| 1 | D & G Oil & Gas Company Inc | Enid, OK 73702-2027 | Oil & Gas Operator | Nov 2021 |
| 2 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Oct 2025 |
| 3 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Oct 2025 |
| 4 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Oct 2025 |
| 5 | Darrell'S Drilling Inc | Konawa, OK 74849 | Oil Operator | Jun 2025 |
| 6 | Davco Productions Inc | Springer, OK 73458-8191 | Oil & Gas Operator | Jun 2021 |
| 7 | David Ridley Oil LLC | Tecumseh, OK 74873 | Oil Operator | Jun 2025 |
| 8 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 9 | Davis Henry | Tulsa, OK 74135-3567 | Oil & Gas Operator | Dec 1994 |
| 10 | Daxin Energy Corporation | Seminole, OK 74868-2208 | Oil Operator | Jan 2013 |
| 11 | Deaton, Gary L. Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 2015 |
| 12 | Deck Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2020 |
| 13 | Dehart Company (The) | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2025 |
| 14 | Dell Charles E | Cleveland, OK 74020-0090 | Oil & Gas Operator | Feb 2015 |
| 15 | Delta D Operations | Wilson, OK 73463 | Oil & Gas Operator | Jul 2014 |
| 16 | Delta D Operations Inc | Ardmore, OK 73401-8678 | Oil & Gas Operator | Apr 2014 |
| 17 | Dempsey, Wayne L | | Oil & Gas Operator | Mar 2011 |
| 18 | Derae Oil Company | Seminole, OK 74868-2617 | Oil & Gas Operator | Feb 1997 |
| 19 | Deshields Oil & Gas Inc | Okemah, OK 74859-9612 | Oil & Gas Operator | Sep 2014 |
| 20 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 21 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jun 2025 |
| 22 | Diamond Production Company LLC | Irving, TX 75016-7853 | Oil & Gas Operator | Jun 2025 |
| 23 | Digger Oil & Gas Inc | Prague, OK 74864 | Oil & Gas Operator | Jun 2025 |
| 24 | Dildine Oil Well Service | | Oil Operator | Apr 2011 |
| 25 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 26 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 27 | Driver Energy Of Texas | Dallas, TX 75379-5951 | Oil & Gas Operator | Apr 2011 |
| 28 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 29 | Duck Bros Dozer & Trucking Inc | Konawa, OK 74849 | Oil & Gas Operator | May 2025 |
| 30 | Duck Oil Company LLC | Konawa, OK 74849 | Oil Operator | Jun 2025 |
| 31 | Duncan Oil & Gas Inc | Norman, OK 73072 | Oil & Gas Operator | Sep 2020 |
| 32 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |