| 1 | H & S Investments LLC | Fairview, PA 16415-1807 | Oil & Gas Operator | Dec 2025 |
| 2 | Ha Goal Inc | Indiana, PA 15701-2664 | Oil & Gas Operator | Dec 2018 |
| 3 | Haddad & Brooks Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2018 |
| 4 | Halcon Opr Co Inc | Houston, TX 77002-5005 | Oil & Gas Operator | Jul 2017 |
| 5 | Hanley & Bird Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2011 |
| 6 | Harmony Oil & Gas Co Inc | Reno, NV 89509 | Oil Operator | Dec 1994 |
| 7 | Harper Crosby Holdings, LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2025 |
| 8 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2025 |
| 9 | Hayden Harper Energy Ka, LLC | Charlotte, NC 28203-4173 | Oil & Gas Operator | Dec 2021 |
| 10 | Henry Patrick K | | Oil & Gas Operator | Dec 2025 |
| 11 | Herman Riemer Gas Co | Sarver, PA 16055-8507 | Oil & Gas Operator | Dec 2016 |
| 12 | HG Energy II Appalachia, LLC | | Oil & Gas Operator | Mar 2022 |
| 13 | Highhouse James R | Warren, PA 16365-7550 | Oil & Gas Operator | Dec 2008 |
| 14 | Highpointe Oil & Gas LLC | Indiana, PA 15701-8944 | Gas Operator | Dec 2025 |
| 15 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Jun 2026 |
| 16 | Hoffman George A | | Oil & Gas Operator | Dec 2022 |
| 17 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 18 | Hollis & Kathryn Nichols | Shinglehouse, PA 16748-2112 | Gas Operator | Dec 2015 |
| 19 | Hollobaugh Paul A | | Gas Operator | Dec 2025 |
| 20 | Home Gas & Oil Co Inc | Indiana, PA 15701-1532 | Oil & Gas Operator | Dec 2025 |
| 21 | Homeland Energy Ventures LLC | | Oil & Gas Operator | Dec 2008 |
| 22 | Hoover Gregory M | Wattsburg, PA 16442-2209 | Gas Operator | Dec 2025 |
| 23 | Houston Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 24 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2025 |
| 25 | HR McClure | Scottdale, PA 15683-1533 | Gas Operator | Dec 2018 |
| 26 | Huffman Arthur | Waynesburg, PA 15370-1437 | Gas Operator | Dec 2025 |
| 27 | Hunt Marcellus Opr Co LLC | Wilcox, PA 15870 | Oil & Gas Operator | Jan 2019 |
| 28 | Huntley & Huntley Inc | Monroeville, PA 15146-2302 | Oil & Gas Operator | Dec 2019 |