| 701 | Ketcham VIctor A | Columbus, OH 43214 | Oil Operator | Dec 2021 |
| 702 | Kidd Charlie Drilling | Utica, OH 43080 | Oil & Gas Operator | Dec 2002 |
| 703 | Kidd William E Production | Gambier, OH 43022 | Oil & Gas Operator | Dec 1993 |
| 704 | Kilbarger Investments Inc | Logan, OH 43138 | Oil & Gas Operator | Dec 2024 |
| 705 | Killbuck Creek Oil Co LLC | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 706 | Killbuck Oilfield Service | Killbuck, OH 44637 | Oil & Gas Operator | Dec 2022 |
| 707 | King Drilling Co | Seville, OH 44273 | Oil & Gas Operator | Jan 2025 |
| 708 | King Petroleum 2 | Nashport, OH 43830 | Oil & Gas Operator | Dec 2023 |
| 709 | Kingston Oil Corp | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2000 |
| 710 | Kistler John & Ruth | Newcomerstown, OH 43832 | Oil & Gas Operator | Dec 1998 |
| 711 | Kleese Development Associates | Youngstown, OH 44514 | Oil & Gas Operator | Dec 2024 |
| 712 | KLJ Inc | Graysville, OH 45734 | Oil & Gas Operator | Dec 2002 |
| 713 | Kmfad Oil And Gas LLC | Coshocton, OH 43812 | Oil & Gas Operator | Dec 2023 |
| 714 | Knox Energy Inc | New Albany, OH 43054 | Oil & Gas Operator | Dec 2024 |
| 715 | Kramer Exploration Co. | Delaware, OH 43015 | Oil & Gas Operator | Dec 2009 |
| 716 | Krams Oil & Gas LLC | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2024 |
| 717 | Kraus Edward L | Medina, OH 44256-8401 | Oil & Gas Operator | Dec 2024 |
| 718 | Kroll Energy LLC | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 719 | KST Oil & Gas Co Inc | Tallmadge, OH 44278-1142 | Oil & Gas Operator | Dec 1995 |
| 720 | Kuhn Richard F | Baltimore, OH 43105 | Oil Operator | Dec 2022 |
| 721 | Kundtz Properties Inc | Orange VIllage, OH 44122 | Gas Operator | Dec 2024 |
| 722 | L & B Energy LLP | Kingsville, OH 44048 | Oil & Gas Operator | Dec 2023 |
| 723 | L & F Oil & Gas LLC | New Comerstown, OH 43832 | Oil & Gas Operator | Dec 2024 |
| 724 | L & M Petroleum Co | Reno, OH 45773 | Oil & Gas Operator | Dec 1987 |
| 725 | L & S Oil & Gas LTD | Newark, OH 43055 | Oil & Gas Operator | Dec 2022 |
| 726 | L & S Oil And Gas | Newark, OH 43055-8732 | Oil & Gas Operator | Dec 2014 |
| 727 | Lahd Energy Inc | Canton, OH 44709 | Gas Operator | Dec 2009 |
| 728 | Lake Energy LLC | Chagrin Falls, OH 44023 | Oil & Gas Operator | Dec 2024 |
| 729 | Lake Region Oil Inc | Massillon, OH 44648 | Oil & Gas Operator | Dec 2024 |
| 730 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 731 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2024 |
| 732 | Landprovest Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1993 |
| 733 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2024 |
| 734 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 735 | Larkman Properties | Logan, OH 43138 | Oil & Gas Operator | Dec 2017 |
| 736 | Larry H Wright Inc | Naples, FL 34108-2156 | Oil & Gas Operator | Dec 1993 |
| 737 | Lauber Floyd | Dayton, OH 45415 | Oil & Gas Operator | Dec 1997 |
| 738 | Lawrence Smith Oil LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2023 |
| 739 | Layline Oil And Gas LLC | Marion, MI 49665 | Oil & Gas Operator | Dec 2025 |
| 740 | LBJ Drilling Co Inc | Martinsburg, OH 43037 | Oil & Gas Operator | Dec 2024 |
| 741 | Leach Joseph L | Gallipolis, OH 45631 | Oil & Gas Operator | Dec 2023 |
| 742 | Leader Equities Inc | Columbus, OH 43214 | Oil & Gas Operator | Dec 1988 |
| 743 | Legacy Ogc LLC | Erie, PA 16509 | Oil & Gas Operator | Dec 2024 |
| 744 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 745 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 746 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 747 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 748 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900 | Oil & Gas Operator | Dec 1997 |
| 749 | Liberty Oil & Gas Corp | Olney, IL 62450-2489 | Oil & Gas Operator | Dec 2021 |
| 750 | Lighthizer Charles O | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1997 |
| 751 | Lincoln Oil Well Service | Riverside, IL 60546 | Oil & Gas Operator | Dec 1990 |
| 752 | Lippizan Petroleum, Inc. | Ellenboro, WV 26346 | Oil & Gas Operator | Dec 2024 |
| 753 | Lishberg Petroleum Inc | Jerusaleum, OH 43747 | Oil & Gas Operator | Dec 2024 |
| 754 | LLP Gas And Oil Corporation | Dover, OH 44622 | Oil & Gas Operator | Dec 2024 |
| 755 | Log Energy | MT Gilead, OH 43338 | Oil Operator | Dec 2024 |
| 756 | Logan Clay Prod Company | Logan, OH 43138 | Oil & Gas Operator | Dec 2005 |
| 757 | Logan Gas Inc | Logan, OH 43138 | Oil & Gas Operator | Dec 2024 |
| 758 | Loma Enterprises Inc | Cortland, OH 44410 | Oil & Gas Operator | Dec 1998 |
| 759 | Lopez Norman H | Victor, NY 14564 | Oil & Gas Operator | Dec 1990 |
| 760 | Lothes John W | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 761 | Lowry Oil & Gas LLC | Norwich, OH 43767 | Oil & Gas Operator | Dec 2024 |
| 762 | Lucas Well Service, Inc. | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 763 | Ludco Inc | Caledonia, OH 43314 | Oil & Gas Operator | Dec 1986 |
| 764 | Ludlow Oil & Gas Company LLC | New Matamoras, OH 45767-5058 | Oil & Gas Operator | Dec 2024 |
| 765 | Ludwig Cleo R | Caledonia, OH 43314 | Oil & Gas Operator | Dec 1987 |
| 766 | Luling Oil & Gas Co Inc | San Antonio, TX 78209 | Oil Operator | Dec 1986 |
| 767 | Luoil Inc | Corning, OH 43730 | Oil & Gas Operator | Dec 2024 |
| 768 | Lutes Daun | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 769 | Lydic, W. J., Inc. | Zanesville, OH 43702-2310 | Oil & Gas Operator | Jan 2005 |
| 770 | Lynn Riggs LLC | Sebring, OH 44672 | Oil & Gas Operator | Dec 2024 |
| 771 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Feb 2026 |
| 772 | M & L Drilling Co | Utica, OH 43080 | Oil & Gas Operator | Dec 1992 |
| 773 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 774 | M & M Royalty LTD | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 775 | M & R Investments Ohio LLC | Birmingham, AL 35238 | Oil & Gas Operator | Dec 2019 |
| 776 | M & S Oil Co | Lawrenceburg, IN 47025-8675 | Oil & Gas Operator | Aug 2000 |
| 777 | M C F Oil Co Inc | Dellroy, OH 44620 | Oil & Gas Operator | Dec 1995 |
| 778 | M S Exploration Inc | Lexington, OH 44904-9510 | Oil & Gas Operator | Dec 1999 |
| 779 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Feb 2026 |
| 780 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 781 | Mac Oil Field Service Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2024 |
| 782 | Mackenco Inc | Columbus, OH 43235 | Oil & Gas Operator | Dec 2020 |
| 783 | Madco Energy Corp | Logan, OH 43138 | Oil & Gas Operator | Dec 1987 |
| 784 | Madden Ventures | Mundelein, IL 60060 | Oil & Gas Operator | Dec 2008 |
| 785 | Mainspring LLC | Uhrichsville, OH 44683 | Oil & Gas Operator | Dec 2024 |
| 786 | Majestic Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2007 |
| 787 | Mallett Luke-Dba Mallett Energy | New Concord, OH 43762 | Oil & Gas Operator | Dec 2016 |
| 788 | Malvern Group Inc | Clearwater, FL 33758-6817 | Oil & Gas Operator | Mar 2005 |
| 789 | Manitou Explor Co Inc | Granville, OH 43023 | Oil & Gas Operator | Dec 1997 |
| 790 | Mar Oil Company | Upper Sandusky, OH 43351 | Oil & Gas Operator | Dec 2023 |
| 791 | Maram Energy Inc | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 2024 |
| 792 | Maranatha Exploration Inc | Killbuck, OH 44637 | Oil & Gas Operator | Dec 1992 |
| 793 | Marden Petroleum Exp Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 794 | Mare Energy | Danville, OH 43014 | Oil & Gas Operator | Dec 2021 |
| 795 | Mare Energy LLC | Danville, OH 43014 | Oil & Gas Operator | Dec 2024 |
| 796 | Marietta Royalty Co Inc | Stillwater, OK 74076 | Oil & Gas Operator | Dec 1986 |
| 797 | Marion Operating Corp | Marion, OH 43301 | Oil & Gas Operator | Dec 2020 |
| 798 | Marjac Energy Co | Bremen, OH 43107 | Oil & Gas Operator | Dec 1986 |
| 799 | Mark Producing Inc | Houston, TX 77057 | Oil & Gas Operator | Dec 1987 |
| 800 | Mark Resources Corp | Pittsburgh, PA 15276 | Oil & Gas Operator | Dec 1993 |