| 801 | Og Co., Inc. | Zanesville, OH 43701 | Oil & Gas Operator | Feb 2019 |
| 802 | Ohio Energy Assets, Inc. | Laurelville, OH 43135 | Oil & Gas Operator | Dec 2014 |
| 803 | Ohio Energy Group Inc | Uniontown, OH 44685 | Oil & Gas Operator | Dec 1988 |
| 804 | Ohio Energy Operators LLC | Colorado Spring, CO 80908 | Oil Operator | Dec 2017 |
| 805 | Ohio Investment Leas Inc | Danville, OH 43014 | Oil & Gas Operator | Dec 1989 |
| 806 | Ohio L & M Company Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 2013 |
| 807 | Ohio Natural Fuel Co | Canton, OH 44718 | Oil & Gas Operator | Dec 1985 |
| 808 | Ohio Oil & Gas | Fowler, OH 44418 | Oil & Gas Operator | Dec 1988 |
| 809 | Ohio Production Corp | Westerville, OH 43081 | Oil & Gas Operator | Dec 2001 |
| 810 | Ohio Production* | Newark, OH 43055 | Oil & Gas Operator | Dec 1987 |
| 811 | Ohio Valley Energy System Corp | Austintown, OH 44515 | Oil & Gas Operator | Dec 2017 |
| 812 | Oil & Gas Solutions LTD | Wooster, OH 44691 | Oil & Gas Operator | Dec 2007 |
| 813 | Oil & Realty Devlop Inc | Columbus, OH 43212 | Oil Operator | Dec 1986 |
| 814 | Oil Enterprises | Logan, OH 43138 | Oil & Gas Operator | Dec 2017 |
| 815 | Oil Search Inc | Brookfield, OH 44403 | Oil & Gas Operator | Dec 2017 |
| 816 | Oiltech Inc | Yuba City, CA 95991 | Oil & Gas Operator | Dec 1984 |
| 817 | Oiltex, Inc. | Baltimore, MD 21221 | Oil & Gas Operator | Aug 2017 |
| 818 | Okmar Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 819 | Old South Oil LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2017 |
| 820 | Ole Miss Oil & Gas Inc | New Bremen, OH 45689 | Oil & Gas Operator | Dec 1985 |
| 821 | Olio Resources LLC | Arroyo Seco, NM 87514 | Oil & Gas Operator | Dec 2017 |
| 822 | Olympic Resources Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 823 | Omac Oil & Gas Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1990 |
| 824 | Omega Oil Corp | Lafayette, IN 47903 | Oil & Gas Operator | Dec 1987 |
| 825 | Orion Energy Corp | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 1984 |
| 826 | Orion Petro Corp | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2016 |
| 827 | Orr Robert W Jr | Zanesville, OH 43702-2683 | Oil & Gas Operator | Dec 2017 |
| 828 | Orwig Oil Company Inc | Brandenton, FL 34212 | Oil & Gas Operator | Dec 2017 |
| 829 | Osair Inc | Mentor, OH 44061 | Oil & Gas Operator | Dec 2016 |
| 830 | Otex Inc | N Canton, OH 44720 | Oil & Gas Operator | Dec 1988 |
| 831 | Oxford Oil | Zanesville, OH 43702-0910 | Oil & Gas Operator | Dec 2012 |
| 832 | P & D Valentine Oil Co | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2017 |
| 833 | P & S Energy Inc | Mineral Ridge, OH 44440 | Oil & Gas Operator | Dec 2017 |
| 834 | P & S Production LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2013 |
| 835 | P P & G Oil | Pickerington, OH 43147 | Oil & Gas Operator | Dec 2017 |
| 836 | P. D. L. Services, Inc. | Paris, OH 44669 | Oil & Gas Operator | Dec 2017 |
| 837 | Pac Drilling LLC | Bolivar, OH 44612 | Oil & Gas Operator | Dec 2017 |
| 838 | Pace Co/Chas E Hall | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 839 | Paragon Energy Co | Columbus, OH 43214 | Oil & Gas Operator | Dec 1989 |
| 840 | Parker Hannifin Corp | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2017 |
| 841 | Parkside Pet Of Ohio Inc | Granville, OH 43023 | Oil & Gas Operator | Dec 1987 |
| 842 | Paroco DRLG Funds Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 1993 |
| 843 | Parrot Energy Company | Cortland, OH 44410 | Oil & Gas Operator | Dec 2017 |
| 844 | Partners Oil Company | ***Crooksville, OH 43731 | Oil & Gas Operator | Aug 1995 |
| 845 | Partners Petroleum Inc | Independence, OH 44131 | Oil & Gas Operator | Dec 1988 |
| 846 | Paw Oil And Gas LTD | North Canton, OH 44720 | Oil & Gas Operator | Dec 2017 |
| 847 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Nov 2018 |
| 848 | PDQ Oil & Gas LLC | The Plains, OH 45780 | Oil & Gas Operator | Dec 2017 |
| 849 | Pedgeco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1984 |
| 850 | Pelican Producing Inc | Caldwell, OH 43724 | Oil & Gas Operator | Dec 1996 |
| 851 | Pemco Gas Inc | Indian Harbor B, FL 32937 | Oil & Gas Operator | Dec 1997 |
| 852 | Peninsula Group Inc | Peninsula, OH 44264 | Oil & Gas Operator | Dec 1991 |
| 853 | Peninsular Oil And Gas Co | Ada, MI 49301-96 | Oil & Gas Operator | Dec 1997 |
| 854 | Penn-Ohio Investment Corp. | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 2004 |
| 855 | Pennzenergy | Houston, TX 77252 | Oil & Gas Operator | Dec 1986 |
| 856 | Pep Drilling LLC | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2017 |
| 857 | Pepper Oil Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1992 |
| 858 | Peroco Oil & Gas | Killbuck, OH 44637 | Oil & Gas Operator | Dec 1987 |
| 859 | Pet Processors L.L.C | Painesville, OH 44077 | Oil & Gas Operator | Dec 2017 |
| 860 | Petro Drilling Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1993 |
| 861 | Petro Evaluation Serv Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2017 |
| 862 | Petro Quest Inc | Guysville, OH 45735 | Oil & Gas Operator | Dec 2017 |
| 863 | Petro-Mark, Inc. | St Petersburg, FL 33701 | Oil & Gas Operator | Dec 2017 |
| 864 | Petrocon Inc | Delaware, OH 43015-7147 | Oil & Gas Operator | Dec 2010 |
| 865 | Petroel | Marietta, OH 45750 | Oil & Gas Operator | Dec 2000 |
| 866 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 867 | Petrox, Inc | Streetsboro, OH 44241 | Oil & Gas Operator | Dec 2017 |
| 868 | Pettigrew Pumping Service Inc | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2017 |
| 869 | Phillips Exploration Inc | Warrendale, PA 15086 | Oil & Gas Operator | Dec 2012 |
| 870 | Phillips Margaret E | Newark, OH 43055 | Oil Operator | Dec 1993 |
| 871 | Phoenix NTL Petroleum Co | Englewood, NJ 7631 | Oil & Gas Operator | Dec 1990 |
| 872 | Piatt Enterprises LLC | Graysville, OH 45734 | Oil & Gas Operator | Dec 2017 |
| 873 | Pillar Energy, LLC | Charleston, WV 25330 | Oil & Gas Operator | Dec 2017 |
| 874 | Pilot Energy LLC | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2013 |
| 875 | Pin Oak Energy Partners LLC | Akron, OH 44308-1357 | Oil & Gas Operator | Nov 2018 |
| 876 | Pin Oak Petroleum Inc | Dallas, TX 75251 | Oil & Gas Operator | Dec 1989 |
| 877 | Pine Top Inc | Akron, OH 44313 | Oil & Gas Operator | Dec 2016 |
| 878 | Pineco | Laurelville, OH 43135 | Oil & Gas Operator | Dec 2017 |
| 879 | Pinevue Farms | Chillicothe, OH 45601 | Oil & Gas Operator | Dec 1993 |
| 880 | Pioneer Drilling Co | Payne, OH 45880 | Oil & Gas Operator | Dec 1993 |
| 881 | Pioneer Resources, Inc. | Phillipsburg, KS 67661 | Oil & Gas Operator | Oct 2018 |
| 882 | Pipes Pursie E | MT Vernon, IL 62864 | Oil & Gas Operator | Dec 2014 |
| 883 | Pittencrieff America, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2003 |
| 884 | Pleasant Hill Oil Co | Carrollton, OH 44615 | Oil Operator | Dec 2006 |
| 885 | Poling Albert | Logan, OH 43138 | Oil Operator | Dec 2017 |
| 886 | Pominex Inc | Cols, OH 43214 | Oil & Gas Operator | Dec 1988 |
| 887 | Ponderosa Consult Ser Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2017 |
| 888 | Poorboy Exploration LLC | Cumberland, OH 43732-9796 | Oil & Gas Operator | Dec 2017 |
| 889 | Portage Exploration Co In | Salem, IL 62881 | Oil & Gas Operator | Dec 2004 |
| 890 | Portage Resources Inc | Warren, OH 44484 | Oil & Gas Operator | Dec 2015 |
| 891 | Porter Brothers | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1995 |
| 892 | Porter Petroleum | Hopewell, OH 43746 | Oil & Gas Operator | Dec 2017 |
| 893 | Poston Operating Co Inc | Ashley, OH 43003 | Oil & Gas Operator | Dec 2003 |
| 894 | Pottmeyer David | Fleming, OH 43729 | Oil & Gas Operator | Dec 2017 |
| 895 | Power Gas Marketing & Trans | Akron, OH 44311-1057 | Oil & Gas Operator | Dec 2005 |
| 896 | Power Resour Oper Co Inc | Canton, OH 44718 | Oil & Gas Operator | Dec 2005 |
| 897 | Prime Time Energy Investment I | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 2017 |
| 898 | Proco | Wooster, OH 44691 | Oil Operator | Dec 1988 |
| 899 | Profit Energy Company | Jerusalem, OH 43747 | Oil & Gas Operator | Dec 2017 |
| 900 | Progressive Oil & Gas | Moxahala, OH 43761 | Oil & Gas Operator | Dec 2017 |