| 201 | J-W Operating Company | Christoval, TX 76935 | Oil & Gas Operator | Feb 2026 |
| 202 | Javernick Oil | | Oil Operator | Dec 2025 |
| 203 | Jenex Petroleum Corp | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2026 |
| 204 | Jetta Operating Company, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 205 | JFH Oil & Gas LLC | | Oil Operator | Oct 2022 |
| 206 | Joemar Wyoming Operating LLC | | Oil & Gas Operator | Nov 2025 |
| 207 | JWC Operating LLC | | Oil & Gas Operator | Nov 2025 |
| 208 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Dec 2025 |
| 209 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Feb 2026 |
| 210 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Oct 2025 |
| 211 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 212 | KGH Operating Company | Billings, MT 59115 | Oil & Gas Operator | Nov 2025 |
| 213 | Kinder Morgan Co2 Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 214 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 215 | Kodiak Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Sep 2025 |
| 216 | KT Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 217 | KTM Operating LLC | | Oil & Gas Operator | Nov 2025 |
| 218 | Kuenzler & Flora Reserve Company | | Oil & Gas Operator | Aug 2025 |
| 219 | Kugler* Dean & Joe Dba D-J Oil Company | | Oil & Gas Operator | Sep 2019 |
| 220 | Lamar Oil & Gas Exploration | | Gas Operator | Oct 2013 |
| 221 | Laramie Energy LLC | | Oil & Gas Operator | Aug 2013 |
| 222 | Lasso Oil & Gas LLC | | Oil & Gas Operator | Jul 2022 |
| 223 | LB Exploration, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Sep 2025 |
| 224 | Legado DJ, LLC | | Oil & Gas Operator | Jul 2011 |
| 225 | Lilis Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Aug 2017 |
| 226 | Linn Bros Oil & Gas Inc | Fruita, CO 81521 | Oil & Gas Operator | Jan 2026 |
| 227 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Feb 2026 |
| 228 | Loeb LLC* Herman L | | Oil & Gas Operator | Dec 2025 |
| 229 | Logos Operating, LLC | Farmington, NM 87401 | Oil & Gas Operator | Dec 2025 |
| 230 | Loloff Construction Inc | | Oil & Gas Operator | Apr 2016 |
| 231 | Lone Mountain Production Company | | Oil & Gas Operator | Jan 2016 |
| 232 | Longs Peak Resources LLC | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 233 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Nov 2025 |
| 234 | Lundvall Oil & Gas Inc | | Oil & Gas Operator | Jan 2023 |
| 235 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 236 | M E III Corporation | | Oil & Gas Operator | Apr 2022 |
| 237 | Machii-Ross Petroleum Co | | Oil & Gas Operator | Apr 2014 |
| 238 | Magpie Operating, Inc | | Oil & Gas Operator | Nov 2025 |
| 239 | Mallon Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 240 | Maralex Resources Inc | Ignacio, CO 81137 | Oil & Gas Operator | Dec 2025 |
| 241 | Markus Production, Inc | | Oil & Gas Operator | Mar 2021 |
| 242 | Markwest Resources Inc | Englewood, CO 801125004 | Oil & Gas Operator | Jun 2003 |
| 243 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 244 | Matrix Oil Corporation | | Oil & Gas Operator | Dec 2025 |
| 245 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Dec 2025 |
| 246 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Dec 2025 |
| 247 | McClane Energy Inc | | Oil & Gas Operator | Aug 2017 |
| 248 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Dec 2025 |
| 249 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 250 | McLane Trust* Dixie | | Gas Operator | Oct 2025 |
| 251 | McWhinney Holding Company LLLP | | Oil & Gas Operator | Mar 2021 |
| 252 | MDS Energy Development LLC | | Oil & Gas Operator | Dec 2025 |
| 253 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 254 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 255 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Dec 2025 |
| 256 | Mescko Operating & Prod | Seville, OH 44273 | Oil & Gas Operator | Dec 2025 |
| 257 | Messer LLC | | Gas Operator | Dec 2025 |
| 258 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 259 | Monago Operating Inc | | Oil & Gas Operator | Apr 2007 |
| 260 | Monahan* Rex Family Trust | | Oil & Gas Operator | May 2007 |
| 261 | Mont Rouge Inc | | Gas Operator | Feb 2020 |
| 262 | Monument Gas Marketing Inc | | Oil & Gas Operator | Dec 2025 |
| 263 | Monument Global Resources Inc | Dallas, TX 75243 | Oil & Gas Operator | Jan 2025 |
| 264 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 265 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Apr 2013 |
| 266 | Mull Drilling Company | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 267 | Murchison Oil & Gas Inc | Plano, TX 75024 | Oil & Gas Operator | Aug 2020 |
| 268 | Murfin Drilling Company, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 269 | Mustang Resources LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2025 |
| 270 | Mystique Resources Company | Aurora, CO 80016 | Oil & Gas Operator | Feb 2023 |
| 271 | Nanke Energy LLC | Westminster, CO 80234 | Oil & Gas Operator | Oct 2025 |
| 272 | National Fuel Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Dec 2025 |
| 273 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 274 | Newell Energy LTD | | Gas Operator | Nov 2021 |
| 275 | Nielson & Associates, Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 276 | Nighthawk Production LLC | | Oil & Gas Operator | May 2016 |
| 277 | Niobrara Illuminating Gas Associates LLC | | Oil & Gas Operator | Jul 2007 |
| 278 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2026 |
| 279 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Feb 2026 |
| 280 | Nonsuch Natural Gas Inc | Naples, FL 34108 | Oil & Gas Operator | Jan 2026 |
| 281 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Sep 2025 |
| 282 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 283 | North Shore Exploration & Prod LLC | Broomfield, CO 80021 | Oil & Gas Operator | Dec 2025 |
| 284 | Northstar Gas Company, Inc. | | Oil & Gas Operator | Jan 2016 |
| 285 | Nuevida Resources, LLC | Dallas, TX 75235 | Gas Operator | Nov 2025 |
| 286 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Feb 2026 |
| 287 | Ogris Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 288 | Okt Resources, LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 289 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 290 | Organic Energy Company LLC | | Oil & Gas Operator | Jan 2026 |
| 291 | Orion Energy Partners LP | Denver, CO 80202 | Oil & Gas Operator | Nov 2010 |
| 292 | Overland Resources LLC | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Feb 2019 |
| 293 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 294 | Oxbow Properties Inc | Centennial, CO 80122-1422 | Oil & Gas Operator | Jan 2025 |
| 295 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 296 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 297 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 298 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 299 | Padco LLC | | Oil & Gas Operator | Mar 2023 |
| 300 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |