| 59 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 60 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 61 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 62 | GT Energy | | Oil & Gas Operator | Mar 1993 |
| 63 | Gulf Coast Drill. & Expl. Inc. | | Oil & Gas Operator | Nov 1988 |
| 64 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 65 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 66 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 67 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 68 | Halcon Resources Operating, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2013 |
| 69 | Hicks Production Co. | | Oil & Gas Operator | Apr 1991 |
| 70 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Feb 2026 |
| 71 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 72 | Jack W. Grigsby | | Oil & Gas Operator | Sep 2001 |
| 73 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 74 | Koch Gateway Pipeline Company | | Oil & Gas Operator | Feb 2001 |
| 75 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 76 | Lanoco, Inc. | | Oil & Gas Operator | Sep 2002 |
| 77 | Liberty Oil & Gas Corp | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 78 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Feb 2026 |
| 79 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 80 | Llox, L.L.C. | Covington, LA 70433 | Oil & Gas Operator | Feb 2026 |
| 81 | Louisiana Gas Service Co. | | Oil Operator | May 2004 |
| 82 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 83 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Dec 2025 |
| 84 | Magnum Producing & Operating Co. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jan 2004 |
| 85 | Marine Cont. & Supply Inc. | | Oil & Gas Operator | Nov 1985 |
| 86 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 87 | Martin Exploration Co. | | Oil & Gas Operator | Apr 1986 |
| 88 | McAlester Fuel Co. | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 89 | Mongrue Oil Company, Inc. | | Oil & Gas Operator | Oct 1999 |
| 90 | Mongrue, Roland, Inc | | Oil & Gas Operator | Mar 1979 |
| 91 | Monsanto Company | Indianapolis, IN 46280 | Oil & Gas Operator | Jan 2005 |
| 92 | MVP Production Inc. | | Oil & Gas Operator | Apr 2005 |
| 93 | Nerco Oil & Gas Inc | | Oil & Gas Operator | Dec 1996 |
| 94 | Northcoast Oil Company | | Oil & Gas Operator | Mar 2009 |
| 95 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
| 96 | Petro "E", LLC | | Oil & Gas Operator | Feb 2010 |
| 97 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 98 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2026 |
| 99 | Probe Offshore, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 100 | R & B Oil Company, LLC Of Texas | | Oil & Gas Operator | Jan 2025 |