| 2401 | Great Plains Oil & Gas | Ada, OK 74820-7209 | Oil & Gas Operator | May 2013 |
| 2402 | Great Plains Operating Inc | Bristow, OK 74010 | Oil & Gas Operator | Dec 1998 |
| 2403 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Mar 2026 |
| 2404 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 2405 | Great Southwestern Expl Inc | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2026 |
| 2406 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 2407 | Great Western Equipment Co | Mustang, OK 73064 | Oil & Gas Operator | Apr 2026 |
| 2408 | Great Western Land Co Inc | Tulsa, OK 74136-1517 | Oil & Gas Operator | Jun 2000 |
| 2409 | Great Yellowstone Corporation | | Oil & Gas Operator | Apr 1993 |
| 2410 | Greehey & Company, LTD. | San Antonio, TX 78216 | Oil & Gas Operator | May 2020 |
| 2411 | Green Energy Company | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 2412 | Green Operating Company Inc | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2026 |
| 2413 | Green River Exploration Co | Tulsa, OK 74121-1468 | Oil & Gas Operator | Sep 2011 |
| 2414 | Green River Operating Co Inc | Noble, OK 73068-5521 | Oil & Gas Operator | Feb 2018 |
| 2415 | Green River Resources Inc. | Keystone, CO 80435 | Oil & Gas Operator | Jul 2026 |
| 2416 | Green Smith Energy LP | Glenpool, OK 74033-3122 | Oil & Gas Operator | May 2026 |
| 2417 | Green Valley Disposal Serv LLC | Alva, OK 73717 | Oil Operator | Apr 2026 |
| 2418 | Green William G | Jenks, OK 74037-3233 | Oil & Gas Operator | Apr 2020 |
| 2419 | Green'S Drillng & Mud Ser Inc | Konawa, OK 74849 | Oil Operator | Jan 2013 |
| 2420 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | May 2026 |
| 2421 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Mar 2026 |
| 2422 | Greenwood Energy Inc | Oklahoma City, OK 73116-9083 | Oil & Gas Operator | Mar 2015 |
| 2423 | Greenwood Janet | Mannford, OK 74044 | Oil Operator | Apr 2014 |
| 2424 | Greenwood Oil Company | Skiatook, OK 74070 | Oil & Gas Operator | Aug 2013 |
| 2425 | Greer & Beckham Gas Co Inc | Shamrock, TX 79079-0606 | Oil & Gas Operator | Aug 2013 |
| 2426 | Greer Family Trust | Ponca City, OK 74601-8126 | Oil Operator | Aug 2018 |
| 2427 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 2428 | Greg Davis Investments Inc | Edmond, OK 73034-6621 | Oil Operator | May 2020 |
| 2429 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Apr 2026 |
| 2430 | Gribble Jr R W | Dallas, TX 75235 | Oil & Gas Operator | Apr 2014 |
| 2431 | Gribble Oil Corporation | Dallas, TX 75235 | Oil Operator | Aug 1994 |
| 2432 | Griebel-Valliquette | Stroud, OK 74079-0231 | Oil & Gas Operator | Aug 2016 |
| 2433 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2026 |
| 2434 | Griffin Well Service Inc | Konawa, OK 74849-9710 | Oil & Gas Operator | Apr 2026 |
| 2435 | Griffith Petroleum Services Inc | Kingston, OK 73439 | Oil & Gas Operator | Apr 2026 |
| 2436 | Griggs Josh | Dewey, OK 74029 | Oil Operator | Apr 2026 |
| 2437 | Griggs Oil LLC | Dewey, OK 74029-0477 | Oil & Gas Operator | Apr 2026 |
| 2438 | Griswold Energy LLC | Oologah, OK 74053-6228 | Oil Operator | Apr 2026 |
| 2439 | Grizzly Energy Resources, L.L.C. | Midland, TX 79705 | Oil & Gas Operator | Mar 2026 |
| 2440 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 2441 | Grooms T D | Stillwater, OK 74075-3600 | Oil & Gas Operator | Oct 2001 |
| 2442 | Gross Jack L Production | Borger, TX 79008-0065 | Gas Operator | Mar 2015 |
| 2443 | Gross, Charles E. | Dallas, TX 75220 | Oil & Gas Operator | Feb 2012 |
| 2444 | Ground Development Company Inc | Dallas, TX 75229-0377 | Oil & Gas Operator | Jan 2013 |
| 2445 | Grubb F W "Forest" | Garber, OK 73738-0186 | Oil & Gas Operator | Jun 2005 |
| 2446 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 2447 | Gruenerwald WM & Assoc Inc | Colorado Spring, CO 80960-0669 | Oil & Gas Operator | Jan 2002 |
| 2448 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Apr 2014 |
| 2449 | Guest Petroleum Inc | Edmond, OK 73013 | Oil & Gas Operator | May 2026 |
| 2450 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 2451 | Gugli Corporation | Byng, OK 74820 | Oil & Gas Operator | Sep 2014 |
| 2452 | Guinn David E | Cleveland, OK 74020 | Oil & Gas Operator | Apr 2026 |
| 2453 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2026 |
| 2454 | Gulf Production Corp. | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 2455 | Gulfport Energy Corporation | Oklahoma City, OK 73114-5003 | Oil & Gas Operator | Mar 2026 |
| 2456 | Gulfport Midcon LLC | Oklahoma City, OK 73114-8132 | Oil & Gas Operator | May 2026 |
| 2457 | Gulfstream Petroleum Corp | | Oil & Gas Operator | Feb 2002 |
| 2458 | Gungoll Carl E Estate | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Aug 2000 |
| 2459 | Gungoll Henry H. Associates | Enid, OK 73701 | Oil & Gas Operator | Mar 2026 |
| 2460 | Gunsight Energy Inc | Floydada, TX 79235-2521 | Oil Operator | Jun 2009 |
| 2461 | Gunter Jim | Springer, OK 73458 | Oil Operator | Feb 2026 |
| 2462 | Gunvor USA LLC | Houston, TX 77002 | Oil Operator | Apr 2007 |
| 2463 | GW Investments, LLC | Mustang, OK 73064 | Oil Operator | May 2026 |
| 2464 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |
| 2465 | Gypsy Exploration LLC | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Dec 2014 |
| 2466 | Gypsyglenn Oil Company LLC | Tulsa, OK 74119-4809 | Oil & Gas Operator | May 2026 |
| 2467 | H & D Operating Company | Refugio, TX 78377 | Oil & Gas Operator | May 2015 |
| 2468 | H & H Drilling Company | Davis, OK 73030-2703 | Oil & Gas Operator | May 2014 |
| 2469 | H & H Energy Inc | Tuttle, OK 73089 | Oil Operator | May 2001 |
| 2470 | H & H Exploration | Tulsa, OK 74132 | Oil & Gas Operator | Jan 2006 |
| 2471 | H & H Oil Productions | Tulsa, OK 74145 | Oil Operator | Jul 1999 |
| 2472 | H & H Operating | Olney, TX 76374 | Oil & Gas Operator | Jul 2026 |
| 2473 | H & H Production | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2015 |
| 2474 | H & H Production Company | Muenster, TX 76252 | Oil & Gas Operator | Oct 2005 |
| 2475 | H & H Star Energy Inc | Traverse City, MI 49684 | Oil & Gas Operator | Aug 2016 |
| 2476 | H & K Oil Company | Kilgore, TX 75662 | Oil & Gas Operator | Nov 1998 |
| 2477 | H & L Operating Co., L.L.P. | Amarillo, TX 79114 | Oil & Gas Operator | Aug 2022 |
| 2478 | H & L Operating Company | Amarillo, TX 79114 | Oil & Gas Operator | Feb 2020 |
| 2479 | H & M Integrity LLC | Ratliff City, OK 73481-8052 | Oil Operator | Mar 2026 |
| 2480 | H & M Resources LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2026 |
| 2481 | H & T Brock Oil Company LLC | Comanche, OK 73529-7140 | Oil & Gas Operator | Feb 2024 |
| 2482 | H & W Drilling Inc | Racine, OH 45769 | Oil & Gas Operator | Dec 2023 |
| 2483 | H B Oil & Gas Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Jun 2000 |
| 2484 | H E C H Corporation | Ada, OK 74820-9528 | Oil Operator | Sep 2019 |
| 2485 | H G & G Inc | Edmond, OK 73034 | Oil & Gas Operator | Jan 2006 |
| 2486 | H L L Inc | Scottsdale, AZ 85251 | Oil & Gas Operator | Jan 2007 |
| 2487 | H R Collier Collier Oil & Gas | | Oil & Gas Operator | Apr 2026 |
| 2488 | H-Petro-R Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2026 |
| 2489 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 2490 | H2ok LLC | Marble Falls, TX 78654 | Oil & Gas Operator | May 2026 |
| 2491 | H2ox Operating LLC | Tulsa, OK 74103 | Oil Operator | May 2026 |
| 2492 | Haas Petroleum LLC | Prairie VIllage, KS 66208 | Oil Operator | Mar 2026 |
| 2493 | Hadaway Consulting And Engineering LLC | Canadian, TX 79014 | Oil & Gas Operator | May 2026 |
| 2494 | Hadaway Engineering Inc | Canadian, TX 79014 | Oil & Gas Operator | Jul 2015 |
| 2495 | Hadco LTD | Ardmore, OK 73401-6929 | Oil & Gas Operator | Mar 2015 |
| 2496 | Haddox Johnny C | Okemah, OK 74859-0254 | Oil Operator | Apr 2020 |
| 2497 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 2498 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 2499 | Hagler William N | Farmington, NM 87499-0035 | Oil Operator | Apr 2014 |
| 2500 | Hail Petroleum Corporation | Garland, TX 75047-5036 | Oil Operator | Mar 1997 |