| 10001 | Falcon Exploration | | Oil Operator | Dec 1994 |
| 10002 | Falcon Exploration, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 10003 | Falcon Flight, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Apr 1995 |
| 10004 | Falcon Gas Storage Co., Inc. | Houston, TX 77057 | Oil & Gas Operator | Feb 2007 |
| 10005 | Falcon Minerals, LTD. | Houston, TX 77057 | Oil & Gas Operator | May 2010 |
| 10006 | Falcon Oil & Gas Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 2022 |
| 10007 | Falcon Oil Properties LLP | Bristow, OK 74010 | Oil Operator | Jun 2025 |
| 10008 | Falcon Operating Company | Wichita Falls, TX 76302 | Gas Operator | Jan 2000 |
| 10009 | Falcon Production Co. | Floresville, TX 78114 | Oil & Gas Operator | Oct 2025 |
| 10010 | Falcon Production LLC | Austin, TX 78715 | Oil & Gas Operator | Oct 2025 |
| 10011 | Falcon Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2021 |
| 10012 | Falcon Seaboard Oil & Gas LP | Farmington, NM 87499 | Gas Operator | May 1998 |
| 10013 | Falcon-Challenge Oil & Gas Co | Houston, TX 77056 | Oil & Gas Operator | Mar 1993 |
| 10014 | Falconer Central School District | Falconer, NY 14733 | Gas Operator | Dec 2020 |
| 10015 | Falese Oil Co Inc | Mattoon, IL 61938-4122 | Oil & Gas Operator | Dec 1997 |
| 10016 | Falkin, Richard T. | Hepler, KS 66746 | Oil Operator | Nov 2019 |
| 10017 | Falkner, Donald E. | Cassadaga, NY 14718 | Gas Operator | Dec 2024 |
| 10018 | Fallen Timbers Energy LLC | Tulsa, OK 74105-8713 | Oil Operator | Feb 2021 |
| 10019 | Falls City Energy Corporation | Poth, TX 78147 | Oil & Gas Operator | May 2000 |
| 10020 | Falls Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 10021 | Falls Production Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 10022 | Fambrough Oil & Gas, LLC | San Angelo, TX 76905 | Oil & Gas Operator | Oct 2025 |
| 10023 | Fambrough, Tim D. | San Angelo, TX 76905 | Oil & Gas Operator | Nov 2016 |
| 10024 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 10025 | Family Oil Company | | Oil Operator | Jan 2025 |
| 10026 | Family Tree Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2013 |
| 10027 | Family Trust B, The | San Angelo, TX 76904 | Oil & Gas Operator | May 2019 |
| 10028 | Fancher Oil Co. | | Oil & Gas Operator | Sep 1995 |
| 10029 | Fancher Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 10030 | Fancher Oil LLC | Greenwood, CO 80111 | Oil & Gas Operator | Nov 2006 |
| 10031 | Fancher, Geo. H, Jr. | Denver, CO 80202 | Gas Operator | Mar 1996 |
| 10032 | Fanion Production Co. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 1997 |
| 10033 | Fanshier, Roger | Seward, KS 67576 | Oil Operator | Oct 2008 |
| 10034 | Fantasy Oil & Gas Ventures, L.L.C. | | Oil Operator | Dec 2024 |
| 10035 | Fantome, LLC | | Oil Operator | Jan 2007 |
| 10036 | Faoc Operating LLC | Houston, TX 77057 | Oil Operator | Jun 2018 |
| 10037 | Far West Development, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 2025 |
| 10038 | Farabaugh Arthur R & John A | Loretto, PA 15940-8001 | Gas Operator | Dec 2015 |
| 10039 | Fargo Exploration Co. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1995 |
| 10040 | Fargo Oil & Gas, LLC | Corpus Chrsti, TX 78415 | Oil & Gas Operator | Oct 2025 |
| 10041 | Farley Christopher D | Kellyville, OK 74039 | Oil & Gas Operator | Jul 2019 |
| 10042 | Farley, Thomas | Perry, NY 14530 | Gas Operator | Dec 2024 |
| 10043 | Farmer Dog Oil Co., A General Partnership | Humboldt, KS 66748 | Oil Operator | Jun 2025 |
| 10044 | Farmer Inc | | Oil Operator | Dec 2024 |
| 10045 | Farmer Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | Dec 2019 |
| 10046 | Farmer, Hayden | Olney, TX 76374 | Oil & Gas Operator | Feb 1997 |
| 10047 | Farmer, John O., Inc. | Russell, KS 67665 | Oil & Gas Operator | Jun 2025 |
| 10048 | Farmer, Lewis & Hayden | Olney, TX 76374 | Oil & Gas Operator | Oct 2008 |
| 10049 | Farmers Energy Corporation | Tulsa, OK 74103-3525 | Oil & Gas Operator | Nov 2021 |
| 10050 | Farmers Of Tulsa Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Sep 1997 |
| 10051 | Farmers Union Central Exchange, Inc. | | Oil & Gas Operator | May 1983 |
| 10052 | Farmland Industries Inc | Kansas City, MO 64195-0111 | Oil & Gas Operator | Nov 1995 |
| 10053 | Farnsworth & Kaiser Oil Company | Newcastle, WY 82701 | Oil & Gas Operator | Sep 2012 |
| 10054 | Farr Enterprises Inc | West Union, WV 24656 | Oil & Gas Operator | Dec 2021 |
| 10055 | Farrar Carolyn Dba C J Investments | Kingfisher, OK 73750 | Oil & Gas Operator | Sep 2024 |
| 10056 | Farrar Oil Co | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2000 |
| 10057 | Farrar Oilwell S | | Oil & Gas Operator | Jul 1986 |
| 10058 | Farrar Pump & Su | | Oil & Gas Operator | Dec 1996 |
| 10059 | Farrar Pump & Supply Co., Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2009 |
| 10060 | Farrar, William A. III & William H. | Dewittville, NY 14728 | Gas Operator | Dec 2024 |
| 10061 | Farrell Oil Company | Lubbock, TX 79424 | Oil & Gas Operator | Oct 2025 |
| 10062 | Farrex, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Oct 2008 |
| 10063 | Farrington & Hepler Gas & Oil Inc | Seneca, PA 16346-0546 | Oil & Gas Operator | Dec 2024 |
| 10064 | Farrington, Walter L., Jr. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2002 |
| 10065 | Farris Oil, Inc. | Sedan, KS 67361 | Oil Operator | Apr 2025 |
| 10066 | Farris Well Service | | Oil & Gas Operator | Dec 2021 |
| 10067 | Farthing Don Oil | | Oil & Gas Operator | Jun 1994 |
| 10068 | Fas Services, Inc. | | Oil Operator | Apr 2005 |
| 10069 | Faseler, Herb | Hondo, TX 78861 | Oil Operator | Oct 2025 |
| 10070 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 10071 | Fasken, Barbara | Midland, TX 79701 | Oil & Gas Operator | Dec 1995 |
| 10072 | Fastrak Energy, LLC | Cherryvale, KS 67335 | Oil & Gas Operator | Jun 2025 |
| 10073 | Faul Energy, Inc. | | Oil & Gas Operator | Oct 1988 |
| 10074 | Faulconer Energy, LLC | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 10075 | Faulconer Inc* Vernon E | | Gas Operator | Dec 2018 |
| 10076 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Jul 2025 |
| 10077 | Faulkner Corporation | Oklahoma City, OK 73154-9704 | Oil & Gas Operator | Jan 2017 |
| 10078 | Faulkner DRLG Co, Inc | | Oil Operator | Dec 2023 |
| 10079 | Faust H Floyd | Cardington, OH 43315 | Oil Operator | Dec 1998 |
| 10080 | Fawnwood Energy Inc | Bruin, PA 16022-0157 | Oil & Gas Operator | Dec 2019 |
| 10081 | Fay A. Williams | | Oil & Gas Operator | Dec 2024 |
| 10082 | FBF Energy LLC | Tulsa, OK 74120 | Oil & Gas Operator | Jul 2025 |
| 10083 | FBN Operating Co | | Oil Operator | Nov 1986 |
| 10084 | FDF Resources | Newcastle, WY 82701 | Oil & Gas Operator | Aug 2025 |
| 10085 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Oct 2025 |
| 10086 | Fe Co. | Derby, KS 67037 | Oil & Gas Operator | Dec 2009 |
| 10087 | Fe-NM, LLC | Tyler, TX 75711 | Oil & Gas Operator | Aug 2025 |
| 10088 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 10089 | Fear & Duncan | | Oil Operator | Jul 1979 |
| 10090 | Fears George E | | Oil & Gas Operator | Mar 2019 |
| 10091 | Feazel Operating Company, Inc. | | Oil & Gas Operator | Feb 1979 |
| 10092 | Fed Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 10093 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 10094 | Federal Hill Land Co., Inc. | | Gas Operator | Apr 1991 |
| 10095 | Federal Oil & Gas - Rood L L C | | Oil & Gas Operator | Jul 2025 |
| 10096 | Federal Oil, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |
| 10097 | Federated Natural Resources Corp | | Oil & Gas Operator | Oct 1989 |
| 10098 | Federated Natural Resources Corp And Fede | | Oil & Gas Operator | Feb 1989 |
| 10099 | Federated Oil & Gas Properties | Traverse City, MI 49685 | Gas Operator | Mar 2014 |
| 10100 | Federated Oil And Gas Properties Inc | | Oil & Gas Operator | Jul 2025 |