| 1201 | Black Diamond Production Co. | | Oil & Gas Operator | Mar 2021 |
| 1202 | Black Dome Energ | | Oil & Gas Operator | Dec 1996 |
| 1203 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 1204 | Black Dot Oil Inc | Skiatook, OK 74070 | Oil & Gas Operator | May 2026 |
| 1205 | Black Draw Energy LLC | Cypress, TX 77433 | Oil & Gas Operator | Sep 2026 |
| 1206 | Black Elk Energy Offshore Op LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 1207 | Black Elk Energy Offshore Operations LLC | | Oil & Gas Operator | Jun 2016 |
| 1208 | Black Energy LLC | Okmulgee, OK 74447 | Oil Operator | May 2026 |
| 1209 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 1210 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 1211 | Black Gold Oil Co Dba C & L Expl Co | St Louis, MO 63304 | Oil Operator | Dec 2023 |
| 1212 | Black Gold Oil Company | Duncan, OK 73533-1581 | Oil & Gas Operator | Jul 2026 |
| 1213 | Black Gold Operating Co, LLC | Plntersville, TX 77363 | Oil & Gas Operator | Sep 2026 |
| 1214 | Black Gold Petroleum, LLC | Alice, TX 78333 | Oil Operator | Sep 2026 |
| 1215 | Black Gold Prod Co., Inc. | | Oil & Gas Operator | Feb 1998 |
| 1216 | Black Gold Properties | Lubbock, TX 79424 | Oil & Gas Operator | Feb 1999 |
| 1217 | Black Gold Resources LLC | Houston, TX 77056 | Oil Operator | Sep 2013 |
| 1218 | Black Gold Services Inc | Casper, WY 82644 | Oil & Gas Operator | Jun 2026 |
| 1219 | Black Gold Well Service | San Angelo, TX 76901 | Oil & Gas Operator | Sep 2026 |
| 1220 | Black Gold Well Service, Inc. | Towanda, KS 67144 | Oil Operator | Dec 2019 |
| 1221 | Black Hawk Petro | | Oil Operator | Dec 1993 |
| 1222 | Black Hawk Resources | | Oil & Gas Operator | Dec 1984 |
| 1223 | Black Hawk Resources Corporation | Denver, CO 80202 | Oil Operator | Mar 1986 |
| 1224 | Black Hawk Resources, LLC | Bowman, ND 58623 | Oil & Gas Operator | Jun 2011 |
| 1225 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2018 |
| 1226 | Black Hills Gas Resources, Inc. | Rapid City, SD 57702 | Oil & Gas Operator | Aug 2018 |
| 1227 | Black Hills Plateau Production LLC | | Gas Operator | Sep 2016 |
| 1228 | Black Hills Wyoming Gas LLC | Rapid City, SD 57709 | Gas Operator | Jul 2026 |
| 1229 | Black Horse Resources, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2024 |
| 1230 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | May 2026 |
| 1231 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Sep 2026 |
| 1232 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 1233 | Black Jewel Resources LTD Co | Berryville, AR 72616-0538 | Oil & Gas Operator | Dec 2014 |
| 1234 | Black Lava Operating LLC | | Oil & Gas Operator | May 2026 |
| 1235 | Black Mesa Energy LLC | Tulsa, OK 74103-4334 | Oil & Gas Operator | May 2026 |
| 1236 | Black Mountain Oil & Gas II LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2021 |
| 1237 | Black Mountain Oil Co. | | Oil & Gas Operator | Dec 1999 |
| 1238 | Black Mountain Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 1239 | Black Mountain Petroleum | Mogadore, OH 44260 | Oil & Gas Operator | Dec 2025 |
| 1240 | Black Mountain STX I LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 1241 | Black Mountain SWD LP | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 1242 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Apr 2026 |
| 1243 | Black Oak Operating LLC | Conroe, TX 77384 | Oil & Gas Operator | Sep 2026 |
| 1244 | Black Oil Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 1245 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 1246 | Black Pearl Operating Comp., LLC | Houston, TX 77057 | Oil Operator | Sep 2026 |
| 1247 | Black Petroleum | | Oil Operator | Sep 1989 |
| 1248 | Black Petroleum Company | Wichita, KS 67277 | Oil Operator | Jan 2004 |
| 1249 | Black Pool Energy, LP | Houston, TX 77070 | Oil & Gas Operator | Jul 2024 |
| 1250 | Black Resources | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 1251 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 1252 | Black River Oil Corp And Golden Petroleum Corp | | Oil & Gas Operator | Dec 1989 |
| 1253 | Black River Operating LLC | Keller, TX 76248 | Oil & Gas Operator | Sep 2026 |
| 1254 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Apr 2026 |
| 1255 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 1256 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Sep 2026 |
| 1257 | Black Sheep Operating, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Sep 2026 |
| 1258 | Black Snake Petroleum, LLC | | Oil & Gas Operator | Jun 2026 |
| 1259 | Black Spot Oil Company, A General Partnership | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 1260 | Black Star Energy Inc | | Oil Operator | May 2004 |
| 1261 | Black Star Oil Company | Plano, TX 75094 | Oil & Gas Operator | Sep 2026 |
| 1262 | Black Star Petro | | Oil Operator | Jul 1995 |
| 1263 | Black Star Petroleum Corp. | Oceanside, NY 11572 | Oil Operator | Oct 1997 |
| 1264 | Black Stone Energy Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 1265 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 1266 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 1267 | Black Stone Petroleum LLC | Wichita, KS 67206 | Oil Operator | Jul 2019 |
| 1268 | Black Strata LLC | Weatherford, TX 76086 | Oil Operator | Sep 2026 |
| 1269 | Black Swan Opco, LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2026 |
| 1270 | Black Swan Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 1271 | Black Tea Oil, LLC | Wichita, KS 67206 | Oil Operator | Apr 2026 |
| 1272 | Black Thunder Oil LLC | Gillette, WY 82717 | Oil & Gas Operator | Apr 2026 |
| 1273 | Black Top Operating, LLC | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 1274 | Black Velvet Petro. Co. | | Oil & Gas Operator | Dec 2007 |
| 1275 | Black W K Produc | | Oil & Gas Operator | Aug 1991 |
| 1276 | Black Warrior Methane Corp. | | Gas Operator | Jun 2026 |
| 1277 | Black Water Environmental L.L.C. | Texas City, TX 77590 | Oil Operator | Sep 2026 |
| 1278 | Black Wendell D | Atwood, OK 74827-9706 | Oil & Gas Operator | Jan 2009 |
| 1279 | Black'S Oil & Gas | Borger, TX 79008 | Oil & Gas Operator | Sep 2026 |
| 1280 | Black, Frank J., Oil Operations, Inc. | Overland Park, KS 66213 | Oil & Gas Operator | Dec 2009 |
| 1281 | Black, Karl T. | Paradise, TX 76073 | Oil & Gas Operator | Aug 2003 |
| 1282 | Black-Travis, Inc. | Paola, KS 66071 | Oil Operator | Apr 2026 |
| 1283 | Blackbeard Operating East LLC | Midland, TX 79701-4532 | Oil & Gas Operator | Dec 2020 |
| 1284 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2026 |
| 1285 | Blackberry Oil Company | Jennings, OK 74038-0068 | Oil & Gas Operator | Dec 2002 |
| 1286 | Blackbird Company | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 1287 | Blackbird Oil Co. | Great Bend, KS 67530 | Oil Operator | Feb 1996 |
| 1288 | Blackbird R 22 Og L.L.C. | Eastland, TX 76448 | Gas Operator | Sep 2026 |
| 1289 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 1290 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2026 |
| 1291 | Blackburn Oil & Gas, Inc. | Kinsley, KS 67547 | Oil & Gas Operator | Sep 2004 |
| 1292 | Blackburn Operating Co., Inc. | | Oil & Gas Operator | Jun 2008 |
| 1293 | Blackcat Oil Company | Glencoe, OK 74032 | Oil & Gas Operator | Jun 2026 |
| 1294 | Blackfire Operating LLC | Oklahoma City, OK 73116-4223 | Oil & Gas Operator | Jun 2026 |
| 1295 | Blackflat Oil Company LLC | Lubbock, TX 79424 | Oil Operator | Sep 2026 |
| 1296 | Blackhawk Energy | | Oil Operator | Dec 1993 |
| 1297 | Blackhawk Energy LLC | Greenville, KY 42345 | Oil & Gas Operator | Dec 2024 |
| 1298 | Blackhawk Explor | | Oil Operator | Jan 1990 |
| 1299 | Blackhawk Exploration, Inc. | Wichita, KS 67214 | Oil & Gas Operator | May 2020 |
| 1300 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |