| 201 | Intrepid Energy Corporation | Independence, KS 67301 | Oil Operator | Mar 2016 |
| 202 | Intrepid Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2021 |
| 203 | Intrepid Operating LTD., Co | Hobbs, NM 88241 | Oil & Gas Operator | Nov 2009 |
| 204 | Investco Oil And Gas Inc | | Oil & Gas Operator | Jan 2025 |
| 205 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2026 |
| 206 | Investment Land Services Inc | | Oil Operator | Oct 2001 |
| 207 | Investment Operating Co | Stillwater, OK 74075-8572 | Oil Operator | Feb 2026 |
| 208 | Investment Trends Corp. | | Gas Operator | Mar 1988 |
| 209 | Investors Drilli | | Gas Operator | Jan 1993 |
| 210 | Investors Oil, Inc. | | Oil Operator | Mar 1985 |
| 211 | Investors Resources Corp | Edmond, OK 73034 | Oil & Gas Operator | Mar 2026 |
| 212 | Invitation Energy, Incorporated | | Oil & Gas Operator | Dec 2021 |
| 213 | Invito Operating, LLC | McKinney, TX 75070 | Oil & Gas Operator | Apr 2026 |
| 214 | Invoil, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jun 2026 |
| 215 | Iochem Corporation | Oklahoma City, OK 73118-7483 | Oil & Gas Operator | Apr 2026 |
| 216 | Ioe Acres V LLC | Perry, NY 14530 | Gas Operator | Dec 2024 |
| 217 | Iowa Production Company, Inc. | | Oil & Gas Operator | Jan 1992 |
| 218 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 219 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Jun 2026 |
| 220 | Ipas Oil Company LLC | Pratt, KS 67124 | Oil Operator | Dec 2019 |
| 221 | Ipr Energy Partners, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Aug 2014 |
| 222 | Ipr Energy Partners, LLC | Bowie, TX 76230 | Oil & Gas Operator | Jun 2026 |
| 223 | Ipr USA Corp. | Irving, TX 75039 | Oil & Gas Operator | Jun 2009 |
| 224 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Jun 2026 |
| 225 | Ira Oil & Gas LLC | Addison, TX 75001 | Oil & Gas Operator | Jul 2008 |
| 226 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | Mar 2024 |
| 227 | Ira Testers, LLC | Ira, TX 79527 | Oil Operator | Jun 2026 |
| 228 | Irani Engineering | | Gas Operator | Dec 1995 |
| 229 | Irene L. Heary Irrevocable Trust | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 230 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 231 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 232 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | Jun 2026 |
| 233 | Irish Oil & Gas Co. | Houston, TX 77242 | Oil & Gas Operator | Aug 2003 |
| 234 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Jun 2026 |
| 235 | Iron City Wells LLC | Saxonburg, PA 16056-8802 | Gas Operator | Mar 2026 |
| 236 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2026 |
| 237 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 238 | Iron Oil Operating, LLC | | Oil & Gas Operator | Apr 2026 |
| 239 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2026 |
| 240 | Iron Pennsylvania Land LLC | Waynesburg, PA 15370 | Gas Operator | Dec 2025 |
| 241 | Iron Post Oil & Gas Co Inc | Bristow, OK 74010-4120 | Oil & Gas Operator | Mar 2026 |
| 242 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Jun 2026 |
| 243 | Iron Sights Operating, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2022 |
| 244 | Iron Springs Operating Co. Inc | | Oil & Gas Operator | Jan 2025 |
| 245 | Iron Star Energy LLC | Houston, TX 77037-1142 | Oil & Gas Operator | Apr 2026 |
| 246 | Ironbloom Operating, LLC | La Grange, TX 78945 | Oil & Gas Operator | Jun 2026 |
| 247 | Ironhead Oil & Gas LLC | Healdton, OK 73438 | Gas Operator | Mar 2026 |
| 248 | Ironhorse Operations, LLC | Kilgore, TX 75663 | Oil Operator | Jun 2026 |
| 249 | Ironroc Energy | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2026 |
| 250 | Ironwood Exploration Inc | | Oil & Gas Operator | Mar 1995 |
| 251 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 252 | Iroquois Central School District | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 253 | Irvin Drilling Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1990 |
| 254 | Irvin Operations, Inc. | | Oil Operator | Aug 1996 |
| 255 | Irvin Petroleum | Stinnett, TX 79083 | Oil & Gas Operator | Sep 1996 |
| 256 | Irvin Petroleum Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2016 |
| 257 | Irwin H. Parnes | | Oil Operator | Jun 1982 |
| 258 | Irwin-Crum | Nocona, TX 76255 | Oil Operator | Jun 2026 |
| 259 | Isaacs Billy J/Juanda R Living Trust | Konawa, OK 74849-6021 | Oil Operator | Mar 2026 |
| 260 | Isaacs Fairy J | Konawa, OK 74849-0134 | Oil Operator | Sep 2020 |
| 261 | Isaacs Scott J Jr | Butler, PA 16002-0059 | Gas Operator | Mar 2026 |
| 262 | Isaacson Energy Resources, LLC | Austin, TX 78741 | Oil & Gas Operator | Jun 2026 |
| 263 | Isaia, Deborah | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 264 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 265 | Isbrandtsen Oil And Gas Co | | Oil Operator | Mar 2002 |
| 266 | Isern, James R. | Wichita, KS 67277 | Oil Operator | Apr 1996 |
| 267 | Isis Operating Inc | Russell, KS 67665 | Oil Operator | Dec 2019 |
| 268 | Iskandia Energy Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 269 | Island Energy Partners LLC | | Gas Operator | Jan 2018 |
| 270 | Island Exploration | Houston, TX 77058 | Oil & Gas Operator | Jun 2026 |
| 271 | Isom Energy, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | May 2018 |
| 272 | Ison, Samuel M | Isonville, KY 41149 | Oil Operator | Dec 2024 |
| 273 | It'LL Do Oil Company | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 274 | Italian-American Oil Co., Inc. | Tomball, TX 77377 | Oil & Gas Operator | Jun 2026 |
| 275 | Itawamba Industrial Gas Co | | Gas Operator | Dec 1999 |
| 276 | Itech Oil Company | Cypress, TX 77429 | Oil & Gas Operator | Aug 2007 |
| 277 | Itr Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 278 | Itx Corporation | Dallas, TX 75225 | Oil & Gas Operator | Jun 2026 |
| 279 | Itx Pipeline Company, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jun 2026 |
| 280 | Iuka-Carmi Development LLC | Pratt, KS 67124 | Oil & Gas Operator | Feb 2026 |
| 281 | Iv L.C. | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2026 |
| 282 | Iv Standard, LLC | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2026 |
| 283 | Iva Oil | Cisco, TX 76437 | Oil & Gas Operator | Jun 2026 |
| 284 | Ivan Holt Well Servicing Inc | Edmond, OK 73003 | Oil Operator | Aug 1999 |
| 285 | Ivansons Oil Production | | Oil Operator | Dec 2025 |
| 286 | Ivett, Donald L. & Jeanette V. | Forestville, NY 14062 | Gas Operator | Dec 2024 |
| 287 | Ivory Energy, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2026 |
| 288 | Iwr Operating, LLC | Dallas, TX 75248 | Oil Operator | Jun 2026 |
| 289 | Iwt Energy Partners LLC | Northglenn, CO 80233 | Oil Operator | Jun 2026 |