| 301 | Global Oklahoma Production | Tulsa, OK 74146 | Oil & Gas Operator | May 2024 |
| 302 | Golden Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 303 | Golden West Energy LTD | | Oil & Gas Operator | Apr 2020 |
| 304 | Gopher Oil Company | | Oil & Gas Operator | Jan 2025 |
| 305 | Gore Sidney | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2016 |
| 306 | Grace Oil Company Inc | Monahans, TX 79756 | Oil & Gas Operator | Oct 2011 |
| 307 | Graham, Marion T | | Oil Operator | Jan 2025 |
| 308 | Gram Oil Co | Bartlesville, OK 74003 | Oil Operator | Dec 2011 |
| 309 | Grand Production Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Aug 2000 |
| 310 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2025 |
| 311 | Graves J M | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2007 |
| 312 | Graves John G Oil Prop Inc | Tulsa, OK 74116-5666 | Oil & Gas Operator | Feb 2001 |
| 313 | Gray Fox Operating Company | Tulsa, OK 74119 | Oil Operator | May 1993 |
| 314 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Jan 2025 |
| 315 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Jan 2025 |
| 316 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 317 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Dec 2024 |
| 318 | Great Southwestern Expl Inc | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 319 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 320 | Greene David L II LLC | Bartlesville, OK 74005 | Oil Operator | Jan 2025 |
| 321 | Greenwood Energy Inc | Oklahoma City, OK 73116-9083 | Oil & Gas Operator | Mar 2015 |
| 322 | Greenwood Oil Company | Skiatook, OK 74070 | Oil & Gas Operator | Aug 2013 |
| 323 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 324 | Gross, Charles E. | Dallas, TX 75220 | Oil & Gas Operator | Feb 2012 |
| 325 | Ground Development Company Inc | Dallas, TX 75229-0377 | Oil & Gas Operator | Jan 2013 |
| 326 | H & H Oil Productions | Tulsa, OK 74145 | Oil Operator | Jul 1999 |
| 327 | H & W Drilling Inc | Pomeroy, OH 45769 | Oil & Gas Operator | Dec 2023 |
| 328 | H B Oil & Gas Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Jun 2000 |
| 329 | H R Collier Collier Oil & Gas | | Oil & Gas Operator | Jan 2025 |
| 330 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 331 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 332 | Hanover Operating Company | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1998 |
| 333 | Hansen Noel | Avant, OK 74001 | Oil Operator | Aug 2013 |
| 334 | Hard Rock Operating, LLC | Pawhuska, OK 74056 | Oil & Gas Operator | May 2022 |
| 335 | Harden Operating Company Inc | Tulsa, OK 74106-2722 | Oil & Gas Operator | Sep 2006 |
| 336 | Harold M Root Foundation | | Oil Operator | Jan 2025 |
| 337 | Harrington Billy B | Depew, OK 74028-3495 | Oil & Gas Operator | May 2006 |
| 338 | Harris Mildred C | Tulsa, OK 74120 | Oil & Gas Operator | Dec 2024 |
| 339 | Harris Minerals Corp (The) | Oklahoma City, OK 73162-1045 | Oil & Gas Operator | Jan 2025 |
| 340 | Haught Harold | Hominy, OK 74035 | Oil Operator | Feb 2012 |
| 341 | Hayes & Hudson | Bartlesville, OK 74003 | Oil & Gas Operator | Jan 2025 |
| 342 | Hays Stanley L | Wynola, OK 74084 | Oil Operator | May 2022 |
| 343 | HB Oil Company | Abilene, TX 79602 | Oil & Gas Operator | Jun 2023 |
| 344 | Heller, Phillip & Charlene | Columbia, MO 65201 | Oil & Gas Operator | Jan 2025 |
| 345 | Helmco Production Company | Pawhuska, OK 74056 | Oil Operator | Aug 2000 |
| 346 | Helmer Bonnie Jean Revocable Trust | Pawhuska, OK 74056 | Oil Operator | Jan 2025 |
| 347 | Helmer Oil Corporation | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2025 |
| 348 | Hembree Brit W | Shawnee, OK 74802-1725 | Oil & Gas Operator | Oct 2024 |
| 349 | Henderson Art | Pawhuska, OK 74056 | Oil & Gas Operator | May 2014 |
| 350 | Henley Dean | Pawhuska, OK 74056 | Oil Operator | Jan 2025 |
| 351 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 352 | Heuston Oil LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 353 | Hewitt Doug | Hominy, OK 74035 | Oil Operator | Jul 2024 |
| 354 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 355 | Hightower Energy LLC | Cushing, OK 74023-6370 | Oil & Gas Operator | Feb 2025 |
| 356 | Hillside Resources | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2007 |
| 357 | HMX Investments Inc | Katy, TX 77494 | Oil & Gas Operator | Jan 2025 |
| 358 | Hobo Oil & Gas | Wynona, OK 74084 | Oil & Gas Operator | Aug 2013 |
| 359 | Holloway David A | Okmulgee, OK 74447-9191 | Oil & Gas Operator | Jan 2025 |
| 360 | Holt Andrew L "Mickey" | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2008 |
| 361 | Holt James | Skiatook, OK 74070-0006 | Oil & Gas Operator | Feb 2020 |
| 362 | Horizon & Barnsdall | Tulsa, OK 74102 | Oil Operator | Feb 2012 |
| 363 | Horn Hank | Pawauska, OK 74056 | Oil Operator | Apr 2009 |
| 364 | Horn Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Jan 2025 |
| 365 | Horn R L & Sons Drilling | | Oil Operator | Jun 1997 |
| 366 | Hough Oil And Gas | Hominy, OK 74035 | Oil Operator | Jan 2025 |
| 367 | Howell Jason | Wynona, OK 74084 | Oil Operator | Jan 2025 |
| 368 | Howell'S Well Service, Inc. | | Oil & Gas Operator | Jan 2025 |
| 369 | Hudgens Lester E | Bartlesville, OK 74006-0215 | Oil Operator | Mar 2015 |
| 370 | Hudson Energy LLC | Bartlesville, OK 74006 | Oil Operator | Nov 2024 |
| 371 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 372 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 373 | Huitt Joe A Rev Trust | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2009 |
| 374 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 375 | Hulse Steve & Frank | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2000 |
| 376 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 377 | Hurd Gary Oil Co | Wynona, OK 74084 | Oil & Gas Operator | Jan 2025 |
| 378 | Hurd J Oil LLC | Bartlesville, OK 74003 | Oil Operator | Jan 2025 |
| 379 | Hurd Oil Company | | Oil & Gas Operator | Jun 2015 |
| 380 | Hurricane Energy Corporation | | Oil & Gas Operator | Dec 2000 |
| 381 | Hutton Gas Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 382 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 383 | Igleheart Warren | Edmond, OK 73034-8964 | Oil & Gas Operator | Jun 2016 |
| 384 | Ikenberry Herman & Ikenberry | | Oil Operator | Jul 1999 |
| 385 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2025 |
| 386 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 387 | Indianola Oil Inc | Bartlesville, OK 74005 | Oil & Gas Operator | Aug 2000 |
| 388 | Ingersol Rosinbaum Oil Inc | Boerne, TX 78006 | Oil & Gas Operator | Jan 2025 |
| 389 | Ingersoll Oil Inc | Hominy, OK 74035 | Oil & Gas Operator | Jun 2000 |
| 390 | Integrated Energy Service Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 1998 |
| 391 | Iron Hawk Energy Group Joint Venture | Tulsa, OK 74103-3305 | Oil & Gas Operator | Jan 2025 |
| 392 | J B Hulet | | Oil & Gas Operator | Aug 2013 |
| 393 | J Petroleum, Inc. | San Antonio, TX 78247 | Oil & Gas Operator | Aug 2003 |
| 394 | J. C. Oil Company | Odessa, TX 79766 | Oil & Gas Operator | Mar 2015 |
| 395 | Jaco, Troy Inc. | Sherman, TX 75091 | Oil & Gas Operator | Apr 2025 |
| 396 | Jaed Oil Production Co Inc | Arkansas City, KS 67005-0902 | Oil & Gas Operator | Mar 2015 |
| 397 | James Oil Company | Compton, CA 90221-4399 | Oil & Gas Operator | Nov 2008 |
| 398 | James Raymond L | Sapulpa, OK 74066-8785 | Oil & Gas Operator | Jan 2025 |
| 399 | Jay B Harden | | Oil Operator | Jan 2025 |
| 400 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |