| 1 | D & B Operating LLC | | Oil Operator | Jan 2023 |
| 2 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Apr 2024 |
| 3 | D & G Operating Company, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 4 | D & L Operating LLC | Morris, OK 74445-4820 | Oil & Gas Operator | Jan 2024 |
| 5 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Apr 2024 |
| 6 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2024 |
| 7 | Darling Oil Corporation | Lamont, OK 74643-0158 | Oil & Gas Operator | Jan 2024 |
| 8 | Darnell Jim Operating Co | Okmulgee, OK 74447-8988 | Oil & Gas Operator | Jul 2023 |
| 9 | Davis & Davis | | Oil & Gas Operator | Dec 2021 |
| 10 | Davis & Davis Oil Properties Inc | Morris, OK 74445-0195 | Oil Operator | Jan 2024 |
| 11 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 12 | Davis J L | | Oil & Gas Operator | Aug 2006 |
| 13 | Davis Jim L | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 14 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Jan 2024 |
| 15 | Derrick Resources Inc. | Henryetta, OK 74437-4249 | Oil & Gas Operator | Jan 2024 |
| 16 | Dexxon, Inc. | Kiefer, OK 74041 | Oil & Gas Operator | Jan 2024 |
| 17 | Diamond Energy Partners LLC | Vienna, OH 44473 | Oil & Gas Operator | Jan 2024 |
| 18 | Dillingham Ranch LC | Tulsa, OK 74152 | Oil & Gas Operator | May 2013 |
| 19 | Dixon J C | Okmulgee, OK 74447-8522 | Oil & Gas Operator | Jan 2024 |
| 20 | Dobson Oil Operators Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Dec 2004 |
| 21 | Doneghy James | Wellington, TX 79095 | Oil & Gas Operator | May 2013 |
| 22 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Jan 2024 |
| 23 | Drumright Well Service Inc | Oilton, OK 74052-0190 | Oil & Gas Operator | Jan 2024 |
| 24 | Dual Operating & Production Co | Tulsa, OK 74145-7831 | Oil & Gas Operator | Apr 2020 |
| 25 | Duncan Ronald R | Okemah, OK 74859-9603 | Oil & Gas Operator | Aug 2023 |
| 26 | Dunlap Drilling & Prod Inc | Glenpool, OK 74033-4206 | Oil & Gas Operator | Jan 2024 |
| 27 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 28 | Durossette Floyd R | Warner, OK 74469-0548 | Oil & Gas Operator | Apr 2011 |
| 29 | Durossette Jr Jess | Haskell, OK 74436 | Oil Operator | Mar 2007 |
| 30 | DW Oil & Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 31 | Dyer Dale E Dba The Loving Company | Tulsa, OK 74157-9451 | Oil & Gas Operator | Jan 2024 |
| 32 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 33 | Dyno Energy LLC | Oklahoma City, OK 73154-0964 | Oil & Gas Operator | Jan 2024 |