| 12301 | Harmel And Shawver Oil LLC | Wichita Falls, TX 76310 | Oil Operator | May 2024 |
| 12302 | Harmon O G LLC | Graysville, OH 45734 | Oil & Gas Operator | Dec 2022 |
| 12303 | Harmon, C. E. Oil, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2019 |
| 12304 | Harmonia Petroleum Corporation | Missouri City, TX 77459 | Oil & Gas Operator | May 2017 |
| 12305 | Harmons Well Service | Graysville, OH 45734 | Oil & Gas Operator | Dec 2019 |
| 12306 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 12307 | Harmony Exploration, Inc. | College Sta, TX 77842 | Oil & Gas Operator | May 2024 |
| 12308 | Harmony Oil & Gas Co Inc | Reno, NV 89509 | Oil Operator | Dec 1994 |
| 12309 | Harmony Producing Co Inc | | Oil & Gas Operator | Dec 1995 |
| 12310 | Harmony Trust | Allegany, NY 14706 | Oil & Gas Operator | Dec 2022 |
| 12311 | Harms Petroleum | | Oil & Gas Operator | May 1991 |
| 12312 | Harms, H. Allan Petroleum Co., Inc. | Great Bend, KS 67530 | Oil Operator | Apr 1999 |
| 12313 | Harms, Vance N. | Talpa, TX 76882 | Oil & Gas Operator | Mar 2016 |
| 12314 | Harnetty Francis Dba Harnetty Oil & Gas | Junction City, OH 43748 | Oil & Gas Operator | Dec 2019 |
| 12315 | Harold G Raper Family Trust | Mansfield, TX 76063-1667 | Oil Operator | May 2023 |
| 12316 | Harold H. Hollenshead | | Oil & Gas Operator | May 2002 |
| 12317 | Harold M Root Foundation | | Oil Operator | Feb 2024 |
| 12318 | Harp Peggy A | Seminole, OK 74868-2284 | Oil & Gas Operator | Jul 2023 |
| 12319 | Harp, Stephen J. | Fredonia, NY 14063 | Gas Operator | Dec 2022 |
| 12320 | Harpel John P Jr | FT. Collins, CO 80525 | Oil & Gas Operator | May 1998 |
| 12321 | Harper Crosby Holdings, LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2023 |
| 12322 | Harper Hefte, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | May 2024 |
| 12323 | Harper Joe Howard Dba J H Field Service | | Oil & Gas Operator | Feb 2024 |
| 12324 | Harper Oil And Gas, LLC | Pratt, KS 67124 | Oil & Gas Operator | Jan 2024 |
| 12325 | Harper Oil Co. | Denver, CO 80217 | Oil & Gas Operator | Jan 2024 |
| 12326 | Harper Production, LLC | Spearman, TX 79081 | Oil & Gas Operator | May 2024 |
| 12327 | Harper, Clint | Woodson, TX 76491 | Oil & Gas Operator | May 2024 |
| 12328 | Harper, Mr. William | Clyde, NY 14433 | Gas Operator | Dec 2022 |
| 12329 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 12330 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 12331 | Harper, William E. Estate Of | Woodson, TX 76491 | Oil & Gas Operator | May 2024 |
| 12332 | Harrell Oil Company LLC | Ardmore, OK 73402 | Oil Operator | Mar 2023 |
| 12333 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 12334 | Harrell Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2008 |
| 12335 | Harrell Petroleum Inc | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Oct 2017 |
| 12336 | Harrell Verlan W | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Nov 1999 |
| 12337 | Harrell, Charles | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 12338 | Harrell, Herbert E | Columbia, KY 42728 | Oil Operator | Dec 2022 |
| 12339 | Harrier Holdings, LTD. | Burnet, TX 78611 | Oil Operator | May 2024 |
| 12340 | Harrigan Energy Partners, Inc. | Houston, TX 77058 | Oil & Gas Operator | Sep 2010 |
| 12341 | Harrigan Operating, LLC | Houston, TX 77258 | Oil & Gas Operator | Apr 2020 |
| 12342 | Harrington Billy B | Depew, OK 74028-3495 | Oil & Gas Operator | May 2006 |
| 12343 | Harrington Oil Inc. | | Oil & Gas Operator | Apr 1978 |
| 12344 | Harrington Orville | Dewey, OK 74029-4504 | Oil Operator | Feb 2024 |
| 12345 | Harrington SR Tommy W | Drumright, OK 74030-5778 | Oil Operator | May 2015 |
| 12346 | Harris & Payne-Randel Drilling | | Oil & Gas Operator | Dec 1989 |
| 12347 | Harris & Walton | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 12348 | Harris B D | Norman, OK 73071-4802 | Oil & Gas Operator | Apr 2014 |
| 12349 | Harris Energy Partners Op, LLC | Fort Worth, TX 76116 | Oil Operator | May 2024 |
| 12350 | Harris Energy Services, LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 12351 | Harris Engineering Co | Dallas, TX 75248 | Oil & Gas Operator | Dec 1996 |
| 12352 | Harris Mildred C | Tulsa, OK 74120 | Oil & Gas Operator | Feb 2024 |
| 12353 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Feb 2024 |
| 12354 | Harris Oil & Gas | | Oil & Gas Operator | Jul 1995 |
| 12355 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 12356 | Harris Olin | Okmulgee, OK 74447-8508 | Oil Operator | Feb 2012 |
| 12357 | Harris, David | Toronto, KS 66777 | Oil Operator | Jan 2024 |
| 12358 | Harris, Jake, Trustee | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2001 |
| 12359 | Harris, Sam E. | Albany, TX 76430 | Oil & Gas Operator | Aug 2003 |
| 12360 | Harris, William H. Jr. | Le Roy, NY 14482 | Gas Operator | Dec 2022 |
| 12361 | Harrison & Lee | | Oil Operator | Sep 1996 |
| 12362 | Harrison Drilling Co | | Oil & Gas Operator | Mar 1981 |
| 12363 | Harrison Energy | Tippecanoe, OH 44699 | Oil & Gas Operator | Dec 2000 |
| 12364 | Harrison Interests, LTD. | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 12365 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Feb 2024 |
| 12366 | Harrison, Dan J III&Bruce F Est | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 12367 | Harrison, Dan J. III&Bruce F. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 12368 | Harrison, Mark V. | Madison, KS 66860 | Oil Operator | Jul 1995 |
| 12369 | Harrison, Sam G. Oil, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2019 |
| 12370 | Harrison, Thomas D | Park City, UT 84060-7307 | Gas Operator | Dec 1998 |
| 12371 | Harrison-Wright Oil Company LLC | | Oil & Gas Operator | Feb 2024 |
| 12372 | Harrod Leasing | Arcadia, OK 73007-0043 | Oil & Gas Operator | Feb 2024 |
| 12373 | Harry Feder | | Oil & Gas Operator | Dec 1999 |
| 12374 | Harry L. Neeb | | Oil Operator | May 1985 |
| 12375 | Harsh International Inc | | Oil & Gas Operator | Dec 2013 |
| 12376 | Hart & McFarland | Vivian, LA 71082 | Oil & Gas Operator | May 2024 |
| 12377 | Hart David | Chickasha, OK 73018-7756 | Oil & Gas Operator | Mar 2015 |
| 12378 | Hart Energies, LLC | Tulsa, OK 74133 | Oil & Gas Operator | Dec 2016 |
| 12379 | Hart Energy LLC | | Oil Operator | Mar 2023 |
| 12380 | Hart Oil & Gas Inc | Houston, TX 77024 | Oil & Gas Operator | Jan 2017 |
| 12381 | Hart Oil, LLC | | Oil Operator | Dec 2014 |
| 12382 | Hart Petroleum Services, Inc | Robstown, TX 78380 | Oil & Gas Operator | May 2024 |
| 12383 | Hart, Nick And Connie | Paola, KS 66071 | Oil Operator | Dec 2023 |
| 12384 | Hartco Oil Co. | | Oil Operator | Jan 2024 |
| 12385 | Hartel, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Aug 1997 |
| 12386 | Harter Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2024 |
| 12387 | Harter Oil Company | | Oil & Gas Operator | Apr 2011 |
| 12388 | Harter, Ron | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 12389 | Hartley Natural Resource Development | | Oil & Gas Operator | Feb 2024 |
| 12390 | Hartline Tom | Drumright, OK 74030-0545 | Oil Operator | Jan 2024 |
| 12391 | Hartman Oil And Gas Company | | Oil Operator | Dec 1998 |
| 12392 | Hartman Oil Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Jan 2024 |
| 12393 | Hartman W L Trus | | Oil Operator | Jun 1992 |
| 12394 | Hartoil Corporation | Post, TX 79356 | Oil & Gas Operator | May 2024 |
| 12395 | Harus Inc | Indiana, PA 15701-9401 | Oil & Gas Operator | Dec 2023 |
| 12396 | Harvard Investments, Inc. | | Oil & Gas Operator | Oct 2002 |
| 12397 | Harvard Petroleum Company, LLC | Roswell, NM 88202 | Oil & Gas Operator | May 2024 |
| 12398 | Harvard Petroleum Corporation | Roswell, NM 88201 | Oil & Gas Operator | Dec 2004 |
| 12399 | Harvest (Us) Holdings, Inc | Houston, TX 77077 | Oil & Gas Operator | Apr 2011 |
| 12400 | Harvest Energy Company | Englewood, CO 80110 | Oil & Gas Operator | Jun 1997 |