| 1 | 4 Boots Oil Company, LLC | Leander, TX 78641 | Oil Operator | Apr 2025 |
| 2 | 4 J'S Production | Zephyr, TX 76890 | Oil & Gas Operator | Apr 2025 |
| 3 | 4 Of Us Resources LLC | Oklahoma City, OK 73170 | Oil & Gas Operator | Jul 2017 |
| 4 | 4 R Investment Co | Erie, PA 16505-4514 | Gas Operator | Dec 2006 |
| 5 | 4 T Energy LLC | Hominy, OK 74035 | Oil & Gas Operator | Jan 2025 |
| 6 | 4-B | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2009 |
| 7 | 4-D Petroleum Consultants,LLC | Preston, KS 67583 | Oil & Gas Operator | Feb 2013 |
| 8 | 4-H Operating Corporation | | Oil & Gas Operator | Oct 2017 |
| 9 | 4-J Oil Co. | Ryan, OK 73565 | Oil & Gas Operator | Mar 2009 |
| 10 | 4-M Oil | | Oil Operator | Dec 2024 |
| 11 | 4-M Operating Company | Abilene, TX 79601 | Oil & Gas Operator | Jun 2015 |
| 12 | 4-Sight Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2006 |
| 13 | 4-Sight Operating Company II | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2000 |
| 14 | 4-Sight Operating Company, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 15 | 4360 Walden Avenue, LLC | Lancaster, NY 14086 | Gas Operator | Dec 2023 |
| 16 | 44 Canyon LLC | | Gas Operator | Mar 2006 |
| 17 | 44 Mag Production Inc | | Gas Operator | Mar 2012 |
| 18 | 442 Operating La, LLC | | Oil & Gas Operator | Dec 2024 |
| 19 | 4927 Bramblewood Trail, LLC | Canandaigua, NY 14424 | Gas Operator | Dec 2023 |
| 20 | 4a Oilfield Enterprises, LLC | Longview, TX 75602 | Oil & Gas Operator | Jan 2024 |
| 21 | 4C Oil, LLC | Cameron, TX 76520 | Oil Operator | Apr 2025 |
| 22 | 4D Energy Co. | Sterling City, TX 76951 | Oil & Gas Operator | Feb 2007 |
| 23 | 4D Oil LLC | Cushing, OK 74023 | Oil Operator | Dec 2024 |
| 24 | 4D'S Enterprises, LLC | Rantoul, KS 66079 | Oil Operator | Sep 2018 |
| 25 | 4D'S Operating Co LLC (The) | Ratliff City, OK 73481 | Oil & Gas Operator | Jan 2025 |
| 26 | 4G Operating LLC | Kinta, OK 74552 | Gas Operator | Jan 2025 |
| 27 | 4H Oil Co. | | Oil Operator | Dec 1992 |
| 28 | 4J Energy LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 29 | 4J Oil Co. LLC | Ryan, OK 73565 | Oil Operator | Apr 2025 |
| 30 | 4J Well Service, Inc | | Oil Operator | Feb 2025 |
| 31 | 4P Energy Texas, LLC | Denver, CO 80206 | Oil & Gas Operator | Nov 2020 |
| 32 | 4R Oil Company | Tyler, TX 75703 | Oil & Gas Operator | Apr 1997 |
| 33 | 4R Petroleum, Inc. | Borger, TX 79008 | Oil & Gas Operator | Apr 2025 |
| 34 | 4W Operating, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 35 | 4W Ranch | Newcastle, WY 82701 | Oil Operator | Apr 2008 |