| 1201 | BKR Operating LLC | Ripley, OK 74062-6524 | Oil & Gas Operator | Jul 2025 |
| 1202 | BKV Barnett, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Dec 2025 |
| 1203 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Dec 2025 |
| 1204 | BKV Opr LLC | Tunkhannock, PA 18657 | Gas Operator | Sep 2025 |
| 1205 | BKV Ventures, LLC | | Oil & Gas Operator | Nov 2020 |
| 1206 | BL Production, LLC | Abilene, TX 79606 | Oil Operator | Dec 2025 |
| 1207 | Black & White Oper. | Thayer, KS 66776 | Oil Operator | Aug 1998 |
| 1208 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Dec 2025 |
| 1209 | Black Aubrey C | Dallas, TX 75206 | Oil & Gas Operator | Nov 2002 |
| 1210 | Black Badger Energy LLC. | | Oil Operator | Oct 2025 |
| 1211 | Black Bandana LLC | Santo, TX 76472 | Oil & Gas Operator | Dec 2025 |
| 1212 | Black Bank LLC | Billings, MT 59103 | Oil Operator | Sep 2025 |
| 1213 | Black Bayou Gas Processing, Inc. | | Oil Operator | Dec 2024 |
| 1214 | Black Bayou Gas Systems, Inc. | | Oil Operator | Feb 2009 |
| 1215 | Black Bayou Management Co Inc. | | Oil & Gas Operator | Aug 1980 |
| 1216 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 1217 | Black Bayou Petroleum | | Oil Operator | Jul 1999 |
| 1218 | Black Bayou Resources, Inc. | | Oil & Gas Operator | Jun 1992 |
| 1219 | Black Bear Midstream LLC | | Oil Operator | Jan 2025 |
| 1220 | Black Bear Oil Corporation | Las Vegas, NV 89128 | Oil & Gas Operator | Oct 2025 |
| 1221 | Black Bear Properties LLC | Oklahoma City, OK 73156-1904 | Oil & Gas Operator | Feb 2013 |
| 1222 | Black Belt Operating, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 1223 | Black Coal Resources Company | Fort Washakie, WY 82514 | Oil & Gas Operator | Dec 1991 |
| 1224 | Black Creek Exploration LLC | Healdton, OK 73438 | Oil & Gas Operator | Sep 2025 |
| 1225 | Black Creek Oil Company, LLC | Yancey, TX 78886 | Oil Operator | Dec 2025 |
| 1226 | Black Creek Production Co., Inc. | Driftwood, TX 78619 | Oil & Gas Operator | Feb 2000 |
| 1227 | Black Dahlia Oil & Gas Co. | Glendale, CA 91208 | Oil Operator | Jun 2025 |
| 1228 | Black Diamond Energy Inc | Pittsburgh, PA 15237 | Gas Operator | May 2016 |
| 1229 | Black Diamond Energy Of Delaware Inc | Buffalo, WY 82834 | Oil & Gas Operator | Oct 2025 |
| 1230 | Black Diamond Energy, LLC | | Oil & Gas Operator | Oct 2008 |
| 1231 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 1232 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 1233 | Black Diamond Operating Co., LLC | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2009 |
| 1234 | Black Diamond Production Co. | | Oil & Gas Operator | Mar 2021 |
| 1235 | Black Dome Energ | | Oil & Gas Operator | Dec 1996 |
| 1236 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 1237 | Black Dot Oil Inc | Skiatook, OK 74070 | Oil & Gas Operator | Aug 2025 |
| 1238 | Black Draw Energy LLC | Cypress, TX 77433 | Oil & Gas Operator | Dec 2025 |
| 1239 | Black Elk Energy Offshore Op LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2025 |
| 1240 | Black Elk Energy Offshore Operations LLC | | Oil & Gas Operator | Jun 2016 |
| 1241 | Black Energy LLC | Okmulgee, OK 74447 | Oil Operator | Aug 2025 |
| 1242 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 1243 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 1244 | Black Gold Oil Co Dba C & L Expl Co | St Louis, MO 63304 | Oil Operator | Dec 2022 |
| 1245 | Black Gold Oil Company | Duncan, OK 73533-1581 | Oil & Gas Operator | Oct 2025 |
| 1246 | Black Gold Operating Co, LLC | Plntersville, TX 77363 | Oil & Gas Operator | Dec 2025 |
| 1247 | Black Gold Petroleum, LLC | Alice, TX 78333 | Oil Operator | Dec 2025 |
| 1248 | Black Gold Prod Co., Inc. | | Oil & Gas Operator | Feb 1998 |
| 1249 | Black Gold Properties | Lubbock, TX 79424 | Oil & Gas Operator | Feb 1999 |
| 1250 | Black Gold Resources LLC | Houston, TX 77056 | Oil Operator | Sep 2013 |
| 1251 | Black Gold Services Inc | Casper, WY 82644 | Oil & Gas Operator | Oct 2025 |
| 1252 | Black Gold Well Service | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2025 |
| 1253 | Black Gold Well Service, Inc. | Towanda, KS 67144 | Oil Operator | Dec 2019 |
| 1254 | Black Hawk Petro | | Oil Operator | Dec 1993 |
| 1255 | Black Hawk Resources | | Oil & Gas Operator | Dec 1984 |
| 1256 | Black Hawk Resources Corporation | Denver, CO 80202 | Oil Operator | Mar 1986 |
| 1257 | Black Hawk Resources, LLC | Bowman, ND 58623 | Oil & Gas Operator | Jun 2011 |
| 1258 | Black Hills Exploration & Production Inc | Newcastle, WY 82701 | Oil & Gas Operator | Mar 2018 |
| 1259 | Black Hills Gas Resources, Inc. | Rapid City, SD 57702 | Oil & Gas Operator | Aug 2018 |
| 1260 | Black Hills Plateau Production LLC | | Gas Operator | Sep 2016 |
| 1261 | Black Horse Resources, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2024 |
| 1262 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | Sep 2025 |
| 1263 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Dec 2025 |
| 1264 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 1265 | Black Jewel Resources LTD Co | Berryville, AR 72616-0538 | Oil & Gas Operator | Dec 2014 |
| 1266 | Black Lava Operating LLC | | Oil & Gas Operator | Aug 2025 |
| 1267 | Black Mesa Energy LLC | Tulsa, OK 74103-4334 | Oil & Gas Operator | Aug 2025 |
| 1268 | Black Mountain Oil & Gas II LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2021 |
| 1269 | Black Mountain Oil Co. | | Oil & Gas Operator | Dec 1999 |
| 1270 | Black Mountain Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 1271 | Black Mountain Petroleum | Mogadore, OH 44260 | Oil & Gas Operator | Dec 2024 |
| 1272 | Black Mountain STX I LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 1273 | Black Mountain SWD LP | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 1274 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Jun 2025 |
| 1275 | Black Oil Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 1276 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 1277 | Black Pearl Operating Comp., LLC | Houston, TX 77057 | Oil Operator | Dec 2025 |
| 1278 | Black Petroleum | | Oil Operator | Sep 1989 |
| 1279 | Black Petroleum Company | Wichita, KS 67277 | Oil Operator | Jan 2004 |
| 1280 | Black Pool Energy, LP | Houston, TX 77070 | Oil & Gas Operator | Jul 2024 |
| 1281 | Black Resources | Borger, TX 79008 | Oil & Gas Operator | Dec 2025 |
| 1282 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 1283 | Black River Oil Corp And Golden Petroleum Corp | | Oil & Gas Operator | Dec 1989 |
| 1284 | Black River Operating LLC | Keller, TX 76248 | Oil & Gas Operator | Dec 2025 |
| 1285 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 1286 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 1287 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Dec 2025 |
| 1288 | Black Sheep Operating, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Dec 2025 |
| 1289 | Black Snake Petroleum, LLC | | Oil & Gas Operator | Sep 2025 |
| 1290 | Black Spot Oil Company, A General Partnership | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 1291 | Black Star Energy Inc | | Oil Operator | May 2004 |
| 1292 | Black Star Oil Company | Plano, TX 75094 | Oil & Gas Operator | Dec 2025 |
| 1293 | Black Star Petro | | Oil Operator | Jul 1995 |
| 1294 | Black Star Petroleum Corp. | Oceanside, NY 11572 | Oil Operator | Oct 1997 |
| 1295 | Black Stone Energy Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 1296 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 1297 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 1298 | Black Stone Petroleum LLC | Wichita, KS 67206 | Oil Operator | Jul 2019 |
| 1299 | Black Strata LLC | Weatherford, TX 76086 | Oil Operator | Dec 2025 |
| 1300 | Black Swan Opco, LLC | Edmond, OK 73013 | Oil & Gas Operator | Dec 2025 |