| 8201 | Double "K" Oil, Inc. | Ellis, KS 67637 | Oil Operator | Dec 2019 |
| 8202 | Double 'B' Oil Co | | Oil Operator | Nov 2009 |
| 8203 | Double 'B' Oil I | | Oil Operator | Feb 1992 |
| 8204 | Double 'E' Oil-B | | Oil Operator | Mar 1989 |
| 8205 | Double Aa Oil, L.L.C. | | Oil Operator | Aug 2023 |
| 8206 | Double Aa S LLC | Mayport, PA 16240-5638 | Oil & Gas Operator | Dec 2019 |
| 8207 | Double Barrel Oil Co. | | Oil Operator | Dec 1978 |
| 8208 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | May 2026 |
| 8209 | Double Barrel Operating Limited Liability Company | Wichita Falls, TX 76308 | Oil Operator | May 2026 |
| 8210 | Double C Oil & Gas LLC | Jenks, OK 74037-6946 | Oil Operator | Dec 2025 |
| 8211 | Double C Operating LLC | Abilene, TX 79602 | Oil Operator | May 2026 |
| 8212 | Double D Oil Co | Winfield, KS 67156 | Oil Operator | Dec 2025 |
| 8213 | Double D Producers, Inc | Edmonton, KY 42129 | Oil Operator | Dec 2024 |
| 8214 | Double D'S LLC | Hays, KS 67601 | Oil Operator | Nov 2025 |
| 8215 | Double Diamond Energy Corp. | Granbury, TX 76048 | Gas Operator | Apr 2013 |
| 8216 | Double Diamond Petroleum, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | May 2026 |
| 8217 | Double E Oil & Gas, L. P. | Electra, TX 76360 | Oil & Gas Operator | May 2026 |
| 8218 | Double Eagle Exp | | Oil Operator | Jul 1992 |
| 8219 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Dec 2025 |
| 8220 | Double Eagle Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Jan 2000 |
| 8221 | Double Eagle Oil Co. | Marshall, TX 75670 | Oil & Gas Operator | Jan 2002 |
| 8222 | Double Eagle Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2026 |
| 8223 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | May 2026 |
| 8224 | Double Eagle Resources, LLC | FT Smith, AR 72901 | Oil & Gas Operator | Sep 2009 |
| 8225 | Double Eight Oil Company LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2026 |
| 8226 | Double F Oil Co. | | Oil Operator | Jun 2009 |
| 8227 | Double G Oil LLC | | Oil Operator | Feb 2026 |
| 8228 | Double G Petro LLC | | Oil Operator | Dec 2025 |
| 8229 | Double H Petroleum Corporation | Tulsa, OK 74136-5414 | Oil & Gas Operator | May 2006 |
| 8230 | Double J Enterprises | Loving, TX 76460 | Oil Operator | May 2026 |
| 8231 | Double J Oil Co LLC | Bristow, OK 74010 | Oil & Gas Operator | Feb 2026 |
| 8232 | Double J Operating Company, Inc. | San Antonio, TX 78205 | Oil Operator | Jan 2008 |
| 8233 | Double J Resources Inc | Bradford, PA 16701-6506 | Oil & Gas Operator | Dec 2022 |
| 8234 | Double K Production | Graham, TX 76450 | Oil & Gas Operator | Sep 2014 |
| 8235 | Double L Contractors, LLC | Carthage, TX 75633 | Oil Operator | May 2026 |
| 8236 | Double L Drilling | Yates Center, KS 66783 | Oil Operator | Jun 2000 |
| 8237 | Double L Oil Producers | | Oil Operator | Dec 2019 |
| 8238 | Double L Operating | Graham, TX 76450 | Oil & Gas Operator | Nov 2018 |
| 8239 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | May 2026 |
| 8240 | Double Play Oil & Gas | Portland, TX 78374 | Oil & Gas Operator | Dec 2001 |
| 8241 | Double Play Oil & Gas, Inc | Portland, TX 78374 | Oil & Gas Operator | May 2026 |
| 8242 | Double R Oil Co. | Charlotte, TX 78011 | Oil & Gas Operator | May 2010 |
| 8243 | Double R Petroleum | | Oil & Gas Operator | Sep 2004 |
| 8244 | Double S Liberty Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | May 2026 |
| 8245 | Double S Operating Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 8246 | Double T Energy LLC | Lenorah, TX 79749 | Oil Operator | May 2026 |
| 8247 | Double Ten Petro | | Oil Operator | Jul 1994 |
| 8248 | Double U Oil Co. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1996 |
| 8249 | Double U Oil Co., LTD. | San Antonio, TX 78217 | Oil & Gas Operator | May 2000 |
| 8250 | Doudna, Mark A. | Osawatomie, KS 66064 | Oil Operator | Nov 2009 |
| 8251 | Doug And Janene Risenhoover Oil And Gas LLC | Cushing, OK 74023 | Oil Operator | Feb 2026 |
| 8252 | Doug'S Pumping Service | | Oil Operator | Nov 2025 |
| 8253 | Dougherty Properties | Beeville, TX 78104 | Oil & Gas Operator | Jun 1997 |
| 8254 | Dougherty, H W | Petaluma, CA 94954 | Gas Operator | Oct 2019 |
| 8255 | Doughtie Operating Company, LLC | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2023 |
| 8256 | Douglas Edwards | | Oil Operator | Nov 1993 |
| 8257 | Douglas Fairbanks Holdings LLC | Pine Hurst, TX 77362-9998 | Oil & Gas Operator | Feb 2026 |
| 8258 | Douglas Investments Inc | Fort Worth, TX 76137 | Oil Operator | Jan 2020 |
| 8259 | Douglas Oil & Gas Co Inc | Ada, OK 74820 | Oil Operator | Apr 2014 |
| 8260 | Douglas Oil & Gas Inc | Canonsburg, PA 15317 | Gas Operator | Dec 2003 |
| 8261 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 8262 | Douglas Petroleum Inc. | Spring, TX 77379 | Oil & Gas Operator | Nov 2010 |
| 8263 | Douglas W. Baker Trustee | | Oil & Gas Operator | Dec 1993 |
| 8264 | Douglas Whitney | | Oil Operator | Dec 2004 |
| 8265 | Douglas, Norvel Trust | Hot Springs V, AR 71909 | Oil & Gas Operator | Aug 2013 |
| 8266 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 8267 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | May 2026 |
| 8268 | Dove Creek Resources, LLC | Arlington, TX 76012 | Oil Operator | May 2026 |
| 8269 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 8270 | Dove Investments LLC | Wetumka, OK 74883 | Oil Operator | Aug 2025 |
| 8271 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 8272 | Dover Atwood Corp. | Massillon, OH 44646 | Oil & Gas Operator | Dec 2025 |
| 8273 | Dover Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 8274 | Dow Chemical Co. | | Oil & Gas Operator | Dec 1997 |
| 8275 | Dow Intrastate Gas Company | | Oil Operator | Dec 2023 |
| 8276 | Dow Mineral & Royalty Co, Inc | | Oil & Gas Operator | Jun 1994 |
| 8277 | Dowd, Gene | | Oil & Gas Operator | Dec 2013 |
| 8278 | Dowden, T. L. | Henderson, TX 75652 | Oil & Gas Operator | May 2026 |
| 8279 | Dowell Oil & Gas | Stephenville, TX 76401 | Oil & Gas Operator | May 2026 |
| 8280 | Down-Hole Pump Service Co., Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | May 2026 |
| 8281 | Downhole Oil & Gas Tech LLC | Countyline, OK 73152-0027 | Oil Operator | Oct 2009 |
| 8282 | Downing Well Service, Inc. | Devine, TX 78016 | Oil & Gas Operator | May 2026 |
| 8283 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Dec 2025 |
| 8284 | Downman Jones Oil Operators, Inc | Brookshire, TX 77423 | Oil & Gas Operator | Jan 2007 |
| 8285 | Doyle Dempsey | | Oil Operator | May 1997 |
| 8286 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 8287 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 8288 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Aug 2024 |
| 8289 | DP Well Works I, LLC | Salt Lake Cty, UT 84103 | Oil & Gas Operator | May 2026 |
| 8290 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | May 2026 |
| 8291 | DPMP Energy LLC | Prosper, TX 75078 | Oil & Gas Operator | Dec 2023 |
| 8292 | DR Well Operator | | Oil Operator | Jan 1990 |
| 8293 | DR. Richard C. Baker | | Oil & Gas Operator | Sep 2009 |
| 8294 | Drachen Energy Co. | San Antonio, TX 78258 | Oil Operator | May 2026 |
| 8295 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | May 2026 |
| 8296 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 8297 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 8298 | Dragon Energy Corporation | | Oil & Gas Operator | Oct 2006 |
| 8299 | Dragon Energy LLC | Tulsa, OK 74135-7234 | Oil & Gas Operator | Feb 2015 |
| 8300 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | May 2026 |