| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 2 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 3 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 4 | Denovo Oil & Gas, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 1995 |
| 5 | Desco Oil Company | Houston, TX 77056 | Oil & Gas Operator | Feb 2017 |
| 6 | Diamond S Operating Co. | Oil & Gas Operator | Oct 1992 | |
| 7 | Dow Intrastate Gas Company | Oil Operator | Dec 2023 | |
| 8 | Drew Cornell, Inc. | Oil & Gas Operator | Jun 1992 | |
| 9 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |