| 1 | 3 $ Oil Company | Lubbock, TX 79413 | Oil Operator | Dec 1997 |
| 2 | 3 & 1 Operating Inc | | Oil & Gas Operator | Aug 2015 |
| 3 | 3 Amigos Oil Co. | Odessa, TX 79766 | Oil & Gas Operator | Oct 2025 |
| 4 | 3 B Energy, Inc. | Neodesha, KS 66757 | Oil & Gas Operator | Dec 2012 |
| 5 | 3 B Enterprises, Inc. | Gordon, TX 76453 | Oil & Gas Operator | Oct 2025 |
| 6 | 3 BC Co Inc | Cushing, OK 74023-1268 | Oil & Gas Operator | Mar 2022 |
| 7 | 3 G Oil Co. | | Oil Operator | Jun 2025 |
| 8 | 3 H Operating Company LLC | Walters, OK 73572-3897 | Oil Operator | Jun 2025 |
| 9 | 3 Knight'S LLC | Carlsbad, NM 88220 | Oil Operator | Jul 2025 |
| 10 | 3 Knights Operating LLC | Lubbock, TX 79424 | Oil Operator | Jun 2025 |
| 11 | 3 M Drilling | MT Hope, OH 44660 | Oil & Gas Operator | Dec 1993 |
| 12 | 3 S Production, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 13 | 3 W Investments LLC | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 14 | 3 Wells, LLC | Mayville, NY 14757 | Gas Operator | Dec 2024 |
| 15 | 3-C | Olney, TX 76374 | Oil & Gas Operator | Mar 2008 |
| 16 | 3-C Oil Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Nov 2002 |
| 17 | 3-D Oil & Gas | Winters, TX 79567 | Oil & Gas Operator | Oct 2025 |
| 18 | 3-D Oil Company, A General Partnership | Dewey, OK 74029 | Oil Operator | Nov 2017 |
| 19 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 20 | 3-M Energy Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2017 |
| 21 | 3-R Production, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 22 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 23 | 3-T Oil | | Oil Operator | Dec 1996 |
| 24 | 306 Oil Investment Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 25 | 31 Operating | | Oil & Gas Operator | Jul 2022 |
| 26 | 31 Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 27 | 314 Operating | Rotan, TX 79546 | Oil Operator | Oct 2025 |
| 28 | 324 Oil & Gas, LTD. | Sugar Land, TX 77479 | Oil & Gas Operator | Jun 2023 |
| 29 | 324 Ranch Oil | Goliad, TX 77963 | Oil & Gas Operator | Jun 2004 |
| 30 | 3315 South Creek LLC | Orchard Park, NY 14127 | Gas Operator | Dec 2024 |
| 31 | 333 Dick Road LLC | Clarence, NY 14031 | Gas Operator | Dec 2024 |
| 32 | 338 Oil & Gas, Inc. | Devine, TX 78016 | Oil Operator | Feb 2021 |
| 33 | 360 Mining, Inc. | Austin, TX 78701 | Gas Operator | Oct 2025 |
| 34 | 375 Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 35 | 38 Oil & Gas, L.L.C. | Fullerton, CA 92834 | Oil & Gas Operator | Oct 2025 |
| 36 | 39 Crude, L.C. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 37 | 3B Ranch | Houston, TX 77035 | Oil Operator | Oct 2025 |
| 38 | 3D Oil Company, LLC | Corpus Chrsti, TX 78406 | Oil & Gas Operator | Oct 2025 |
| 39 | 3fearns LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2025 |
| 40 | 3G Production, LLC | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 41 | 3HP, Inc. | Brownwood, TX 76804 | Oil & Gas Operator | May 2016 |
| 42 | 3M Production Inc | Guthrie, OK 73044-1246 | Oil & Gas Operator | Jun 2025 |
| 43 | 3MB Oil & Gas LLC | Irvine, CA 92616 | Oil & Gas Operator | Jul 2025 |
| 44 | 3P Operations LLC | Hartford, KY 42347 | Oil Operator | Dec 2018 |
| 45 | 3R Oil Corporation | Healdton, OK 73438-0306 | Oil Operator | Apr 2022 |
| 46 | 3R Operating , LLC | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 47 | 3R-B Oil Venture | Luling, TX 78648 | Oil & Gas Operator | Feb 2012 |
| 48 | 3RP Operating | | Oil Operator | Dec 2024 |
| 49 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 50 | 3turtle Oil & Gas, LLC | San Angelo, TX 76904 | Oil Operator | Oct 2025 |
| 51 | 3W Production LLC | Fritch, TX 79036 | Oil Operator | Oct 2025 |