| 601 | Jonsu Oil Corp | Granville, OH 43023 | Oil & Gas Operator | Dec 1994 |
| 602 | Jr Oil | Chanute, KS 66720 | Oil & Gas Operator | Oct 2019 |
| 603 | JRD Energy | Wooster, OH 44691 | Oil & Gas Operator | Dec 1999 |
| 604 | JRM Oil Co | Dalton, OH 44618 | Oil & Gas Operator | Dec 1993 |
| 605 | K & W Oil Company | MT Carmel, IL 62830 | Oil & Gas Operator | May 2013 |
| 606 | K A Brown Oil & Gas LLC | Sardis, OH 43946 | Oil & Gas Operator | Dec 2023 |
| 607 | K. Petroleum, Inc. | Gahanna, OH 43230 | Oil & Gas Operator | Dec 2023 |
| 608 | Kastle Resources Enterprises Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2023 |
| 609 | KBD Oil And Gas Production LLC | Brinkhaven, OH 43006 | Oil & Gas Operator | Dec 2022 |
| 610 | Kehl Oil & Gas Enterprises LLC | Lower Salem, OH 45745 | Oil & Gas Operator | Dec 2023 |
| 611 | Keith Lynn Minerals LLC | Springfield, OH 45503 | Oil & Gas Operator | Dec 2023 |
| 612 | Keito Gas Inc | Reno, OH 45773 | Oil & Gas Operator | Dec 2020 |
| 613 | Keller Brothers & Co | Nelsonville, OH 45764 | Oil Operator | Dec 2019 |
| 614 | Kenoil LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2022 |
| 615 | Kerogen Resources | Gratiot, OH 43740 | Oil & Gas Operator | Dec 2004 |
| 616 | Ketcham VIctor A | Columbus, OH 43214 | Oil Operator | Dec 2021 |
| 617 | Kidd Charlie Drilling | Utica, OH 43080 | Oil & Gas Operator | Dec 2002 |
| 618 | Kidd William E Production | Gambier, OH 43022 | Oil & Gas Operator | Dec 1993 |
| 619 | Kilbarger Investments Inc | Logan, OH 43138 | Oil & Gas Operator | Dec 2022 |
| 620 | Killbuck Oilfield Service | Killbuck, OH 44637 | Oil & Gas Operator | Dec 2022 |
| 621 | King Drilling Co | Seville, OH 44273-52-52 | Oil & Gas Operator | Jan 2024 |
| 622 | King Petroleum 1 | Cleveland, OH 44115 | Oil Operator | Dec 2008 |
| 623 | King Petroleum 2 | Nashport, OH 43830 | Oil & Gas Operator | Dec 2022 |
| 624 | Kingston Oil Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2000 |
| 625 | Kistler John & Ruth | Newcomerstown, OH 43832 | Oil & Gas Operator | Dec 1998 |
| 626 | Kleese Development Associates | Youngstown, OH 44514 | Oil & Gas Operator | Dec 2023 |
| 627 | KLJ Inc | Graysville, OH 45734 | Oil & Gas Operator | Dec 2002 |
| 628 | Kmfad Oil And Gas LLC | Warsaw, OH 43844 | Oil & Gas Operator | Dec 2022 |
| 629 | Knox Energy Inc | Pataskala, OH 43062 | Oil & Gas Operator | Dec 2022 |
| 630 | Kramer Exploration Co. | Delaware, OH 43015 | Oil & Gas Operator | Dec 2009 |
| 631 | Kroll Energy LLC | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2022 |
| 632 | KST Oil & Gas Co Inc | Tallmadge, OH 44278-1142-1142 | Oil & Gas Operator | Dec 1995 |
| 633 | Kuhn Richard F | Baltimore, OH 43105 | Oil Operator | Dec 2022 |
| 634 | L & M Petroleum Co | Reno, OH 45773 | Oil & Gas Operator | Dec 1987 |
| 635 | L & S Oil And Gas | Newark, OH 43055-8732-8732 | Oil & Gas Operator | Dec 2014 |
| 636 | Lahd Energy Inc | Canton, OH 44709 | Gas Operator | Dec 2009 |
| 637 | Lake Energy LLC | Chagrin Falls, OH 44023 | Oil & Gas Operator | Dec 2023 |
| 638 | Lake Region Oil Inc | Massillon, OH 44648 | Oil & Gas Operator | Dec 2023 |
| 639 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 640 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2022 |
| 641 | Landprovest Inc | Cambridge, OH 43725-858-858 | Oil & Gas Operator | Dec 1993 |
| 642 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2022 |
| 643 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 644 | Larry H Wright Inc | Naples, FL 34108-2156-2156 | Oil & Gas Operator | Dec 1993 |
| 645 | Lauber Floyd | Dayton, OH 45415 | Oil & Gas Operator | Dec 1997 |
| 646 | Layline Oil And Gas LLC | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 647 | LBJ Drilling Co Inc | Martinsburg, OH 43037 | Oil & Gas Operator | Dec 2022 |
| 648 | Leach Joseph L | Gallipolis, OH 45631 | Oil & Gas Operator | Dec 2023 |
| 649 | Leader Equities Inc | Columbus, OH 43214 | Oil & Gas Operator | Dec 1988 |
| 650 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 651 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2022 |
| 652 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 653 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2023 |
| 654 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900-2900 | Oil & Gas Operator | Dec 1997 |
| 655 | Lewis Lawrence W & Kimberly D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2022 |
| 656 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489-2489 | Oil & Gas Operator | Dec 2021 |
| 657 | Lighthizer Charles O | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1997 |
| 658 | Lincoln Oil Well Service | Riverside, IL 60546 | Oil & Gas Operator | Dec 1990 |
| 659 | Lippizan Petroleum, Inc. | Ellenboro, WV 26346 | Oil & Gas Operator | Dec 2023 |
| 660 | Lishberg Petroleum Inc | Jerusaleum, OH 43747 | Oil & Gas Operator | Dec 2022 |
| 661 | LLP Gas And Oil Corporation | Dover, OH 44622 | Oil & Gas Operator | Dec 2023 |
| 662 | Log Energy | MT Gilead, OH 43338 | Oil Operator | Dec 2023 |
| 663 | Logan Clay Prod Company | Logan, OH 43138 | Oil & Gas Operator | Dec 2005 |
| 664 | Loma Enterprises Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 1998 |
| 665 | Lothes John W | Newark, OH 43055 | Oil & Gas Operator | Dec 2023 |
| 666 | Lucas Well Service, Inc. | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 667 | Ludco Inc | Caledonia, OH 43314 | Oil & Gas Operator | Dec 1986 |
| 668 | Ludlow Oil & Gas Company LLC | New Matamoras, OH 45767-5058-5058 | Oil & Gas Operator | Dec 2022 |
| 669 | Ludwig Cleo R | Caledonia, OH 43314 | Oil & Gas Operator | Dec 1987 |
| 670 | Luling Oil & Gas Co Inc | San Antonio, TX 78209 | Oil Operator | Dec 1986 |
| 671 | Luoil Inc | Corning, OH 43730 | Oil & Gas Operator | Dec 2023 |
| 672 | Lydic, W. J., Inc. | Zanesville, OH 43702-2310-2310 | Oil & Gas Operator | Jan 2005 |
| 673 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Apr 2024 |
| 674 | M & L Drilling Co | Utica, OH 43080-176-176 | Oil & Gas Operator | Dec 1992 |
| 675 | M & M Royalty LTD | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 676 | M & R Investments Ohio LLC | Birmingham, AL 35238 | Oil & Gas Operator | Dec 2019 |
| 677 | M & S Oil Co | Lawrenceburg, IN 47025-8675-8675 | Oil & Gas Operator | Aug 2000 |
| 678 | M C F Oil Co Inc | Dellroy, OH 44620 | Oil & Gas Operator | Dec 1995 |
| 679 | M M Resources, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 680 | M S Exploration Inc | Lexington, OH 44904-9510-9510 | Oil & Gas Operator | Dec 1999 |
| 681 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Apr 2024 |
| 682 | Mac Oil Field Service Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2022 |
| 683 | Mackenco Inc | Columbus, OH 43235 | Oil & Gas Operator | Dec 2020 |
| 684 | Madco Energy Corp | Logan, OH 43138 | Oil & Gas Operator | Dec 1987 |
| 685 | Mainspring LLC | Uhrichsville, OH 44683 | Oil & Gas Operator | Dec 2023 |
| 686 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 687 | Mallett Luke-Dba Mallett Energy | New Concord, OH 43762 | Oil & Gas Operator | Dec 2016 |
| 688 | Malvern Group Inc | Clearwater, FL 33758-6817-6817 | Oil & Gas Operator | Mar 2005 |
| 689 | Manitou Explor Co Inc | Granville, OH 43023 | Oil & Gas Operator | Dec 1997 |
| 690 | Mar Oil Company | Upper Sandusky, OH 43351 | Oil & Gas Operator | Dec 2023 |
| 691 | Maram Energy Inc | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 2022 |
| 692 | Maranatha Exploration Inc | Killbuck, OH 44637 | Oil & Gas Operator | Dec 1992 |
| 693 | Marden Petroleum Exp Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 694 | Mare Energy | Danville, OH 43014 | Oil & Gas Operator | Dec 2021 |
| 695 | Mare Energy LLC | Danville, OH 43014 | Oil & Gas Operator | Dec 2023 |
| 696 | Marietta Royalty Co Inc | Stillwater, OK 74076 | Oil & Gas Operator | Dec 1986 |
| 697 | Marion Operating Corp | Marion, OH 43301-0453-0453 | Oil & Gas Operator | Dec 2020 |
| 698 | Marjac Energy Co | Bremen, OH 43107 | Oil & Gas Operator | Dec 1986 |
| 699 | Mark Producing, Inc. | Houston, TX 77057 | Oil & Gas Operator | Dec 1987 |
| 700 | Mark Resources Corp | Pittsburgh, PA 15276 | Oil & Gas Operator | Dec 1993 |