| 13301 | Houma Operating Company, Inc. | | Oil & Gas Operator | Jun 1998 |
| 13302 | Houma Salt Water Disposal Corp | | Oil Operator | Dec 2020 |
| 13303 | Hound Resources LLC | | Oil & Gas Operator | Jul 2026 |
| 13304 | Hounds Oil & Gas LLC | Carbon Hill, OH 43111 | Oil & Gas Operator | Dec 2025 |
| 13305 | House Thomas J | | Oil Operator | Jun 2026 |
| 13306 | House, Dustin | Shawnee, KS 66218 | Oil Operator | Mar 2026 |
| 13307 | Houseco Petroleum Inc | Bristow, OK 74010-0842 | Oil & Gas Operator | Aug 2002 |
| 13308 | Householder Oil Co | Junction City, OH 43748 | Oil & Gas Operator | Dec 1988 |
| 13309 | Houseknecht Oil Producers Inc | | Oil & Gas Operator | Dec 1994 |
| 13310 | Housel John R Jr | | Oil Operator | Oct 1994 |
| 13311 | Housel, Robert E. | Cherryvale, KS 67335 | Oil & Gas Operator | Dec 2003 |
| 13312 | Houser, R. G. | | Oil Operator | Mar 1953 |
| 13313 | Houston Energy & Dev. Inc. | | Oil & Gas Operator | Apr 1994 |
| 13314 | Houston Energy Operating, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2020 |
| 13315 | Houston Energy, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2014 |
| 13316 | Houston Expl. & Prod. Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Aug 2003 |
| 13317 | Houston Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 13318 | Houston Gulf Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2026 |
| 13319 | Houston Hydrocarbons, Inc. (A) | Houston, TX 77042 | Oil & Gas Operator | Sep 2004 |
| 13320 | Houston Hydrolan | | Oil Operator | Jul 1984 |
| 13321 | Houston Oil & Gas Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 13322 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 13323 | Houston Oil And Minerals | | Oil & Gas Operator | Oct 1993 |
| 13324 | Houston Oil Fields Company | | Oil & Gas Operator | Apr 1987 |
| 13325 | Houston Oil Prod Enterprises,Inc | Houston, TX 77006 | Oil & Gas Operator | Sep 2026 |
| 13326 | Houston Operating, Inc. | Houston, TX 77027 | Oil & Gas Operator | Sep 2026 |
| 13327 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Sep 2026 |
| 13328 | Houston Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 13329 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Sep 2026 |
| 13330 | Houtchens, DD & Anna D LVNG TRST | Garland, TX 75043 | Oil Operator | Jun 2025 |
| 13331 | Hovgard & Fitzgerald | Abilene, TX 79608 | Oil & Gas Operator | Mar 1996 |
| 13332 | Howard & Taylor | Wynnewood, OK 73098 | Oil & Gas Operator | Jul 2026 |
| 13333 | Howard Drilling Inc | Mount Jewett, PA 16740-0556 | Oil & Gas Operator | Dec 2025 |
| 13334 | Howard E. Caywood Inc. | | Oil & Gas Operator | Jul 2026 |
| 13335 | Howard Energy Co Inc | | Oil & Gas Operator | Aug 2011 |
| 13336 | Howard Exploration, Inc. | Houston, TX 77069 | Oil & Gas Operator | Dec 2025 |
| 13337 | Howard Operating Co. | Saint Jo, TX 76265 | Oil & Gas Operator | Sep 2026 |
| 13338 | Howard'S Well Service | | Oil Operator | Jul 2007 |
| 13339 | Howard, Anthony D | Philpot, KY 42366 | Oil Operator | Dec 2023 |
| 13340 | Howard, Anthony E. F. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2001 |
| 13341 | Howard, Douglas J. | Houston, TX 77070 | Oil & Gas Operator | Mar 2008 |
| 13342 | Howard, Lorna Agent | | Oil & Gas Operator | Dec 2021 |
| 13343 | Howard, Patrick M. | Eden, NY 14057 | Gas Operator | Dec 2025 |
| 13344 | Howard, Terry | Cherry Creek, NY 14723 | Gas Operator | Dec 2025 |
| 13345 | Howco Oil And Gas | Stroud, OK 74079-9604 | Oil & Gas Operator | Mar 2015 |
| 13346 | Howden Petroleum Corp | Wetumka, OK 74883 | Gas Operator | Nov 1997 |
| 13347 | Howdyshell Pumping Inc | Logan, OH 43138 | Oil Operator | Dec 2025 |
| 13348 | Howe, Thomas L. | Hunt, NY 14846 | Gas Operator | Dec 2025 |
| 13349 | Howell & Sandlin, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2001 |
| 13350 | Howell Bill J | Calvin, OK 74531-0248 | Oil & Gas Operator | Sep 2016 |
| 13351 | Howell C W | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2015 |
| 13352 | Howell Crane & Rigging, Inc. | San Antonio, TX 78220 | Oil Operator | Sep 2026 |
| 13353 | Howell Drilling, Inc. | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2003 |
| 13354 | Howell Jason | Wynona, OK 74084 | Oil Operator | Jun 2026 |
| 13355 | Howell Oil & Gas, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Oct 2019 |
| 13356 | Howell Oil Compa | | Oil & Gas Operator | Aug 1995 |
| 13357 | Howell Oil Company | Hutchinson, KS 67504 | Oil & Gas Operator | May 2026 |
| 13358 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 13359 | Howell'S Well Service, Inc. | | Oil & Gas Operator | Jun 2026 |
| 13360 | Howell, Betty L. | Lakewood, NY 14750 | Gas Operator | Dec 2025 |
| 13361 | Howells Oil & Gas | Graysville, OH 45734 | Oil & Gas Operator | Dec 2025 |
| 13362 | Howitzer Operating, LLC | Dallas, TX 75380 | Oil Operator | Sep 2026 |
| 13363 | Howle Operating Account, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1999 |
| 13364 | Howle, A.G. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2011 |
| 13365 | Howles, William A | Savona, NY 14879 | Gas Operator | Dec 2025 |
| 13366 | Hoy Production LLC | | Gas Operator | Jun 2026 |
| 13367 | Hoyt Energy L.L.C. | | Oil Operator | Jul 2026 |
| 13368 | Hoyt John C | Bartlesville, OK 74005-1316 | Oil Operator | Feb 2000 |
| 13369 | Hoyt Oil & Gas LLC | Cushing, OK 74023-0442 | Oil & Gas Operator | Jun 2026 |
| 13370 | HP Operating LLC | Seminole, OK 74868 | Oil Operator | Jul 2026 |
| 13371 | HPC Energy LLC | Midland, TX 79703 | Oil & Gas Operator | Aug 2013 |
| 13372 | HPC Incorporated | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 13373 | HPC Operating, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Mar 2008 |
| 13374 | Hpoc, LLC | Cuba, NM 87013 | Oil Operator | Oct 2025 |
| 13375 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 13376 | HR Energy LLC | Shelby, MT 59474 | Oil & Gas Operator | Jun 2026 |
| 13377 | HR McClure | | Gas Operator | Dec 2018 |
| 13378 | HR Petroleum | Corpus Christ, TX 78413 | Oil & Gas Operator | Apr 1998 |
| 13379 | HRB Oil | Houston, TX 77042 | Oil & Gas Operator | Oct 1998 |
| 13380 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Sep 2026 |
| 13381 | Hrbacek Oil Corp. | La Grange, TX 78945 | Oil & Gas Operator | Feb 2004 |
| 13382 | Hrbek, R. L. | Merino, CO 80741 | Oil & Gas Operator | Jan 2024 |
| 13383 | HRC Inc | Hobbs, NM 88241 | Gas Operator | Jun 2017 |
| 13384 | HRC Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | Nov 2017 |
| 13385 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | May 2026 |
| 13386 | HRF Exploration & Production LLC | Gaylord, MI 49734-0160 | Gas Operator | Sep 2026 |
| 13387 | HRF Exploration & Production,Inc | Denver, CO 80237 | Oil & Gas Operator | Mar 2009 |
| 13388 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 13389 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 13390 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 13391 | HRM Resources III LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2022 |
| 13392 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 13393 | Hronek, Kenneth | Caldwell, TX 77836 | Oil & Gas Operator | Sep 2026 |
| 13394 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 13395 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 13396 | HS Resources | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1997 |
| 13397 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2002 |
| 13398 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 13399 | HT2 Exploration LLC | The Woodlands, TX 77381-4198 | Oil Operator | Jun 2026 |
| 13400 | HTC Gas Company, LLC | Hindman, KY 41822 | Gas Operator | Dec 2023 |