| 1 | Acadian Gas Pipeline System | | Oil Operator | Jan 2025 |
| 2 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 3 | Auro USA, Inc. | | Oil Operator | Dec 2024 |
| 4 | Bayou Choctaw, Inc. | | Oil & Gas Operator | Jun 2004 |
| 5 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 6 | Blue Mill Farms, Inc. | | Oil & Gas Operator | Apr 1992 |
| 7 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 8 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 9 | Brock Exploration Corporation | New Orleans, LA 70112-1707 | Oil & Gas Operator | Jan 1999 |
| 10 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 11 | Burlington Res Oil & Gas Co | | Oil & Gas Operator | Dec 2000 |
| 12 | Celeron Oil & Gas Company | | Oil & Gas Operator | Dec 1987 |
| 13 | Chevron Pipe Line Company | Houston, TX 77001 | Oil Operator | Feb 2015 |
| 14 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 15 | CLK Energy Partners, LLC | | Oil & Gas Operator | Aug 2018 |
| 16 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 17 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 18 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 19 | Davis-Goodman Oil Company | | Oil & Gas Operator | Jun 1980 |
| 20 | Denovo Oil & Gas, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 1995 |
| 21 | Desco Oil Company | Houston, TX 77056 | Oil & Gas Operator | Feb 2017 |
| 22 | Dew Oil And Gas Co.,Inc. | | Oil & Gas Operator | Dec 1989 |
| 23 | Dome De Sel LLC | | Oil & Gas Operator | Nov 2024 |
| 24 | Energy Management Company Of Texas | | Oil & Gas Operator | Dec 2024 |
| 25 | Energy Production Corporation | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 26 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 27 | Gde Tiger Petroleum, LLC | | Oil & Gas Operator | Dec 2024 |
| 28 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 29 | Graham Expl LTD-DRLG PRNRSHP | | Oil & Gas Operator | Aug 1984 |
| 30 | Harcor Exploration Inc. | | Oil Operator | Aug 1989 |
| 31 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 32 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |
| 33 | Iberia Operating Corporation | | Oil & Gas Operator | Jan 2003 |
| 34 | Jeems Bayou Production Corp. | Oil City, LA 71061 | Oil & Gas Operator | Oct 2025 |
| 35 | Key Operating Co., Inc. | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2025 |
| 36 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 37 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 38 | Liberty Resources, Inc. | | Oil & Gas Operator | Dec 2024 |
| 39 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 40 | Magic Circle Energy | Oklahoma City, OK 73185 | Oil & Gas Operator | Dec 1983 |
| 41 | Memaca Petroleum Corporation | | Oil & Gas Operator | Jan 1990 |
| 42 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 43 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 44 | Monterey Pipeline Co. | | Oil Operator | Aug 1993 |
| 45 | Murexco Petroleum, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 1996 |
| 46 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | Oct 2025 |
| 47 | Northwind Oil & Gas, LLC | | Oil & Gas Operator | Nov 2019 |
| 48 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
| 49 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Oct 2025 |
| 50 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 51 | Pan-Ok Production Company | | Oil & Gas Operator | Nov 2024 |
| 52 | Panaco Production Co | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 53 | Panaco, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 54 | Park Exploration Inc | | Oil & Gas Operator | Nov 2012 |
| 55 | Pend Oreille Oil & Gas Company | | Oil & Gas Operator | Sep 1989 |
| 56 | Pennington Oil & Gas Int, LLC | | Oil & Gas Operator | Dec 2024 |
| 57 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 58 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 59 | Range Louisiana Operating, LLC | | Oil & Gas Operator | Aug 2020 |
| 60 | Reese Oil & Gas LTD | | Oil & Gas Operator | Sep 1991 |
| 61 | Reliable Prod Service Inc. | | Oil Operator | Mar 2007 |
| 62 | Sabine Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Jul 1996 |
| 63 | Single Barrel Oil And Gas LLC | Granbury, TX 76048 | Oil & Gas Operator | Oct 2025 |
| 64 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 65 | SMK-La, Inc. | | Oil & Gas Operator | Sep 1999 |
| 66 | Sohio Petroleum Co. | Casper, WY 82602 | Oil & Gas Operator | Apr 1986 |
| 67 | South La. Production Co., Inc. | | Oil & Gas Operator | Jun 1982 |
| 68 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 69 | The Exploration Co. Of La, Inc | | Oil & Gas Operator | Nov 1987 |
| 70 | TMR Exploration, Inc. | Bossier City, LA 71171 | Oil & Gas Operator | Oct 2025 |
| 71 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 72 | Union Texas Petroleum Corp. | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 73 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Oct 2025 |
| 74 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 75 | Vitol Resources Inc. Of Delaware | | Oil & Gas Operator | Jul 2016 |