1 | H E C I Exploration Company | | Oil & Gas Operator | Dec 1990 |
2 | Hal Oil & Gas Co., Inc. | | Oil & Gas Operator | Apr 1993 |
3 | Halcon Resources Operating, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2013 |
4 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
5 | Harbor Operating, LLC | | Oil & Gas Operator | Dec 1999 |
6 | Harbor Petroleum, LLC | Granbury, TX 76049 | Oil & Gas Operator | Dec 2024 |
7 | Hardy Oil & Gas USA Inc. | Houston, TX 77079 | Oil & Gas Operator | Jun 1996 |
8 | Hassie Hunt Expl. Company | Dallas, TX 75201 | Oil & Gas Operator | Aug 2008 |
9 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
10 | Helis Oil & Gas Company, L.L.C. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2023 |
11 | Henderson Pet Corp Of Delaware | | Oil & Gas Operator | Nov 2019 |
12 | Henry Production Company, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2019 |
13 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
14 | Hochendel Consultants | | Oil & Gas Operator | Jul 1995 |
15 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Dec 2024 |
16 | Homer E. Hines, Inc. | | Oil Operator | Sep 1978 |
17 | Houma Operating Company, Inc. | | Oil & Gas Operator | Jun 1998 |
18 | Huffco Petroleum Corporation | | Oil & Gas Operator | Jul 1988 |
19 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
20 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
21 | Hughes Eastern Petroleum, LTD. | | Oil & Gas Operator | Jun 1986 |
22 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
23 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
24 | Hunt Petroleum (Aec), Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
25 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
26 | Hydrocarbon MGMT., Inc. | | Oil & Gas Operator | Mar 1997 |