1 | D & W Oil & Gas Co. | | Gas Operator | Jan 1990 |
2 | D-Ram Construction Co., Inc. | | Gas Operator | Dec 1990 |
3 | D. J. Simmons & Co. Of La. | | Gas Operator | Nov 1996 |
4 | David L. Whittington | | Gas Operator | Dec 1998 |
5 | David L. Whittington Inc | | Gas Operator | Sep 2022 |
6 | DCP Midstream, LLC | | Oil Operator | Jun 2016 |
7 | Delhi Gas Pipeline Corporation | Palestine, TX 75802 | Oil & Gas Operator | Feb 1998 |
8 | Devon Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
9 | Devon Energy Operating Co., L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2009 |
10 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
11 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
12 | Diablo Oil Corp. | | Oil & Gas Operator | Apr 1989 |
13 | Diamond Shamrock Corp | Amarillo, TX 79105 | Oil & Gas Operator | Jan 1987 |
14 | Diamond Shamrock Expl. Co. | | Oil & Gas Operator | Jun 1987 |
15 | Ditta Exploration Co., Inc. | | Oil & Gas Operator | Feb 1990 |
16 | Drake Energy Corporation | | Gas Operator | Dec 2023 |
17 | DRD Operating Company | | Oil & Gas Operator | Feb 2014 |
18 | Drum Energy, L.L.C. | | Gas Operator | Dec 2016 |
19 | Dubach Gas Company | | Oil Operator | May 2003 |
20 | Duke Energy Field Services LLC | | Oil Operator | Dec 2006 |