| 28201 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | May 2024 |
| 28202 | SWN Production (Ohio), LLC | Morgantown, WV 26508 | Oil & Gas Operator | Mar 2024 |
| 28203 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Sep 2024 |
| 28204 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 28205 | Swo & Ism, LLC | | Oil & Gas Operator | Dec 2021 |
| 28206 | Swope Corp. | Austin, TX 78735 | Oil & Gas Operator | Nov 2024 |
| 28207 | SWS | Humble, TX 77338 | Oil Operator | Nov 2024 |
| 28208 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Jul 2024 |
| 28209 | SWV Energy Operating LLC | Cypress, TX 77429 | Gas Operator | Dec 2018 |
| 28210 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 28211 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Nov 2024 |
| 28212 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 28213 | Sydson Energy, Inc. | Houston, TX 77027 | Oil & Gas Operator | Nov 2024 |
| 28214 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 28215 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Nov 2024 |
| 28216 | Sylvan Energy, LLC | Pittsburgh, PA 15211 | Oil & Gas Operator | Nov 2024 |
| 28217 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 28218 | Sylvite Corp | Tulsa, OK 741363908 | Oil & Gas Operator | Dec 2000 |
| 28219 | Symank, Steve | Olney, TX 76374 | Oil & Gas Operator | Nov 2024 |
| 28220 | Symba American Oil, Inc | Houston, TX 77056 | Oil Operator | Nov 2024 |
| 28221 | Synd Enterprises Inc | Lakewood, NY 14750-9613 | Oil & Gas Operator | Dec 2006 |
| 28222 | Syndex Resources, Inc. | Wellesley, MA 02181-000 | Oil & Gas Operator | Dec 2021 |
| 28223 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2024 |
| 28224 | Synergy Development Corp | | Oil Operator | Apr 2011 |
| 28225 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |
| 28226 | Synergy Oil & Gas LLC | | Oil & Gas Operator | Aug 2024 |
| 28227 | Synergy Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Nov 2019 |
| 28228 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 28229 | Synergy Oil & Gas, L.P. | Houston, TX 77024 | Oil & Gas Operator | May 2012 |
| 28230 | Synergy Operating Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Nov 2024 |
| 28231 | Synergy Operating LLC | Farmington, NM 87499 | Oil & Gas Operator | Jul 2024 |
| 28232 | Synergy Production Company | Houston, TX 77024 | Oil & Gas Operator | Jan 1996 |
| 28233 | Synergy Resources | Artesia, NM 88210 | Oil & Gas Operator | Jan 2015 |
| 28234 | Synergy Resources Corporation | | Oil & Gas Operator | Oct 2022 |
| 28235 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Nov 2024 |
| 28236 | Synthetic Energy Corporation | Houston, TX 77006 | Oil Operator | Nov 2024 |
| 28237 | Szumigala, Edward R. & Ruth A. | Dunkirk, NY 14048 | Gas Operator | Dec 2023 |
| 28238 | T & B Oil Company Inc | Ardmore, OK 73401-3709 | Oil & Gas Operator | Apr 2015 |
| 28239 | T & B Resources | | Oil & Gas Operator | Jul 1990 |
| 28240 | T & C MFG. & Operating, Inc. | Great Bend, KS 67530 | Oil Operator | May 2022 |
| 28241 | T & C Oil, Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 28242 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 28243 | T & D Oil Co. | Victoria, KS 67671 | Oil Operator | Apr 1996 |
| 28244 | T & D Oil Compan | | Oil Operator | Jan 1992 |
| 28245 | T & D Oil LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Aug 2024 |
| 28246 | T & F Exploration, LP | Pittsburgh, PA 15241-1375 | Oil & Gas Operator | Oct 2023 |
| 28247 | T & F Oil Company | | Oil Operator | Jun 2024 |
| 28248 | T & F Oil Company, LLC | | Oil Operator | Oct 2011 |
| 28249 | T & G Energy LLC | Dallas, TX 75230 | Oil Operator | Nov 2010 |
| 28250 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 28251 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 28252 | T & I Petroleum Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2005 |
| 28253 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Aug 2024 |
| 28254 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 28255 | T & K Oil Inc | Stephens, AR 71764 | Oil Operator | Jul 2024 |
| 28256 | T & L Oil Production | | Oil Operator | Jul 2024 |
| 28257 | T & L Production | | Oil Operator | May 1987 |
| 28258 | T & L Production Company | | Oil Operator | Feb 1984 |
| 28259 | T & M Gauging | | Oil Operator | Oct 2006 |
| 28260 | T & M Oil & Royalty | Ada, OK 74820 | Oil Operator | Feb 2012 |
| 28261 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Nov 2024 |
| 28262 | T & O Gas Co | | Oil Operator | May 2001 |
| 28263 | T & P Exploration | Addison, TX 75006 | Oil & Gas Operator | Aug 1993 |
| 28264 | T & P Oil & Gas, L.L.C. | Overland Park, KS 66212 | Oil Operator | Dec 2009 |
| 28265 | T & R Investments, Inc. | Borger, TX 79008 | Oil & Gas Operator | Nov 1995 |
| 28266 | T & R Oil | Mapleton, KS 66754 | Oil & Gas Operator | May 2018 |
| 28267 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 28268 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 28269 | T & T Compression Inc | Clymer, PA 15728-1014 | Gas Operator | Dec 2023 |
| 28270 | T & T Contracting Dba Hulman Contracting, LLC | Rockfield, KY 42274 | Oil & Gas Operator | Dec 2022 |
| 28271 | T & T Oil Co. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2002 |
| 28272 | T & T Production Co. | Victoria, TX 77902 | Oil & Gas Operator | Feb 1995 |
| 28273 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Sep 2024 |
| 28274 | T - C Oil Company | Refugio, TX 78377 | Oil & Gas Operator | Jan 2012 |
| 28275 | T And DS Lube Doctors LLC | Carlsbad, NM 88220 | Gas Operator | Sep 2024 |
| 28276 | T And L Oil Inc | Tonkawa, OK 74653-4530 | Oil & Gas Operator | Aug 2024 |
| 28277 | T B C Inc | Coweta, OK 74429 | Oil & Gas Operator | Apr 2020 |
| 28278 | T B Drilling Co | Moxahala, OH 43761 | Oil & Gas Operator | Dec 1998 |
| 28279 | T B K Energy Company | New Braunfels, TX 78130 | Oil & Gas Operator | Sep 2024 |
| 28280 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | Aug 2024 |
| 28281 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 28282 | T C M LLC | | Gas Operator | Jun 2009 |
| 28283 | T C Production | | Oil Operator | May 1994 |
| 28284 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 28285 | T Dozer D Oil Co. | Goree, TX 76363 | Oil & Gas Operator | Nov 2024 |
| 28286 | T E F Inc | Madill, OK 73446-6656 | Oil & Gas Operator | Jul 2023 |
| 28287 | T E L Oil & Gas Corporation | Guymon, OK 73941 | Gas Operator | Aug 2024 |
| 28288 | T G & S Oil | Marietta, OK 73448 | Oil & Gas Operator | Aug 2024 |
| 28289 | T I Energy Services Inc | | Oil & Gas Operator | Dec 2003 |
| 28290 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 28291 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 28292 | T JS Oil & Gas Inc | Fresno, OH 43824 | Oil & Gas Operator | Dec 2023 |
| 28293 | T L C Oil Inc | Seminole, OK 74868 | Oil & Gas Operator | Aug 2024 |
| 28294 | T M Hopkins Operating Co | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 28295 | T P Operating LLC | | Oil & Gas Operator | Nov 1999 |
| 28296 | T P Production Co | Denver, CO 80202 | Oil & Gas Operator | Nov 1996 |
| 28297 | T S B T Oil & Gas Properties | Moore, OK 73160-8126 | Oil & Gas Operator | Jan 2018 |
| 28298 | T T & T Inc | Shawnee, OK 74802-3694 | Oil & Gas Operator | Jan 1994 |
| 28299 | T W Clemons Operating Co., LLC | Minden, LA 71055 | Oil & Gas Operator | Nov 2024 |
| 28300 | T W Law LLC | Muskogee, OK 74403-6736 | Oil Operator | Aug 2024 |