| 401 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 402 | Eninun Inc | Dayton, OH 45415 | Oil & Gas Operator | Dec 1984 |
| 403 | Enterprise Energy Corp | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1985 |
| 404 | Enveron Corporation | Portage, MI 49024 | Oil & Gas Operator | Dec 2017 |
| 405 | Envirogas Inc | Hamburg, NY 14075 | Oil & Gas Operator | Dec 1992 |
| 406 | Environmental BR Ser Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 1987 |
| 407 | Environmental Exp Co | North Canton, OH 44720 | Oil & Gas Operator | Dec 1998 |
| 408 | Environmental Oil Co | Thornville, OH 43076 | Oil & Gas Operator | Dec 2024 |
| 409 | EOG Ohio, LLC | New Albany, OH 43054-2646 | Oil & Gas Operator | Mar 2026 |
| 410 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 411 | Eos Energy LLC | Columbus, OH 43026 | Oil & Gas Operator | Dec 2025 |
| 412 | EP Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Jan 1993 |
| 413 | Eqt Production Company | Pittsburg, PA 15222 | Oil & Gas Operator | Apr 2026 |
| 414 | Equinor USA Onshore Properties Inc. | Houston, TX 77042 | Oil & Gas Operator | Mar 2024 |
| 415 | Equitable Production Company | Charleston, WV 25302 | Oil & Gas Operator | Dec 2007 |
| 416 | Equity Oil & Gas Funds Inc | Orlando, FL 32837-6103 | Oil & Gas Operator | Dec 2025 |
| 417 | Eric Petroleum Corp | Austintown, OH 44515-1053 | Oil & Gas Operator | Dec 2025 |
| 418 | Erie Oil & Gas Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 1989 |
| 419 | Euroamerican Pet Corp | Columbus, OH 43229 | Gas Operator | Dec 1991 |
| 420 | Everflow Eastern Partners LP | Canfield, OH 44406 | Oil & Gas Operator | Dec 2025 |
| 421 | Evergreen Operating Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 422 | Excalibur Exploration Inc | Greentown, OH 44630 | Oil & Gas Operator | Dec 2020 |
| 423 | Exco - North Coast Energy Inc | Kittanning, PA 16201 | Oil & Gas Operator | Dec 2018 |
| 424 | Expand Oper LLC | Morgantown, WV 26508 | Oil & Gas Operator | Apr 2026 |
| 425 | Exploration Energy Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 2009 |
| 426 | Explore Energy Corp. | Westerville, OH 43086 | Oil & Gas Operator | Dec 2016 |
| 427 | Eyster Oil Company LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2025 |
| 428 | Falese Oil Co Inc | Mattoon, IL 61938-4122 | Oil & Gas Operator | Dec 1997 |
| 429 | Farr Enterprises Inc | West Union, WV 24656 | Oil & Gas Operator | Dec 2021 |
| 430 | Farrar Oil Company | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2000 |
| 431 | Faust H Floyd | Cardington, OH 43315 | Oil Operator | Dec 1998 |
| 432 | Ferenbaugh Albert & Denise | Danville, OH 43014 | Oil & Gas Operator | Dec 2025 |
| 433 | Fidelity Petroleum Corporation | Plano, TX 75074 | Oil & Gas Operator | Jul 2026 |
| 434 | Finck Oil & Gas Co | Junction City, OH 43748 | Oil & Gas Operator | Dec 2025 |
| 435 | Firestone Tire & Rubber | Akron, OH 44317 | Oil & Gas Operator | Dec 1989 |
| 436 | Fishburn Producing Inc | Marengo, OH 43334 | Oil & Gas Operator | Dec 2024 |
| 437 | Fishburn Services Inc | Marengo, OH 43334 | Oil & Gas Operator | Dec 1990 |
| 438 | Flame Energy Co Inc | Dalton, OH 44618 | Oil & Gas Operator | Dec 2006 |
| 439 | Fleeman Teresa R | Lower Salem, OH 45745 | Oil & Gas Operator | Dec 2025 |
| 440 | Fo Energy LLC | Canton, OH 44718 | Oil & Gas Operator | Dec 2025 |
| 441 | Foltz & Foltz LTD Partnership | Robertsville, OH 44670 | Oil & Gas Operator | Dec 2018 |
| 442 | Fornash Oil LLC | Waynesburg, OH 44688 | Oil & Gas Operator | Dec 2025 |
| 443 | Fortune Gas & Oil | Shreveport, LA 71118-3457 | Oil & Gas Operator | Dec 2002 |
| 444 | Fouss Energy LLC | Whipple, OH 45788 | Oil & Gas Operator | Dec 2025 |
| 445 | Fouts Operations Inc | Glouster, OH 45732 | Oil & Gas Operator | Dec 1987 |
| 446 | Fouts William Bruce | Glouster, OH 45732 | Oil & Gas Operator | Dec 2024 |
| 447 | Frank Brendel Oil & Gas LLC | Canal Fulton, OH 44614-5817 | Oil & Gas Operator | Dec 2025 |
| 448 | Franklin Gas & Oil Co LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2025 |
| 449 | Frantz Enterprises LTD. | Tiffin, OH 44883 | Oil & Gas Operator | Dec 2025 |
| 450 | Frazee Paul O | Walhonding, OH 43843 | Oil & Gas Operator | Dec 1994 |
| 451 | Fredebaugh Well DRLG Co | Grand River, OH 44045 | Oil & Gas Operator | Dec 1991 |
| 452 | Frederick Petroleum Corp | Lowell, OH 45744 | Oil & Gas Operator | Dec 1990 |
| 453 | Fremont Energy Inc | University Heights, OH 44118-3818 | Oil & Gas Operator | Dec 2019 |
| 454 | Frost Black Creek Oil & Gas Production LLC | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2025 |
| 455 | Frost R Z & Assoc Inc | Chauncey, OH 45719 | Oil & Gas Operator | Dec 1988 |
| 456 | Future Energy Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 457 | Future Production Inc | Canton, OH 44708 | Oil & Gas Operator | Dec 2023 |
| 458 | G & O Resources LTD | Akron, OH 44311 | Oil & Gas Operator | Dec 2020 |
| 459 | G & S Oil & Gas Inc | Parkersburg, WV 26101-5762 | Oil & Gas Operator | Dec 2015 |
| 460 | G W F Corporation | Columbus, OH 43215 | Oil & Gas Operator | Dec 2003 |
| 461 | G-R Contracting Inc | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2025 |
| 462 | G-R-F Energy, Inc | Kenton, OH 43326 | Oil & Gas Operator | Dec 1994 |
| 463 | Gaia Exploration LLC | Cumberland, OH 43732-9760 | Oil & Gas Operator | Dec 2025 |
| 464 | Gallwitz Ray Stephen | Walhonding, OH 43843 | Oil Operator | Dec 2025 |
| 465 | Gao Holdings Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 2025 |
| 466 | Garver Oil LLC | Mansfield, OH 44907 | Oil & Gas Operator | Dec 2025 |
| 467 | Gas & Oil Pipe Supply | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2006 |
| 468 | Gas Acquisition Co LTD | Akron, OH 44308 | Oil & Gas Operator | Dec 2017 |
| 469 | Gas Enterprise Company Inc | Wingett Run, OH 45789 | Oil & Gas Operator | Dec 2025 |
| 470 | Gasearch Inc | Girard, OH 44420 | Oil & Gas Operator | Dec 1985 |
| 471 | Ge Consumer & Industrial | Louisville, KY 40225 | Oil & Gas Operator | Dec 2006 |
| 472 | Geitgey Donald W Jr | N Canton, OH 44721 | Oil & Gas Operator | Dec 2024 |
| 473 | Gemak Exp Inc | Dayton, OH 45414 | Oil Operator | Dec 1998 |
| 474 | Genesis Resources LLC | Parkersburg, WV 26104 | Oil & Gas Operator | Dec 2019 |
| 475 | Geo Energy Inc | Dublin, OH 43017 | Oil & Gas Operator | Dec 1989 |
| 476 | Geo Kat LLC | Millersport, OH 43046 | Oil & Gas Operator | Dec 2025 |
| 477 | Geopetro Inc | Worthington, OH 43085 | Oil & Gas Operator | Dec 1994 |
| 478 | Geopetro LLC | Worthington, OH 43085-2316 | Oil & Gas Operator | Apr 2026 |
| 479 | George W Plant Drilling | Corning, OH 43730 | Oil Operator | Dec 2025 |
| 480 | Geostrata Inc | Chagrin Falls, OH 44022 | Oil & Gas Operator | Dec 1993 |
| 481 | Giant Petroleum Corp | Jefferson, OH 44047 | Oil & Gas Operator | Dec 1990 |
| 482 | Gilbert Oil Co | Ravenna, OH 44266 | Oil & Gas Operator | Dec 1988 |
| 483 | Gingerich Mike | McConnelsville, OH 43756 | Oil & Gas Operator | Dec 2010 |
| 484 | Glacier Energy Corp | Bellevue, WA 98004 | Oil & Gas Operator | Dec 1991 |
| 485 | Gleneayre Resources Inc | Reno, OH 45773 | Oil & Gas Operator | Dec 1990 |
| 486 | GM/Delphi Packard Elec. | Warren, OH 44486 | Oil & Gas Operator | Dec 1995 |
| 487 | Goehler Oil & Gas LLC | Cortland, NY 13045 | Oil & Gas Operator | Dec 2021 |
| 488 | Gomez Stella M | Warsaw, OH 43844 | Oil & Gas Operator | Dec 2010 |
| 489 | Gonzoil Inc | Canton, OH 44718-1806 | Oil & Gas Operator | Dec 2018 |
| 490 | Goodyear Tire & Rubber | Akron, OH 44316 | Oil & Gas Operator | Dec 2008 |
| 491 | Gordon Energy Corp | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 1991 |
| 492 | Gormley Joseph A | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2018 |
| 493 | Gossett, Henry O., Jr. | Longview, TX 75606 | Oil & Gas Operator | Dec 2001 |
| 494 | Gradall Co | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2025 |
| 495 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 496 | Graymarr LLC | Graysville, OH 45734 | Oil & Gas Operator | Dec 2025 |
| 497 | Great Plains Exploration LLC | Mentor, OH 44060 | Oil & Gas Operator | Dec 2016 |
| 498 | Green Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2025 |
| 499 | Green Gas Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2020 |
| 500 | Greenbrier Energy Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 2025 |