| 3201 | Douglas, Norvel Trust | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Aug 2013 |
| 3202 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2025 |
| 3203 | Dove Creek Resources, LLC | Arlington, TX 76012 | Oil Operator | Apr 2025 |
| 3204 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 3205 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 3206 | Dowden, T. L. | Henderson, TX 75652 | Oil & Gas Operator | Apr 2025 |
| 3207 | Dowell Oil & Gas | Stephenville, TX 76401 | Oil & Gas Operator | Apr 2025 |
| 3208 | Down-Hole Pump Service Co., Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2025 |
| 3209 | Downing Well Service, Inc. | Devine, TX 78016 | Oil & Gas Operator | Apr 2025 |
| 3210 | Downman Jones Oil Operators, Inc | Brookshire, TX 77423 | Oil & Gas Operator | Jan 2007 |
| 3211 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 3212 | DP Well Works I, LLC | Salt Lake Cty, UT 84103 | Oil & Gas Operator | Apr 2025 |
| 3213 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2025 |
| 3214 | DPMP Energy LLC | Prosper, TX 75078 | Oil & Gas Operator | Dec 2023 |
| 3215 | Drachen Energy Co. | San Antonio, TX 78258 | Oil Operator | Apr 2025 |
| 3216 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2025 |
| 3217 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 3218 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 3219 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Apr 2025 |
| 3220 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 3221 | Drain Oil Co. | Fritch, TX 79036 | Oil & Gas Operator | Jul 2009 |
| 3222 | Drain Oil Co. LLC | Fritch, TX 79036 | Oil & Gas Operator | Apr 2025 |
| 3223 | Drake Oil & Gas, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 3224 | Drake Petroleum, LLC | Cypress, TX 77429 | Oil & Gas Operator | Jun 2023 |
| 3225 | Dreher, George R. | Midland, TX 79702 | Oil & Gas Operator | Jan 2018 |
| 3226 | Drennan Oil L.L.C. | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2025 |
| 3227 | Drennan, D. E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2011 |
| 3228 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 3229 | DRH Properties LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 3230 | Driftwood Energy Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2022 |
| 3231 | Drill Partners Management, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2010 |
| 3232 | Drillers Energy Search, Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 3233 | Drillmar Energy, Inc. | Houston, TX 77079 | Oil & Gas Operator | Nov 2014 |
| 3234 | Drillmar Operating Company | Houston, TX 77019 | Oil & Gas Operator | Jun 2013 |
| 3235 | Drillogix Exploration LLC | Breckenridge, TX 76424 | Oil Operator | Apr 2025 |
| 3236 | Drilmor, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 1998 |
| 3237 | Driscoll S.W.D. Inc. | San Antonio, TX 78229 | Oil & Gas Operator | Apr 2025 |
| 3238 | DRS Exploration Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 1999 |
| 3239 | Drum Oil & Gas, Inc. | Houston, TX 77082 | Oil & Gas Operator | Apr 2025 |
| 3240 | Drum, Delton | Liberty, TX 77575 | Oil & Gas Operator | Jul 2005 |
| 3241 | Dry Creek Operating, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2025 |
| 3242 | Dry Fork Production Co | Wichita Falls, TX 76301 | Oil Operator | Apr 2003 |
| 3243 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 3244 | DSB Energy, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2025 |
| 3245 | DSM Exploration Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | May 1996 |
| 3246 | DSR Oil & Gas, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 3247 | DSTJ Corporation | Montgomery, TX 77316 | Oil & Gas Operator | Mar 2001 |
| 3248 | DSW Production Corp. | Houston, TX 77265 | Oil & Gas Operator | Apr 2025 |
| 3249 | DSX Operating Co. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 2008 |
| 3250 | Dte Gas Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2007 |
| 3251 | Dte Gas Resources, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2014 |
| 3252 | Dual Production Partners, LLC | Nacogdoches, TX 75963 | Oil & Gas Operator | Apr 2025 |
| 3253 | Dual Quiver Oil & Gas Op, LLC | Flower Mound, TX 75027 | Oil & Gas Operator | Apr 2025 |
| 3254 | Ducky Oil Corporation | Fort Worth, TX 76120 | Oil & Gas Operator | Apr 2025 |
| 3255 | Duderstadt, A. R. | Boling, TX 77420 | Oil & Gas Operator | Apr 2025 |
| 3256 | Dudley Oil Co. | Crane, TX 79731 | Oil & Gas Operator | Jan 2006 |
| 3257 | Dugan Production Corp | Farmington, NM 87499 | Oil & Gas Operator | Feb 2025 |
| 3258 | Dugger, Glenn | Alice, TX 78332 | Oil & Gas Operator | Nov 2013 |
| 3259 | Duke Operating Company | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 3260 | Duke, M. L. | Snyder, TX 79549 | Oil & Gas Operator | Mar 2008 |
| 3261 | Duke, M.A. "Andy", Jr. | Montague, TX 76251 | Oil & Gas Operator | Jun 2023 |
| 3262 | Dula Production, LLC | Stockdale, TX 78160 | Oil Operator | Apr 2025 |
| 3263 | Dunbar, Ron, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2012 |
| 3264 | Duncan Drilling Co. | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2025 |
| 3265 | Duncan Energy Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2008 |
| 3266 | Duncan Energy LLC | Dallas, TX 75231 | Oil & Gas Operator | Apr 2025 |
| 3267 | Duncan Land & Exploration, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 3268 | Duncan Oil Company | Holliday, TX 76366 | Oil Operator | Mar 2008 |
| 3269 | Duncan Oil Inc | Denver, CO 80210 | Oil & Gas Operator | Jun 2016 |
| 3270 | Duncan Oil Properties, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 3271 | Dundee Oil & Supply Inc | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2001 |
| 3272 | Dundee Petroleum, Inc. | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 2003 |
| 3273 | Dune Oil And Gas, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Aug 2006 |
| 3274 | Dune Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 2016 |
| 3275 | Dune Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1997 |
| 3276 | Dunigan Operating Company, Inc. | Austin, TX 78755 | Oil & Gas Operator | Apr 2025 |
| 3277 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 3278 | Dunlap Exploration, Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2016 |
| 3279 | Dunlap, Rodge | Olney, TX 76374 | Oil & Gas Operator | Aug 2002 |
| 3280 | Dunn Resources, LLC | Shreveport, LA 71115 | Oil & Gas Operator | Mar 2023 |
| 3281 | Dunne Equities Operating, Inc. | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 3282 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 3283 | Duplantis Energy, LLC | Pleasanton, TX 78064 | Oil Operator | Apr 2025 |
| 3284 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |
| 3285 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | Apr 2025 |
| 3286 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 3287 | Durst Oil Company | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Sep 2000 |
| 3288 | Duster Production, Inc. | Refugio, TX 78377 | Oil & Gas Operator | Oct 2011 |
| 3289 | Duval Gas Gathering Corporation | Austin, TX 78711 | Oil & Gas Operator | Apr 2025 |
| 3290 | DWP Oil & Gas | Wichita Falls, TX 76309 | Oil & Gas Operator | Apr 2025 |
| 3291 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 3292 | Dyersdale Energy, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 3293 | Dyersdale Production Co, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 3294 | Dym Energy, Inc. | Celina, TX 75009 | Oil & Gas Operator | Apr 2018 |
| 3295 | Dynamic Of Texas, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Aug 2003 |
| 3296 | Dynamic Offshore Res. NS, LLC | Houston, TX 77010 | Oil & Gas Operator | May 2010 |
| 3297 | Dynamic Offshore Resources, LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 3298 | Dynamic Petroleum Res., Inc. | Houston, TX 77068 | Oil & Gas Operator | Jul 1994 |
| 3299 | Dynamic Production, Inc. | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2025 |
| 3300 | Dyne Oil & Gas,Inc. | Borger, TX 79008 | Oil & Gas Operator | Dec 2017 |