| 13301 | HRF Exploration & Production,Inc | Denver, CO 80237 | Oil & Gas Operator | Mar 2009 |
| 13302 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 13303 | HRL Oilfields In | | Oil Operator | Jun 1998 |
| 13304 | HRM Resources II, LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 13305 | HRM Resources III LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2022 |
| 13306 | HRM Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2015 |
| 13307 | Hronek, Kenneth | Caldwell, TX 77836 | Oil & Gas Operator | Jun 2026 |
| 13308 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 13309 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 13310 | HS Resources | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1997 |
| 13311 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2002 |
| 13312 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 13313 | HTC Gas Company, LLC | Hindman, KY 41822 | Gas Operator | Dec 2023 |
| 13314 | Hub Oil Company | | Oil Operator | Jan 1990 |
| 13315 | Hub-Cap Oil Company | Arlington, TX 76016 | Oil & Gas Operator | Dec 2013 |
| 13316 | Hub-Hill Inc | San Antonio, TX 78230 | Oil Operator | Nov 1998 |
| 13317 | Hubbard Creek Coal Gas LLC | | Gas Operator | Apr 2026 |
| 13318 | Hubbard Operating | Ozona, TX 76943 | Gas Operator | Jun 2026 |
| 13319 | Hubbs III, LLC | | Oil & Gas Operator | Mar 2024 |
| 13320 | Hubcap Oil, LLC | Boerne, TX 78015 | Oil Operator | Jun 2026 |
| 13321 | Hubco Exploration Inc. | Houston, TX 77073 | Oil & Gas Operator | Sep 2002 |
| 13322 | Huber Energy L.P. | Houston, TX 77079 | Oil & Gas Operator | Feb 2007 |
| 13323 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 13324 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Jun 2026 |
| 13325 | Huber J M Corpor | | Oil & Gas Operator | Dec 1996 |
| 13326 | Huber Oil Company, A General Partnership | Madison, KS 66860 | Oil & Gas Operator | Feb 2026 |
| 13327 | Hubl/Harbin | | Oil Operator | Dec 1994 |
| 13328 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Mar 2026 |
| 13329 | Hudgens Lester E | Bartlesville, OK 74006-0215 | Oil Operator | Mar 2015 |
| 13330 | Hudgens Operating Co., Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jul 1995 |
| 13331 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 13332 | Hudson Brothers, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Jun 2007 |
| 13333 | Hudson Energy LLC | | Oil Operator | Apr 2026 |
| 13334 | Hudson Group LLC | Casper, WY 82601 | Oil & Gas Operator | Jul 2025 |
| 13335 | Hudson Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 13336 | Hudson, Comer Oil & Gas | Cisco, TX 76437 | Oil & Gas Operator | Jan 2003 |
| 13337 | Huey Dean | | Oil Operator | Oct 2000 |
| 13338 | Hufco, Incorporated | | Oil & Gas Operator | Dec 2020 |
| 13339 | Huff Minerals, LTD. | Amarillo, TX 79101 | Gas Operator | Jun 2026 |
| 13340 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 13341 | Huffco Petroleum Corporation | | Oil & Gas Operator | Jul 1988 |
| 13342 | Huffman Arthur | Waynesburg, PA 15370-1437 | Gas Operator | Dec 2025 |
| 13343 | Huffman, H. L., LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 1994 |
| 13344 | Huffman-Bowers Inc | New Lexington, OH 43764 | Oil & Gas Operator | Dec 2025 |
| 13345 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 13346 | Huggs Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2003 |
| 13347 | Huggs Inc. & Bec, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13348 | Huggs Incorporated, Et Al | | Oil & Gas Operator | Feb 1998 |
| 13349 | Hugh A. Hawthorne, Et Al | | Oil & Gas Operator | Dec 1978 |
| 13350 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 13351 | Hughes & New Oil Co. | | Oil Operator | Jul 1993 |
| 13352 | Hughes & New-D. Braswell | | Oil & Gas Operator | Jun 1983 |
| 13353 | Hughes & Patterson Oper. Corp. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 13354 | Hughes & Shawver | Olney, TX 76374 | Oil & Gas Operator | Aug 1996 |
| 13355 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 13356 | Hughes Drilling Co Inc | Enid, OK 73702 | Oil & Gas Operator | Apr 1998 |
| 13357 | Hughes Drilling Co, A General Partnership | Wellsville, KS 66092 | Oil Operator | Feb 2026 |
| 13358 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Mar 2026 |
| 13359 | Hughes Eastern Petroleum, Inc. | | Oil & Gas Operator | Apr 1993 |
| 13360 | Hughes Eastern Petroleum, LTD | | Oil & Gas Operator | Jun 1986 |
| 13361 | Hughes Gas Systems LLC | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Mar 2026 |
| 13362 | Hughes George B | Asher, OK 74826-0165 | Oil & Gas Operator | Mar 2011 |
| 13363 | Hughes Legacy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2022 |
| 13364 | Hughes Oil Company Inc | Odessa, TX 79765 | Oil & Gas Operator | Feb 2004 |
| 13365 | Hughes Petroleum Corp. | | Oil Operator | Dec 1972 |
| 13366 | Hughes River Oil & Gas Company | Walker, WV 26180-0000 | Oil & Gas Operator | Dec 2021 |
| 13367 | Hughes Services, LLC | Wellsville, KS 66092 | Oil Operator | Feb 2026 |
| 13368 | Hughes Supplies, Inc. | Greenwood, LA 71033 | Oil & Gas Operator | Jul 2019 |
| 13369 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 13370 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 13371 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 13372 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Jun 2026 |
| 13373 | Hughes, Wise & Assoc., Inc | | Oil Operator | Jul 1987 |
| 13374 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 13375 | Hughes-Leckelt-Maybrier PRDCRS | | Oil Operator | Mar 2022 |
| 13376 | Hughes-Nicklaus Oil Co., LTD. | | Oil & Gas Operator | Feb 1986 |
| 13377 | Hughey, Gaylord T. SR. Oper. Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 1998 |
| 13378 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 13379 | Hugoton Energy C | | Oil & Gas Operator | Feb 2004 |
| 13380 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 13381 | Hugoton Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jun 2026 |
| 13382 | Hugus Investment Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2026 |
| 13383 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 13384 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 13385 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 13386 | Hull Enterprises Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Sep 2023 |
| 13387 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 13388 | Hull, Gerald Walter | Leicester, NY 14481 | Gas Operator | Dec 2024 |
| 13389 | Hulse Steve & Frank | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2000 |
| 13390 | Hulse, J. T. | Archer City, TX 76351 | Oil & Gas Operator | Jun 2026 |
| 13391 | Hulse, Tommy P. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2009 |
| 13392 | Hulsebosch, Jessica | | Gas Operator | Dec 2024 |
| 13393 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 13394 | Hulsey Oil Company | Dallas, TX 75205 | Oil & Gas Operator | Aug 1999 |
| 13395 | Humak Processors, Inc. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2005 |
| 13396 | Humber Oil Company | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 13397 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |
| 13398 | Humerickhouse Oil, LLC | Ottawa, KS 66067 | Oil Operator | Feb 2026 |
| 13399 | Humerickhouse, Donald L. | Ottawa, KS 66067 | Oil Operator | Dec 2009 |
| 13400 | Hummingbird Oil, LLC | Sedan, KS 67361 | Oil Operator | Feb 2026 |