| 1001 | R E Gas Development LLC | State College, PA 16801 | Oil & Gas Operator | Sep 2018 |
| 1002 | R H Penick Co LTD | Baltimore, OH 43105 | Oil & Gas Operator | Dec 2024 |
| 1003 | R I G Drilling Inc | Fredericktown, OH 43019 | Oil & Gas Operator | Dec 1993 |
| 1004 | R Wolfe Oil & Gas LLC | Athens, OH 45701 | Oil & Gas Operator | Dec 2024 |
| 1005 | R. D. Wiles, Inc. | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 1006 | Rab Oil & Gas LLC | Garrettsville, OH 44231 | Oil & Gas Operator | Dec 2024 |
| 1007 | Rainbow Oil & Gas LLC | Coolville, OH 45723 | Oil & Gas Operator | Dec 2024 |
| 1008 | Ralph E Shorts Drilling | Polk, OH 44866 | Oil & Gas Operator | Dec 2024 |
| 1009 | Ramah Oil Company LLC | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 2007 |
| 1010 | Randell Oil Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 1011 | Range Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2000 |
| 1012 | Range Resources Appalachia LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Oct 2025 |
| 1013 | Ray Pander Trucking Inc | Bolivar, OH 44612 | Oil & Gas Operator | Dec 1998 |
| 1014 | Red Bird Producing Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 1015 | Red Man Oil, Co. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 1016 | Redco, Inc. | Columbus, OH 43229 | Oil & Gas Operator | Dec 1998 |
| 1017 | Redman E C /Redman Oil Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 2002 |
| 1018 | Rednet Exploration LLC | Nashport, OH 43830 | Oil Operator | Dec 2024 |
| 1019 | Reed Kenneth E | Burbank, OH 44214 | Oil & Gas Operator | Dec 1993 |
| 1020 | Reinke Brad L | Chardon, OH 44024 | Oil & Gas Operator | Dec 2024 |
| 1021 | Reliance Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 1022 | Reliance Oil Corp | Charlottesville, VA 22906 | Oil & Gas Operator | Dec 1988 |
| 1023 | Rennolds Resources LLC | West Farmington, OH 44491 | Oil & Gas Operator | Dec 2024 |
| 1024 | Rent A Home Inc | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2024 |
| 1025 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 1026 | Resource America Inc | Uniontown, OH 44685 | Oil & Gas Operator | Dec 2011 |
| 1027 | Resource Production Inc | Bridgeport, CT 06604 | Oil & Gas Operator | Dec 1993 |
| 1028 | RHDK Oil & Gas LLC/Dba Red Hill | Dover, OH 44622-9801 | Oil & Gas Operator | Dec 2024 |
| 1029 | Rhine Oil Co LLC | Dalton, OH 44618 | Oil & Gas Operator | Dec 1999 |
| 1030 | Rice Drilling D LLC | Canonsburg, PA 15317 | Oil & Gas Operator | Sep 2025 |
| 1031 | Ridge Oil And Gas Inc | Zanesville, OH 43702-2534 | Oil & Gas Operator | Dec 2024 |
| 1032 | Ridgeway Resources | Barberton, OH 44203 | Oil & Gas Operator | Dec 2012 |
| 1033 | Ridgway Realty & Land Inc | University Heights, OH 44118-3818 | Oil & Gas Operator | Dec 2019 |
| 1034 | Rinard Petroleum LLC | Marietta, OH 45750 | Oil & Gas Operator | Dec 2023 |
| 1035 | River Gas Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 1036 | River Valley Energy Inc | Little Hocking, OH 45742 | Oil & Gas Operator | Dec 2024 |
| 1037 | Riverside Petroleum & Prod. | Oxford, MS 38655 | Oil & Gas Operator | Dec 2023 |
| 1038 | RMB Corporation | Senecaville, OH 43780 | Oil & Gas Operator | Dec 2016 |
| 1039 | Rmi Company | Niles, OH 44446 | Oil & Gas Operator | Dec 1984 |
| 1040 | Rocanville Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 1041 | Rockwell Resources Inc | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 1042 | Rod Johnson Operations | Miramar Beach, FL 32550 | Oil & Gas Operator | Dec 2015 |
| 1043 | Roma Oil & Gas LLC | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2024 |
| 1044 | Roman Well Services Inc | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2023 |
| 1045 | Ronald A Gibson & Assoc Inc | Avon Lake, OH 44012 | Oil & Gas Operator | Dec 2024 |
| 1046 | Roscoe Gas & Oil Co | Dover, OH 44622 | Oil & Gas Operator | Dec 1991 |
| 1047 | Roulette Energy LLC | Canal Wincheste, OH 43110 | Oil & Gas Operator | Dec 2023 |
| 1048 | Royal Petroleum Prop Inc | Woodville, OH 43469 | Oil & Gas Operator | Dec 1990 |
| 1049 | Royalton Gas & Oil Co | Brunswick, OH 44212 | Oil & Gas Operator | Dec 1990 |
| 1050 | RPJ Fund Management Inc | St. Paul, MN 55101 | Oil & Gas Operator | Dec 1991 |
| 1051 | RRKK LLC | Columbus, OH 43214-3072 | Oil Operator | Dec 2024 |
| 1052 | RSC Energy Corp | Brooklyn HTS, OH 44109 | Oil & Gas Operator | Dec 1984 |
| 1053 | Rubber City Oil & Gas LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 1054 | Ruffner Petroleum Corp | Akron, OH 44308 | Oil & Gas Operator | Dec 2000 |
| 1055 | Russell E Snider LLC | Newark, OH 43055 | Oil Operator | Dec 2024 |
| 1056 | S & R Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 1993 |
| 1057 | S & S Energy Corp | Henderson, NV 89052 | Oil & Gas Operator | Dec 2016 |
| 1058 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 1059 | S S S Energy Co | Stow, OH 44224 | Oil & Gas Operator | Dec 1989 |
| 1060 | Sabre Energy Corporation | Lore City,, OH 43755 | Oil & Gas Operator | Dec 2017 |
| 1061 | Sage Energy Inc | Dublin, OH 43017 | Oil & Gas Operator | Dec 1988 |
| 1062 | Salt Creek Enterprises LLC | Chandlersville, OH 43727-9604 | Oil & Gas Operator | Dec 2024 |
| 1063 | Salt Creek JT Venture | Pittsburgh, PA 15219-2702 | Oil & Gas Operator | Dec 1986 |
| 1064 | Samples James F | Brinkhaven, OH 43006 | Oil & Gas Operator | Dec 2021 |
| 1065 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 1066 | Sandbar Oil & Gas Co | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2024 |
| 1067 | Sandy Supply Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2014 |
| 1068 | Sanor Bruce | Salem, OH 44460 | Oil & Gas Operator | Dec 2024 |
| 1069 | Sara Jenny Energy Inc | Chesterland, OH 44026 | Oil & Gas Operator | Dec 2024 |
| 1070 | Sardis Gas, LLC | Mineral Wells, WV 26150 | Oil & Gas Operator | Dec 2024 |
| 1071 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | Oct 2025 |
| 1072 | Scandia Energy Co Inc | Traverse City, MI 49684 | Oil & Gas Operator | Dec 1993 |
| 1073 | Schmelzer Mark | Rushville, OH 43150 | Oil & Gas Operator | Dec 2007 |
| 1074 | Schmelzer Maurice | Bremen, OH 43107 | Oil & Gas Operator | Dec 2024 |
| 1075 | Schmelzer Plugging LLC | Bremen, OH 43107 | Oil & Gas Operator | Dec 2024 |
| 1076 | Schreiner Oil & Gas Inc | Prescott, AZ 86303 | Oil & Gas Operator | Dec 2023 |
| 1077 | Schrimsher Oil & Gas Expl | Orlando, FL 32803 | Oil & Gas Operator | Dec 1992 |
| 1078 | Schultheis Oil & Gas | Whipple, OH 45780 | Oil & Gas Operator | Dec 2023 |
| 1079 | Schwanco Inc | Cleveland, OH 44115 | Oil & Gas Operator | Dec 1987 |
| 1080 | Schweder Richard E | Lakeville, OH 44638 | Oil & Gas Operator | Dec 2009 |
| 1081 | Scion Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2019 |
| 1082 | Scrimgeour Robert | Sterling, VA 22170 | Oil & Gas Operator | Dec 1991 |
| 1083 | Seagull Development Corp | Massillon, OH 44646-7436 | Oil & Gas Operator | Dec 2015 |
| 1084 | Second Oil LTD | McCdlue, OH 43534 | Oil & Gas Operator | Dec 2024 |
| 1085 | Seibert Darrel L/Chestnut | Cuyahoga Falls, OH 44224 | Oil & Gas Operator | Dec 1994 |
| 1086 | Seibert Oil & Gas | Hudson, OH 44236-4430 | Oil & Gas Operator | Dec 1999 |
| 1087 | Seifert Companies LTD | Bremen, OH 43107 | Oil & Gas Operator | Dec 2023 |
| 1088 | Select Energy Investments Inc | Solon, OH 44139 | Oil & Gas Operator | Dec 2019 |
| 1089 | Seneca Energy Corporation | Dover, OH 44622 | Oil & Gas Operator | Dec 2020 |
| 1090 | Seven To One Oil & Gas LLC | Magnolia, OH 44643 | Oil & Gas Operator | Dec 2024 |
| 1091 | Shackelford Oil Co | Midland, TX 79707 | Oil & Gas Operator | Nov 2025 |
| 1092 | Shafer Berman J | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 1093 | Shafer David Oil Prod Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2000 |
| 1094 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Oct 2025 |
| 1095 | Shanahan Donald P | Ridgedale, MO 65739 | Oil & Gas Operator | Dec 1990 |
| 1096 | Sherman Michael | Canton, OH 44735 | Oil & Gas Operator | Dec 2007 |
| 1097 | Shongum Oil & Gas Inc | Akron, OH 44312 | Oil & Gas Operator | Dec 2011 |
| 1098 | Shrider W E Co | Newark, OH 43055 | Oil & Gas Operator | Dec 1991 |
| 1099 | Sidwell Theodore R Jr | Thornville, OH 43076 | Oil & Gas Operator | Dec 1988 |
| 1100 | Simpson B T Jr | Orlando, FL 32806 | Oil & Gas Operator | Dec 1986 |