| 301 | Newcastle Resources, LLC | Tyler, TX 75711 | Oil & Gas Operator | Aug 2015 |
| 302 | Newco Oil And Gas, LLC | McKinney, TX 75070 | Oil Operator | Jun 2025 |
| 303 | Newco, Inc. | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 304 | Newell Energy LTD | | Gas Operator | Oct 2021 |
| 305 | Newell Oil And Gas LLC | Shawnee, OK 74801-5783 | Oil & Gas Operator | Feb 2025 |
| 306 | Newfield Expl. Mid-Con. Inc | Tulsa, OK 74172 | Oil & Gas Operator | Jan 2015 |
| 307 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 308 | Newfield Exploration Mid-Continent Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2011 |
| 309 | Newfield Production Company | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jul 2022 |
| 310 | Newgulf Petroleum, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2017 |
| 311 | Newhaven Operating Inc | | Oil & Gas Operator | Dec 1998 |
| 312 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 313 | Newland Farm | Freedom, NY 14065 | Gas Operator | Dec 2023 |
| 314 | Newland Oil Comp | | Oil Operator | Sep 1996 |
| 315 | Newman & Scott | Duncan, OK 73534 | Oil & Gas Operator | Mar 2024 |
| 316 | Newman Bros Drilling | | Oil & Gas Operator | Apr 2004 |
| 317 | Newman Corporation | Harleton, TX 75651 | Oil & Gas Operator | Aug 2024 |
| 318 | Newman Cubed, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Jun 2025 |
| 319 | Newman Operating Company | Freer, TX 78357 | Oil & Gas Operator | Jun 2021 |
| 320 | Newman, John A. | Joplin, MO 64804 | Oil & Gas Operator | Jan 2001 |
| 321 | Newmo Company | | Oil & Gas Operator | Dec 2001 |
| 322 | Newmont Oil Company | Houston, TX 77002 | Oil & Gas Operator | Sep 1988 |
| 323 | Newpark Drilling Fluids LLC | Clinton, OK 73601 | Oil Operator | Dec 2013 |
| 324 | Newpark Environmental SVCS LLC | Lafayette, LA 70506 | Oil Operator | Jul 2014 |
| 325 | Newpek, LLC | Irving, TX 75039 | Oil & Gas Operator | Sep 2016 |
| 326 | Newport Gas Partners LLC | Gillette, WY 82716 | Oil & Gas Operator | May 2025 |
| 327 | Newport Oil Corporation | Clearwater, FL 33755 | Oil & Gas Operator | Jul 2011 |
| 328 | Newport Operating, LLC | Burkburnett, TX 76354 | Oil Operator | Jun 2025 |
| 329 | Newport Operators, LLC | | Oil & Gas Operator | Jan 2019 |
| 330 | Newstar Energy Of Texas L.L.C. | East Lansing, MI 48826 | Oil & Gas Operator | Mar 2008 |
| 331 | Newstar Energy USA Inc | Thornville, OH 43076 | Oil & Gas Operator | Aug 2004 |
| 332 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | Jun 2025 |
| 333 | Newton Steve Drilling | Worland, WY 82401 | Oil Operator | Apr 2001 |
| 334 | Newton Well Service | New Braunfels, TX 78132 | Oil & Gas Operator | May 2016 |
| 335 | Newton, Richard R. | Wichita Falls, TX 76309 | Oil & Gas Operator | Nov 1996 |
| 336 | Newton, W. F. | Conroe, TX 77305 | Oil & Gas Operator | Jun 1994 |
| 337 | Newton, W. F. Estate Of | Conroe, TX 77305 | Oil & Gas Operator | Jan 2000 |
| 338 | Newturn Oil Company | Houston, TX 77208 | Oil & Gas Operator | Jan 2004 |
| 339 | Newwoods Petroleum LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2016 |
| 340 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 341 | Nexen Oil And Gas U.S.A. Inc. | Calgary, AB T2P 5C1 | Oil & Gas Operator | Feb 2010 |
| 342 | Nexen Petroleum U.S.A. Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2012 |
| 343 | Nexstreem Corporation | | Oil & Gas Operator | Dec 2020 |
| 344 | Nextraction Energy Us Inc | Las Vegas, NV 89169 | Oil & Gas Operator | Feb 2018 |
| 345 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 346 | Ney Oil Operations | | Oil Operator | Apr 1998 |
| 347 | Neyer Oil Inc | | Oil & Gas Operator | Nov 1997 |
| 348 | Neyman, Robert L. & Maureen J. | Batavia, NY 14020 | Gas Operator | Dec 2023 |
| 349 | Neymeiyer John Oil Co | | Oil Operator | Dec 1998 |
| 350 | NFC Petroleum Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1996 |
| 351 | Nfcda Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 352 | NFR Bear Paw Basin, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2013 |
| 353 | NFR Energy, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2017 |
| 354 | NGC Energy Co. | | Oil & Gas Operator | May 1989 |
| 355 | Ngezi, LCC | Fort Worth, TX 76111 | Oil & Gas Operator | Jun 2025 |
| 356 | NGL Processing, LLC | | Oil Operator | Jun 2000 |
| 357 | NGM Noble LTD | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 358 | Ngo Development Corp. | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 359 | NGS, Inc. | Borger, TX 79008 | Gas Operator | Jun 2025 |
| 360 | NGX Company | Roswell, NM 88202 | Oil & Gas Operator | Jul 2008 |
| 361 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 362 | NHRG Inc | Wichita Falls, TX 76308 | Oil Operator | Jun 2025 |
| 363 | Nicco Operating Co. | | Oil & Gas Operator | May 1990 |
| 364 | Nicholas Water Service, Inc. | Zenda, KS 67159 | Oil Operator | Mar 2006 |
| 365 | Nichols Brothers | Abilene, TX 79604 | Oil & Gas Operator | Jun 2025 |
| 366 | Nichols Fluid Service, Inc. | Liberal, KS 67901 | Oil Operator | Jun 2019 |
| 367 | Nichols Oil & Gas Corporation | Shreveport, LA 71135 | Oil & Gas Operator | Aug 2003 |
| 368 | Nichols Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2025 |
| 369 | Nichols Oil Corp. | Holcomb, KS 67846 | Oil Operator | Dec 1994 |
| 370 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 371 | Nichols Water Service Inc | Forgan, OK 73938 | Oil & Gas Operator | May 2018 |
| 372 | Nichols, Carl E. | Azle, TX 76098 | Oil & Gas Operator | Aug 2004 |
| 373 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 374 | Nichols, John Wesley | Little Elm, TX 75068 | Oil & Gas Operator | Jul 2011 |
| 375 | Nichols,Edwin S Explorations Inc | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 376 | Nick Oil | Abilene, TX 79601 | Oil & Gas Operator | Jun 2025 |
| 377 | Nickel Road Operating LLC | | Oil & Gas Operator | Sep 2024 |
| 378 | Nickell & Son Oil & Salvage | Parker, KS 66072 | Oil Operator | Aug 2006 |
| 379 | Nickell Drilling | | Oil Operator | Jun 2010 |
| 380 | Nickell Oil Company | Walters, OK 73572 | Oil Operator | Apr 2018 |
| 381 | Nickerson, Royal | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 382 | Nicki T Oil & Gas LLC | Midland, TX 79711 | Oil Operator | Jun 2025 |
| 383 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 384 | Nicklos Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Nov 1986 |
| 385 | Nicolaysen G G Jr | | Oil & Gas Operator | Dec 1995 |
| 386 | Nicor Exploration | | Oil Operator | Jul 1993 |
| 387 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 388 | Nicor Production Company | Houston, TX 77002 | Oil & Gas Operator | May 1993 |
| 389 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 390 | Niedorf, Patrick Stephen | San Antonio, TX 78239 | Oil Operator | Jul 2001 |
| 391 | Niefergold, Martin & Suzanne | Lawtons, NY 14091 | Gas Operator | Dec 2023 |
| 392 | Niehage Oil Company, LLC | McPherson, KS 67460 | Oil Operator | Feb 2025 |
| 393 | Nielco, Inc. | Billings, MT 59103 | Oil & Gas Operator | Apr 2002 |
| 394 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 395 | Nielson Capital Partners LLC | Cody, WY 82414 | Oil & Gas Operator | Dec 2014 |
| 396 | Nielson Enterpri | | Oil & Gas Operator | Sep 1987 |
| 397 | Nieset Lawrence & Christopher | Helena, OH 43435 | Oil Operator | Dec 2024 |
| 398 | Night Owl Well Service | Cairo, WV 26337-0000 | Oil & Gas Operator | Dec 2021 |
| 399 | Nightengale Henr | | Gas Operator | Nov 1996 |
| 400 | Nighthawk Production LLC | | Oil & Gas Operator | Jun 2018 |