| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | D & H Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2024 |
| 2 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | May 2024 |
| 3 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | May 2024 |
| 4 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | May 2024 |
| 5 | Dallas Operating Corp. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2006 |
| 6 | Dallas Production, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2021 |
| 7 | Darkens Oil & Gas Inc. | MC Camey, TX 79752 | Oil & Gas Operator | May 2024 |
| 8 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 9 | Deg Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Feb 2007 |
| 10 | Delek Energy Systems Us Inc | Denver, CO 80202 | Oil & Gas Operator | Oct 2011 |
| 11 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 12 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 13 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 14 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 15 | Diamond M Oil Co., Inc. | Monahans, TX 79756 | Oil & Gas Operator | May 2024 |
| 16 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 17 | Dickson Petroleum, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2000 |
| 18 | Dillard, A. W., Jr. | Midland, TX 79701 | Oil & Gas Operator | Jan 1995 |
| 19 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 20 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 2014 |
| 21 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | May 2024 |
| 22 | Driscoll S.W.D. Inc. | San Antonio, TX 78229 | Oil & Gas Operator | May 2024 |
| 23 | DSR Oil & Gas, Inc. | Monahans, TX 79756 | Oil & Gas Operator | May 2024 |
| 24 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Feb 2024 |
| 25 | Dune Oil And Gas, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Aug 2006 |
| 26 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 27 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |