| 1 | H & L Exploration Company, LLC | Amarillo, TX 79114 | Oil & Gas Operator | Nov 2024 |
| 2 | H & S Drilling Co Inc | Frazeysburg, OH 43822-0040-0040 | Oil & Gas Operator | Dec 2016 |
| 3 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 4 | Harlow Corporation, The | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2014 |
| 5 | Helton Petroleum | Pampa, TX 79066 | Oil & Gas Operator | Nov 2024 |
| 6 | Helton, Pat A. & Alberta | Allison, TX 79003 | Oil & Gas Operator | Nov 2024 |
| 7 | Henry Paul Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Nov 2024 |
| 8 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Nov 2024 |
| 9 | Herrmann, J.B. | Amarillo, TX 79159 | Oil & Gas Operator | Aug 2019 |
| 10 | Herrmann, S. W. Oil & Gas | Amarillo, TX 79159 | Oil & Gas Operator | Nov 2024 |
| 11 | Hess Production | Quitaque, TX 79255 | Oil & Gas Operator | Nov 2024 |
| 12 | Holland Oil Co. | Petrolia, TX 76377 | Oil Operator | Aug 2010 |
| 13 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 14 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Nov 2024 |
| 15 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 16 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Nov 2024 |
| 17 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Nov 2024 |
| 18 | Hy-Tech, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Feb 2017 |