| 13401 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 13402 | HKW Oil Company, Inc. | Bunker Hill, KS 67626 | Oil Operator | Dec 2009 |
| 13403 | HLH Drilling Inc | Andover, OH 44003 | Oil & Gas Operator | Dec 1985 |
| 13404 | HLH Realty Co | Drumright, OK 74030 | Oil & Gas Operator | Mar 2016 |
| 13405 | HMD Oil Co Inc | Ardmore, OK 73401-2542 | Oil & Gas Operator | Sep 2025 |
| 13406 | HMH Operators, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 13407 | HMN Partnership | Argonia, KS 67004 | Oil Operator | Nov 1993 |
| 13408 | HMT Genesis Petroleum Corp. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 2008 |
| 13409 | HMT Pipeline Company, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2025 |
| 13410 | HMX Investments, Inc. | Katy, TX 77494 | Oil & Gas Operator | Aug 2025 |
| 13411 | HNG Oil Company | | Oil & Gas Operator | Jun 1987 |
| 13412 | HNG Storage Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2002 |
| 13413 | Hoag Memorial Hospital Presbyterian | | Gas Operator | Sep 2025 |
| 13414 | Hoard John L Family Trust | Ardmore, OK 73402-1706 | Oil & Gas Operator | Jun 2022 |
| 13415 | Hobbs Energy Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 13416 | Hobbs Oil Co. | | Oil Operator | Dec 1999 |
| 13417 | Hobbs Production LLC | | Oil Operator | Mar 2023 |
| 13418 | Hobbs, Columbus Agent | | Oil & Gas Operator | Dec 2018 |
| 13419 | Hobbs, Donald M. | Edinboro, PA 16412 | Gas Operator | Dec 2024 |
| 13420 | Hobo Oil & Gas | | Oil & Gas Operator | Aug 2013 |
| 13421 | Hobson Petroleum Corp | | Oil & Gas Operator | Sep 1991 |
| 13422 | Hoc Ca LLC | | Oil & Gas Operator | Nov 2025 |
| 13423 | Hoc Operating Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Nov 1999 |
| 13424 | Hochendel Consultants | | Oil & Gas Operator | Jul 1995 |
| 13425 | Hocking Hills Energy And Well Service LLC | Logan, OH 43138-8497 | Oil & Gas Operator | Dec 2024 |
| 13426 | Hocking Technical College | Nelsonville, OH 45764 | Oil & Gas Operator | Dec 2024 |
| 13427 | Hockran, Thomas A. | Bemus Point, NY 14712 | Gas Operator | Dec 2024 |
| 13428 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 13429 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Sep 2025 |
| 13430 | Hodgden, Jack D. | Enid, OK 73702 | Oil & Gas Operator | Apr 2000 |
| 13431 | Hodge T F | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 13432 | Hodge, T.F. & Morrow Oil & Gas Co. | | Oil & Gas Operator | Sep 1993 |
| 13433 | Hodges & Hodges Oil Venture | Gallup, NM 87301 | Oil Operator | May 1999 |
| 13434 | Hodges & Hodges Productions | Anson, TX 79501 | Oil & Gas Operator | Aug 2003 |
| 13435 | Hodges & Rister | Abilene, TX 79603 | Oil & Gas Operator | Apr 2016 |
| 13436 | Hodges Oil | | Oil Operator | Jun 2025 |
| 13437 | Hodges, Dennis D. And Peggy D. | Reading, KS 66868 | Oil Operator | Jun 2025 |
| 13438 | Hodges, James Aaron | Fort Worth, TX 76179 | Oil & Gas Operator | Dec 2025 |
| 13439 | Hodges, Thomas | Alvord, TX 76225 | Oil & Gas Operator | Oct 2002 |
| 13440 | Hodges, Tommie Ann | Alvord, TX 76225 | Oil & Gas Operator | Jun 2018 |
| 13441 | Hoefle Oil Company | | Gas Operator | Dec 2011 |
| 13442 | Hoehn French | Enid, OK 73701-5600 | Oil & Gas Operator | Oct 1996 |
| 13443 | Hoehn Oil | Wellsville, KS 66092 | Oil Operator | Oct 1998 |
| 13444 | Hoehn Oil LLC | Wellsville, KS 66092 | Oil Operator | Jun 2025 |
| 13445 | Hoell Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 13446 | Hoelscher, Weldon | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 13447 | Hoener Ross Inco | | Oil Operator | Dec 1991 |
| 13448 | Hoener, Ross | Iuka, KS 67066 | Oil & Gas Operator | May 2025 |
| 13449 | Hoepker, Larry | Humboldt, KS 66748 | Oil Operator | Dec 2024 |
| 13450 | Hoermann, S. E. | Seguin, TX 78155 | Oil & Gas Operator | Dec 2025 |
| 13451 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 13452 | Hoff Elmer & Mildred | | Oil & Gas Operator | Jan 1991 |
| 13453 | Hoff Oil & Gas | | Oil Operator | May 2013 |
| 13454 | Hoffman George A | | Oil & Gas Operator | Dec 2022 |
| 13455 | Hoffman Oil & Gas Company | | Oil & Gas Operator | Aug 1997 |
| 13456 | Hoffman Oil, Inc. | Claflin, KS 67525 | Oil Operator | Jun 2025 |
| 13457 | Hoffman Petroleu | | Oil Operator | Sep 1989 |
| 13458 | Hoffman Petroleum, Inc. | Littleton, CO 80120 | Oil Operator | Sep 1996 |
| 13459 | Hoffman Resources LLC | Hoisington, KS 67544 | Oil & Gas Operator | Jun 2025 |
| 13460 | Hoffman, Brian | Claflin, KS 67525 | Oil Operator | May 2025 |
| 13461 | Hoffman, Carol | Strykersville, NY 14145 | Gas Operator | Dec 2024 |
| 13462 | Hoffman, Myrle F. | Denver, CO 80202 | Oil Operator | Dec 1986 |
| 13463 | Hoffmann Oil Company | Eastland, TX 76448 | Oil & Gas Operator | Dec 2025 |
| 13464 | Hofland, James D. | Kevin, MT 59454 | Oil & Gas Operator | Sep 2025 |
| 13465 | Hog Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 13466 | Hogan Drilling Company, Inc. | | Oil & Gas Operator | Mar 1981 |
| 13467 | Hogan Energy Corporation | | Oil & Gas Operator | Oct 1999 |
| 13468 | Hogan Energy, Inc. | | Oil & Gas Operator | Dec 2015 |
| 13469 | Hogan Exploration, Inc. | | Oil & Gas Operator | Mar 2000 |
| 13470 | Hogan, Wayne Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Jun 2006 |
| 13471 | Hogback Exploration Inc | Fort Smith, AR 72916 | Oil & Gas Operator | Sep 2025 |
| 13472 | Hoge Oil & Gas Expl Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Sep 2023 |
| 13473 | Hoggard, Kenneth | Loving, TX 76460 | Oil & Gas Operator | Dec 2025 |
| 13474 | Hogoboom Al Oilf | | Oil Operator | Oct 1990 |
| 13475 | Hoke Jr J T | Edmond, OK 73034 | Oil Operator | Nov 1998 |
| 13476 | Hokio LLC | Norman, OK 73072 | Oil Operator | Aug 2025 |
| 13477 | Holbein & Wright Resources Inc. | Bandera, TX 78003 | Oil & Gas Operator | Dec 2025 |
| 13478 | Holbrook LLC | Bimble, KY 40915 | Oil & Gas Operator | Jun 2025 |
| 13479 | Holco Oil & Gas | Borger, TX 79008 | Oil & Gas Operator | Dec 2025 |
| 13480 | Holcomb Company, The | Freer, TX 78357 | Oil & Gas Operator | Aug 1996 |
| 13481 | Holcomb Enterprises | Clyde, TX 79510 | Oil & Gas Operator | Aug 2003 |
| 13482 | Holcomb Oil & Gas Inc | Farmington, NM 87401 | Oil & Gas Operator | Sep 2025 |
| 13483 | Holcomb Oil Comp | | Oil Operator | Sep 1991 |
| 13484 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 13485 | Holden Harold B | Billings, MT 59103 | Oil Operator | Jun 1996 |
| 13486 | Holden Oil & Gas | Abilene, TX 79608 | Oil & Gas Operator | Dec 2024 |
| 13487 | Holden-Brooke Oil & Gas Co. | George West, TX 78022 | Oil & Gas Operator | Sep 2005 |
| 13488 | Holifield Oil Company | Giddings, TX 78942 | Oil & Gas Operator | Mar 2009 |
| 13489 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Aug 2025 |
| 13490 | Holl Investment Co | Logan, OH 43138 | Oil & Gas Operator | Dec 2019 |
| 13491 | Holland Assoc | | Oil Operator | Sep 1987 |
| 13492 | Holland Oil & Gas | Brookesmith, TX 76827 | Oil & Gas Operator | Dec 2010 |
| 13493 | Holland Oil Co. | Petrolia, TX 76377 | Oil Operator | Aug 2010 |
| 13494 | Holland Production Co | | Oil Operator | Aug 1982 |
| 13495 | Holland, W. M. | Petrolia, TX 76377 | Oil & Gas Operator | Jul 2009 |
| 13496 | Hollandsworth & Travis | Longview, TX 75606 | Oil & Gas Operator | Mar 2001 |
| 13497 | Hollandsworth & Travis Oil | Longview, TX 75606 | Oil Operator | May 2003 |
| 13498 | Holleman & Parks Oil & Gas Inc | | Oil & Gas Operator | May 1995 |
| 13499 | Hollenbeck, Lloyd D. | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 13500 | Hollenshead Oil Co. | | Oil & Gas Operator | Mar 1992 |