| COVE PETROLEUM CORPORATION | 18206 | TULSA | 1 | 1 |
| COVENANT OIL CORP | 13598 | BROKEN ARROW | 4 | 2 |
| COVENANT WELL SERVICE | 14017 | MARLOW | 0 | 0 |
| COVENTON ARROW ENERGY INC | 12160 | BLANCHARD | 4 | 2 |
| COVINGTON OIL COMPANY INCActive | 2990 | NICHOLS HILLS | 26 | 10 |
| COVY PETROLEUM | 13286 | SHAMROCK | 0 | 0 |
| COW CREEK RESOURCES INC | 21250 | PONCA CITY | 0 | 0 |
| COWBOY OIL & GAS | 21981 | BRISTOW | 1 | 1 |
| COWBOY OPERATING LLCActive | 22667 | OKLAHOMA CITY | 17 | 1 |
| COWBOY PIPELINE CO | 16409 | HOUSTON | 0 | 0 |
| COWDEN SR LESTER L | 2771 | OKLAHOMA CITY | 13 | 2 |
| COWLES JAMES CActive | 23025 | MUSKOGEE | 8 | 1 |
| COWLEY & HALLMARK | 20257 | NOBLE | 0 | 0 |
| COWPONY LLC | 23064 | ADA | 0 | 0 |
| COX BOBBY | 12328 | SHAWNEE | 1 | 1 |
| COX EDWIN L & R BERRY | 509 | DALLAS | 12 | 9 |
| COX ELMER N | 15457 | IRVING | 0 | 0 |
| COX EXPLORATION INC | 18602 | DALLAS | 12 | 3 |
| COX GAS CORPORATION | 21734 | DALLAS | 1 | 1 |
| COX JAMES D | 21907 | SEMINOLE | 0 | 0 |
| COX JIM OIL INC | 2924 | SEMINOLE | 17 | 2 |
| COX JOHN L | 5860 | MIDLAND | 71 | 24 |
| COX LINDA | 15124 | BRISTOW | 5 | 2 |
| COX OIL & GAS INC | 15571 | DALLAS | 19 | 9 |
| COX P D | 13044 | DRUMRIGHT | 0 | 0 |
| COX P D INC | 10924 | BRISTOW | 2 | 2 |
| COX PHYLLIS L | 13807 | BROKEN ARROW | 0 | 0 |
| COX RESOURCES CORPORATION | 19278 | DALLAS | 1 | 1 |
| COX RICHARD T | 18793 | SAPULPA | 0 | 0 |
| COX ROBERT L | 16495 | BLACKWELL | 0 | 0 |
| COX T L INVESTMENT INC | 16600 | TULSA | 0 | 0 |
| COYLE ROBERT J | 12321 | DUNEDIN | 0 | 0 |
| COYOTE N E LLC | 22531 | MARTIN | 0 | 0 |
| CPEX INC | 14386 | AMARILLO | 0 | 0 |
| CPRC INC | 19571 | TULSA | 16 | 1 |
| CPRP SERVICES LLCActive | 24506 | OKLAHOMA CITY | 27 | 3 |
| CPX ENERGY OPERATING, LLCActive | 25196 | Fort Worth | 0 | 0 |
| CRABTREE BARBARA T | 15707 | FORNEY | 0 | 0 |
| CRABTREE DALE E | 4717 | OKLAHOMA CITY | 2 | 1 |
| CRABTREE REBECCA | 23516 | ADA | 0 | 0 |
| CRAFT GLEN E | 7945 | BLACKWELL | 2 | 1 |
| CRAFT LOIS M | 17622 | LEQUIRE | 0 | 0 |
| CRAIG DARVIS M | 6046 | OKLAHOMA CITY | 0 | 0 |
| CRAIG ELDER OIL AND GAS LLC | 20621 | EDMOND | 49 | 3 |
| CRAIG MILO M | 4224 | RINGWOOD | 3 | 1 |
| CRAIG R D LLC | 21952 | DUNCAN | 0 | 0 |
| CRAIG TRUCKING INC | 14719 | KINGFISHER | 0 | 0 |
| CRAIN & DEISENROTH | 511 | TULSA | 25 | 7 |
| CRAIN & DEISENROTH LLC | 20885 | TULSA | 18 | 5 |
| CRAIN MINERALS LLC | 23432 | OKLAHOMA CITY | 0 | 0 |
| CRAINCO CORPORATION | 18103 | BINGER | 0 | 0 |
| CRAMER OIL LLCActive | 22597 | NOWATA | 11 | 1 |
| CRANE JAMES E | 22021 | BUFFALO | 0 | 0 |
| CRASCO OIL COMPANY | 4986 | TULSA | 10 | 2 |
| CRATON ENERGY CORPORATION | 21208 | HOUSTON | 0 | 0 |
| CRAW OPERATING LLCActive | 24649 | MOORELAND | 3 | 2 |
| CRAWFORD ROBERT E | 17006 | DEWEY | 0 | 0 |
| CRAWLEY ENTERPRISES INC | 13599 | DUSTIN | 0 | 0 |
| CRAWLEY PETROLEUM CORPORATIONActive | 7980 | OKLAHOMA CITY | 572 | 33 |
| CRB RESOURCES INCActive | 20626 | OKLAHOMA CITY | 31 | 4 |
| CRD INVESTMENTS LLC | 22579 | DUNCAN | 1 | 1 |
| CREATIVE ENERGY LLC | 21789 | OKMULGEE | 0 | 0 |
| CREEDE OIL & GAS COMPANY | 12666 | OKLAHOMA CITY | 2 | 1 |
| CREEK COUNTY DISPL SYSTEMS INC | 16758 | MOUNDS | 0 | 0 |
| CREEK COUNTY WELL SERVICE INC | 15614 | DRUMRIGHT | 2 | 1 |
| CREEK ELLIS | 517 | HASKELL | 0 | 0 |
| CREEL ENERGY COMPANY INC | 20819 | OKLAHOMA CITY | 1 | 1 |
| CREMER OIL & GAS CO INC | 12153 | LAWTON | 0 | 0 |
| CRENSHAW ALVIS GARY | 23373 | OKMULGEE | 1 | 1 |
| CRENSHAW LOUIE | 18716 | OKMULGEE | 0 | 0 |
| CRESAP SANDRA | 19826 | MACOMB | 0 | 0 |
| CRESCENDO RESOURCES L P | 20285 | AMARILLO | 16 | 4 |
| CRESCENT ENERGY PRODUCTION CO LLC | 20665 | EDMOND | 2 | 2 |
| CRESCENT EXPLORATION LLC | 19921 | EDMOND | 7 | 5 |
| CRESCENT TRANSPORTS INC | 14994 | CRESCENT | 0 | 0 |
| CREST RESOURCES INCActive | 20337 | TULSA | 51 | 19 |
| CRESTMARK PRODUCTION CORP. | 13037 | OKLAHOMA CITY | 0 | 0 |
| CRESTRIDGE RESOURCES INC | 17068 | STILLWATER | 1 | 1 |
| CREW B OPERATING, LLCActive | 24964 | OKMULGEE | 21 | 2 |
| CRICKET ENTERPRISES CORPORATION | 14426 | NOWATA | 7 | 2 |
| CRICKET PETROLEUM | 10000 | TULSA | 1 | 1 |
| CRIMSON ASSET HOLDINGS LLC | 24834 | HENNESSEY | 0 | 0 |
| CRIMSON ENERGY COMPANY LP | 20597 | FORT WORTH | 0 | 0 |
| CRISWELL ENERGY LLC | 22263 | MONTEZUMA | 8 | 3 |
| CRM LLC | 23397 | BARTLESVILLE | 0 | 0 |
| CROCKETT BROTHERS | 11237 | BROKEN ARROW | 0 | 0 |
| CROCKETT HOLLIS L | 11384 | BROKEN ARROW | 0 | 0 |
| CROCKETT JAMES J | 11988 | BROKEN ARROW | 0 | 0 |
| CROCKETT OIL AND GAS CO OF OK | 20323 | HOUSTON | 0 | 0 |
| CROCKETT PETROLEUM COMPANY | 17244 | TULSA | 0 | 0 |
| CROMER CARROLL OIL & GAS LLCActive | 23468 | KALISPELL | 16 | 4 |
| CROMLING DRILLING CO | 17354 | OKLAHOMA CITY | 3 | 2 |
| CRONOBLE JAMES M | 20014 | LAKEWOOD | 4 | 1 |
| CROOCH JOHN | 3022 | OKMULGEE | 5 | 1 |
| CROOKED OAK LLC dba CO ENERGY | 22819 | FORT WORTH | 0 | 0 |
| CROSE OIL COMPANYActive | 10281 | CLAREMORE | 80 | 3 |
| CROSS DON | 17994 | CUSHING | 0 | 0 |
| CROSS DOUBLE S | 23164 | NOWATA | 0 | 0 |
| CROSS ROBERTActive | 24927 | CUSHING | 0 | 0 |
| CROSS TIMBERS OPERATING CO | 18262 | OKLAHOMA CITY | 95 | 14 |
| CROSS TIMBERS PRODUCTION CO | 15805 | OKLAHOMA CITY | 14 | 11 |
| CROSSROADS PRODUCTION | 13191 | MOORE | 1 | 1 |
| CROUCH PETROLEUM COMPANY | 5265 | AMARILLO | 104 | 7 |
| CROW BILL dba CROW OIL LLCActive | 23820 | TULSA | 2 | 1 |
| CROW CREEK OPERATING CO III LLC | 22834 | TULSA | 8 | 3 |
| CROW DAVID | 20845 | ALLEN | 0 | 0 |
| CROW OIL LLC | 20392 | TULSA | 0 | 0 |
| CROW OPERATING LLC | 23285 | SAPULPA | 0 | 0 |
| CROWN CENTRAL PET CORP | 4845 | BELLAIRE | 6 | 6 |
| CROWN CONSULTING INC | 19973 | LIBERAL | 0 | 0 |
| CROWN ENERGY COMPANY | 14427 | BARTLESVILLE | 0 | 0 |
| CROWN ENERGY COMPANYActive | 19779 | OKLAHOMA CITY | 0 | 0 |
| CROWN EXPLORATION LLC | 21539 | TULSA | 9 | 5 |
| CROWN NATURAL GAS INC | 19991 | SILVER CITY | 1 | 1 |
| CROWN PETROLEUM COMPANY | 7911 | DUNCAN | 29 | 7 |
| CROWN WELL SERVICE | 13104 | JENKS | 1 | 1 |
| CRUDE EXPLORATION CORPORATION | 21163 | SEDONA | 1 | 1 |
| CRUDE RESOURCES | 13865 | SAPULPA | 28 | 3 |
| CRUDEWELL EXPLORATION LLC | 24660 | — | 0 | 0 |
| CRUMPTON H A | 4866 | DUNCAN | 2 | 1 |
| CRUSADER ENERGY CORPORATION | 21512 | FORT WORTH | 1 | 1 |
| CRUSADER ENERGY GROUP INC | 22359 | AUSTIN | 6 | 3 |
| CRUSADER ENERGY GROUP LLC | 21989 | OKLAHOMA CITY | 13 | 8 |
| CRUSADER ENERGY II LLC | 21738 | OKLAHOMA CITY | 1 | 1 |
| CRUSADER ENERGY III LLC | 21841 | OKLAHOMA CITY | 0 | 0 |
| CRUSHER OIL COMPANY | 20150 | PONCA CITY | 0 | 0 |
| CRUSTORE DEVELOPMENT LLCActive | 24176 | DALLAS | 94 | 5 |
| CRUTHIRD MARK OIL COMPANY | 20775 | GRANDFIELD | 0 | 0 |
| CRUTHIS GEORGE E | 21613 | CAVE CITY | 1 | 1 |
| CRUZ OIL & GAS INC | 19224 | EDMOND | 1 | 1 |
| CRUZEN DRILLING COMPANY INC | 20248 | CLEVELAND | 0 | 0 |
| CRYSTAL ENERGY INC | 19069 | OKLAHOMA CITY | 9 | 3 |
| CRYSTAL MOUNTAIN LLCActive | 22640 | OKLAHOMA CITY | 1 | 1 |
| CSODA OPERATING COMPANY LLC | 22987 | AMARILLO | 4 | 2 |
| CSX OIL & GAS CORPORATION | 15093 | HOUSTON | 6 | 4 |
| CUDD OPERATING CORP | 18433 | OKLAHOMA CITY | 1 | 1 |
| CUESTA PETROLEUM INC | 14397 | SHAWNEE | 14 | 3 |
| CUGAR OIL & GAS INC | 20965 | ENID | 1 | 1 |
| CULBREATH OIL & GAS CO INCActive | 20864 | TULSA | 82 | 8 |
| CULEBRA OIL & GAS LLC | 20970 | DALLAS | 2 | 1 |
| CULP & COPPLE OIL COMPANYActive | 534 | CUSHING | 26 | 5 |
| CULP FLOYD M & MARGARET A | 7509 | CLAREMORE | 2 | 1 |
| CULP JAY | 23214 | CUSHING | 0 | 0 |
| CULP RICHARD E | 14798 | TULSA | 0 | 0 |
| CUMA OIL COMPANY, INC | 5650 | OKLAHOMA CITY | 9 | 3 |
| CUMBERLAND OPERATING COMPANY | 536 | SEMINOLE | 25 | 7 |
| CUMMINGS OIL & CATTLE | 21056 | ADA | 0 | 0 |
| CUMMINGS OIL COMPANY | 5481 | OKLAHOMA CITY | 137 | 19 |
| CUMMINS BOBBY J | 20374 | DRUMRIGHT | 0 | 0 |
| CUMMINS OIL COMPANY INC | 14770 | TULSA | 2 | 1 |
| CUMMINS WREN OIL COMPANY | 2551 | TULSA | 3 | 1 |
| CUNDIFF HAROLDActive | 21749 | PERKINS | 8 | 1 |
| CUNDIFF JACK | 7092 | PERKINS | 1 | 1 |
| CUNDIFF JOHN | 22546 | ALLEN | 0 | 0 |
| CUR RIC PETROLEUM & GAS CORP | 5431 | MUSKOGEE | 3 | 1 |
| CURLECO INC | 12386 | OKLAHOMA CITY | 1 | 1 |
| CURN LISAActive | 22212 | STEUBENVILLE | 1 | 1 |
| CURRAN OIL CO | 4039 | GREAT FALLS | 2 | 2 |
| CURRENT ENERGY INC | 12375 | MORRIS | 1 | 1 |
| CURT'S EXPLORATION CO INC | 10243 | MUSKOGEE | 0 | 0 |
| CURTIS JEFF | 19440 | STONEWALL | 0 | 0 |
| CURZON OPERATING COMPANY LTDActive | 20269 | OKLAHOMA CITY | 17 | 9 |
| CUSCO ENERGIES INC | 22380 | THOMAS | 1 | 1 |
| CUSHING DISPOSAL INC | 15490 | PALM DESERT | 1 | 1 |
| CUSHING PRODUCTION COMPANY | 541 | STILLWATER | 0 | 0 |
| CUTBIRTH JACK INC | 4095 | ENID | 7 | 4 |
| CUTTING EDGE OIL & GAS LLCActive | 23513 | MORRISON | 9 | 2 |
| CW INVESTMENTS | 16328 | OKMULGEE | 64 | 5 |
| CWB ENERGY INC | 19625 | OKLAHOMA CITY | 1 | 1 |
| CWF ASSOCIATES LTD | 18161 | DALLAS | 0 | 0 |
| CWF ENERGY INC | 18477 | DALLAS | 2 | 1 |
| CWL INCActive | 24824 | EARLSBORO | 3 | 1 |
| CX DISPOSALS LLCActive | 23032 | MINCO | 3 | 2 |
| CXY ENERGY INC | 16147 | DALLAS | 0 | 0 |
| CYANOSTAR ENERGY INC | 17590 | TULSA | 5 | 2 |
| CYCLOPS OIL & GAS INC | 5216 | LAFAYETTE | 0 | 0 |
| CYGNUS OKLAHOMA OPERATING LLC | 21774 | HOUSTON | 1 | 1 |
| CYPERT OIL & GAS CO INC | 13161 | BROKEN ARROW | 22 | 1 |
| CYPRESS CREEK RESOURCES LLCActive | 24774 | OKLAHOMA CITY | 7 | 2 |
| CYPRESS EXPLORATION COMPANY | 16688 | TULSA | 15 | 5 |
| CYRUS EXPLORATION INC | 13713 | NORMAN | 1 | 1 |
| CZAR RESOURCES INC | 10621 | HOUSTON | 3 | 3 |
| D & B ENERGY INC | 12532 | CHANDLER | 2 | 1 |
| D & B JOHNSON FAMILY LLCActive | 11442 | OWASSO | 7 | 1 |
| D & B OIL | 20898 | DEWEY | 0 | 0 |
| D & B OIL COMPANY | 15634 | PAWHUSKA | 0 | 0 |
| D & B OIL COMPANY | 17555 | POOLEVILLE | 0 | 0 |
| D & B OPERATING INC | 18381 | MIDLAND | 3 | 2 |
| D & B OPERATING LLCActive | 23419 | RINGWOOD | 16 | 6 |
| D & C OIL COMPANY | 5691 | PAWHUSKA | 0 | 0 |
| D & D DRILLING | 15665 | KINGSTON | 4 | 3 |
| D & D ENERGY INC | 21197 | SAPULPA | 0 | 0 |
| D & D OIL COMPANY | 18306 | BROKEN ARROW | 1 | 1 |
| D & D OILFIELD SERVICES | 13973 | BIXBY | 0 | 0 |
| D & D OPERATING | 17894 | HENRYETTA | 0 | 0 |
| D & D PIPE & EQUIPMENT INC | 17314 | KINGFISHER | 151 | 24 |
| D & D PRODUCTION COMPANY | 7409 | MORRIS | 0 | 0 |
| D & D SERVICES | 19568 | CEMENT | 1 | 1 |
| D & E OIL CO | 21480 | HOLDENVILLE | 0 | 0 |
| D & E OIL COMPANY | 16393 | RAMONA | 7 | 1 |