| 1 | A N R Storage Company | | Oil & Gas Operator | Oct 2016 |
| 2 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 3 | Apollo Exploration And Development Inc | | Oil & Gas Operator | Jun 2025 |
| 4 | Bluewater Gas Storage LLC | | Oil Operator | Aug 2025 |
| 5 | Collins C R And Collins F Dba Collins Brothers Oil | | Oil & Gas Operator | Jul 2008 |
| 6 | Columbus III Production LC | | Oil Operator | Oct 2003 |
| 7 | Columbus Oil And Gas LLC | | Oil Operator | Oct 2020 |
| 8 | Consumers Energy Co | | Oil & Gas Operator | Apr 2010 |
| 9 | D T E Gas Company | | Oil & Gas Operator | Jun 1999 |
| 10 | Deep River Energy LLC | | Oil Operator | May 2025 |
| 11 | Dominion Natural Resources LLC | Dallas, TX 75367 | Oil & Gas Operator | Oct 2025 |
| 12 | Energex Petroleum Inc | | Oil Operator | Sep 2019 |
| 13 | Federated Oil And Gas Properties Inc | | Oil & Gas Operator | Jul 2025 |
| 14 | G And S Exploration LLC | | Oil Operator | Mar 2016 |
| 15 | Gibraltar Energy LLC | | Oil Operator | Aug 2025 |
| 16 | Gout Margaret M Dba Lakeville Gas Associates | | Oil & Gas Operator | Dec 2003 |
| 17 | Gunner Energy Corp. | Troy, MI 48083 | Oil & Gas Operator | Jun 1995 |
| 18 | Jupiter Oil Corp | | Oil & Gas Operator | Aug 2025 |
| 19 | Klingler Automatic Industries Inc | | Oil & Gas Operator | Jul 2025 |
| 20 | Lawrence Exploration Inc | | Oil & Gas Operator | Sep 2004 |
| 21 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 22 | Mills Glen A | | Gas Operator | Dec 1985 |
| 23 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 24 | Northeastern Energy Corp | | Oil & Gas Operator | Dec 2015 |
| 25 | Onco Petroleum USA Inc | | Oil Operator | Dec 2009 |
| 26 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 27 | Pangborn Tom Dba Pangborn Exploration | | Oil & Gas Operator | Jan 1993 |
| 28 | Ranch Production Co | | Oil & Gas Operator | Jul 2000 |
| 29 | Rayburn Oil Co Inc | | Oil & Gas Operator | Dec 2024 |
| 30 | Reef Petroleum Corp | | Oil & Gas Operator | Feb 1994 |
| 31 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 32 | Sappington Crude Oil Inc | | Oil & Gas Operator | Dec 2024 |
| 33 | Sappington Walter B Dianne M | | Oil Operator | Dec 2024 |
| 34 | Schmude And Pangborn Associates | | Oil & Gas Operator | Apr 1993 |
| 35 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Aug 2025 |
| 36 | Southern Energy Operating Co Inc | | Oil Operator | Jun 2025 |
| 37 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 38 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 39 | T X P Inc Formerly Petrotech Inc | | Oil & Gas Operator | Jul 1992 |
| 40 | Tiger Development LLC | | Oil & Gas Operator | Aug 2019 |
| 41 | Uptex Operating Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2011 |
| 42 | Venture Oil & Gas, Inc. | Laurel, MS 39440 | Oil & Gas Operator | Jul 2025 |
| 43 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |