| COLONY RESOURCES LP | 14128 | OWASSO | 0 | 0 |
| COLORADO GAS COMPRESSION INC | 6749 | LONGMONT | 7 | 3 |
| COLORADO INTERSTATE GAS CO | 458 | COLORADO SPRINGS | 5 | 1 |
| COLPITT BROTHERS OILActive | 11966 | COLLINSVILLE | 11 | 2 |
| COLPITT BROTHERS OPERATING COActive | 19313 | COLLINSVILLE | 27 | 3 |
| COLPITT C H DRILLING CO LLCActive | 21741 | COLLINSVILLE | 24 | 1 |
| COLPITT C H PRODUCTION CO | 14422 | TULSA | 0 | 0 |
| COLPITT CHAS H DRILLING CO | 461 | COLLINSVILLE | 9 | 1 |
| COLSON OIL LTD | 17570 | CORPUS CHRISTI | 0 | 0 |
| COLT OIL LLCActive | 21744 | SAPULPA | 6 | 1 |
| COLT RESOURCES CORPORATION | 18654 | BILLINGS | 11 | 8 |
| COLUMBIA PRODUCTION COMPANY | 18309 | OKLAHOMA CITY | 19 | 6 |
| COLUMBUS ENERGY LLC | 22171 | TULSA | 0 | 0 |
| COLUMBUS EXPLORATION INC | 14605 | OKLAHOMA CITY | 0 | 0 |
| COLUMBUS OIL COMPANYActive | 5690 | SEMINOLE | 84 | 3 |
| COLVIN LONNIE EUGENE | 11945 | OOLOGAH | 0 | 0 |
| COMANCHE EXPLORATION CO LLCActive | 20631 | OKLAHOMA CITY | 261 | 13 |
| COMANCHE EXPLORATION COMPANY | 18060 | OKLAHOMA CITY | 8 | 4 |
| COMANCHE OIL COMPANY | 16218 | DALLAS | 5 | 3 |
| COMANCHE PETROLEUM CORPORATIONActive | 14731 | Oklahoma City | 13 | 4 |
| COMANCHE PRODUCTION CO | 16669 | OKLAHOMA CITY | 1 | 1 |
| COMANCHE RESOURCES COMPANYActive | 18676 | OKLAHOMA CITY | 105 | 6 |
| COMBEST A L | 4870 | PURCELL | 0 | 0 |
| COMBINED ENERGY GROUP INC | 11611 | EDMOND | 6 | 4 |
| COMBINED RESOURCES CORPORATIONActive | 7775 | EDMOND | 263 | 24 |
| COMBINED SOUTHWESTERN FUNDING LLC | 15737 | AUSTIN | 2 | 2 |
| COMBS PRODUCTION LLCActive | 21889 | DEPEW | 2 | 1 |
| COMBS VERNON EActive | 23179 | BARTLESVILLE | 7 | 2 |
| COMET OIL COMPANY | 12147 | VELMA | 5 | 1 |
| COMET-HAINES OIL COMPANY | 16707 | SULPHUR | 3 | 2 |
| COMINCO AMERICAN INC | 8390 | AMARILLO | 8 | 1 |
| COMMAND ENERGY OPERATING LLCActive | 24630 | TULSA | 35 | 5 |
| COMMITTED WATER LLCActive | 24721 | — | 0 | 0 |
| COMPADRE DRILLING & EXPL CORP | 10197 | ARDMORE | 48 | 8 |
| COMPADRE OIL CORP | 475 | ARDMORE | 19 | 6 |
| COMPASS DRILLING INC | 18052 | ENID | 19 | 7 |
| COMPASS RESOURCES | 15128 | ENID | 17 | 6 |
| COMPLETE ENERGY SERVICES | 23705 | OKLAHOMA CITY | 0 | 0 |
| COMPLETE ENERGY SERVICES LLCActive | 22078 | Gainesville | 9 | 9 |
| COMPLETE OIL & GAS SERVICES LLCActive | 24726 | PERKINS | 56 | 12 |
| COMPLETE WELL SERVICE LLC | 22593 | HENNESSEY | 2 | 1 |
| COMPRESSOR SYSTEMS TULSA INC | 5721 | TULSA | 50 | 4 |
| COMPTON KELLY SOIL FARMING LLC | 23430 | WATONGA | 0 | 0 |
| COMSTOCK OIL AND GAS LP | 18305 | FRISCO | 15 | 11 |
| COMSTOCK PRODUCTION COMPANY | 6265 | NORMAN | 4 | 1 |
| CONCEPTS UNIQUE INC | 18368 | MEMPHIS | 0 | 0 |
| CONCHARTY OIL, INC.Active | 25178 | Bixby | 8 | 2 |
| CONCHO EXPLORATION INC | 13758 | OKLAHOMA CITY | 230 | 33 |
| CONCORD ENERGY INC | 13747 | FT WORTH | 1 | 1 |
| CONCORD PETROLEUM CO | 16785 | DAVIS | 0 | 0 |
| CONCORDE ENERGY INC | 11859 | OKLAHOMA CITY | 1 | 1 |
| CONCORDE RESOURCES CORPORATIONActive | 17310 | EUFAULA | 51 | 5 |
| CONDOR ENTERPRISES INC | 11676 | SHAWNEE | 27 | 1 |
| CONDRIN OIL 1985-A LTD | 14971 | TULSA | 7 | 3 |
| CONDRIN OIL COMPANY 1984-B LTD | 13300 | TULSA | 1 | 1 |
| CONFED OIL INC | 14981 | TULSA | 4 | 3 |
| CONFEDERATE BAY LLCActive | 23048 | OKEMAH | 11 | 2 |
| CONFEDERATE SPOOLING INC | 17465 | OKEMAH | 0 | 0 |
| CONGLETON VERN O | 22438 | REDDING | 1 | 1 |
| CONKLIN ROBERT L dba CONKLIN OIL LLCActive | 22374 | TULSA | 3 | 2 |
| CONNELL RALPH M | 477 | DALLAS | 0 | 0 |
| CONNER FAMILY LIMITED PARTNERSHIPActive | 10286 | HUMBLE | 3 | 1 |
| CONNER JELLY | 478 | SEMINOLE | 0 | 0 |
| CONNER PRODUCTION CO LLCActive | 18681 | SEMINOLE | 22 | 2 |
| CONOCO INC | 482 | ODESSA | 425 | 24 |
| CONOCOPHILLIPS COActive | 1701 | HOUSTON | 1,495 | 56 |
| CONQUEST OIL COMPANY | 18333 | GREELEY | 5 | 1 |
| CONSOLIDATED ENERGY | 14905 | TULSA | 0 | 0 |
| CONSOLIDATED EXPLORATION CO | 6811 | BROKEN ARROW | 12 | 3 |
| CONSOLIDATED OIL & GAS INC. | 480 | DENVER | 0 | 0 |
| CONSOLIDATED PETO EQUITY LTD | 15975 | LA CRESCENTA | 2 | 2 |
| CONSOLIDATED PRODUCTION INC.Active | 15696 | SEMINOLE | 64 | 2 |
| CONSOLIDATED PROPERTIES | 14842 | TULSA | 0 | 0 |
| CONSOLIDATED RESOURCES CORP | 18572 | SHAWNEE | 3 | 1 |
| CONTANGO MIDSTREAM COMPANY | 24435 | HOUSTON | 1 | 1 |
| CONTANGO RESOURCES LLCActive | 24432 | Houston | 275 | 19 |
| CONTINENTAL CRUDE CORPORATION | 14425 | TULSA | 0 | 0 |
| CONTINENTAL ENERGY | 21210 | GARDEN CITY | 0 | 0 |
| CONTINENTAL ENERGY OPERATING LLCActive | 24370 | TULSA | 65 | 1 |
| CONTINENTAL EXPLORATION LLC | 21863 | LONGVIEW | 5 | 2 |
| CONTINENTAL GAS INC | 17909 | ENID | 0 | 0 |
| CONTINENTAL LA ENERGY CORP | 11910 | OKLA. CITY | 0 | 0 |
| CONTINENTAL OIL & REFINING CO | 483 | CATOOSA | 69 | 8 |
| CONTINENTAL OPERATING CO | 18675 | HOUSTON | 19 | 13 |
| CONTINENTAL RESERVES OIL CO. | 16437 | BRIDGEPORT | 2 | 2 |
| CONTINENTAL RESOURCES INCActive | 3186 | OKLAHOMA CITY | 1,740 | 34 |
| CONTRACT GAS SERVICES INC | 12661 | OKLAHOMA CITY | 0 | 0 |
| CONTRACT OPERATING LLC | 22895 | ADA | 1 | 1 |
| CONTRERAS AL CONSULTANTS INC | 17723 | OKLAHOMA CITY | 3 | 2 |
| CONVEST ENERGY CORP | 12501 | HOUSTON | 0 | 0 |
| CONVEST ENERGY CORPORATION | 18195 | MIAMI | 6 | 4 |
| CONVEST PRODUCTION COMPANY | 17177 | HOUSTON | 1 | 1 |
| COOK (BRAD) OIL PROPERTIES | 11960 | TONKAWA | 0 | 0 |
| COOK ANTHONY E | 17930 | CORAOPOLIS | 1 | 1 |
| COOK ISAAC | 18160 | REDBIRD | 2 | 1 |
| COOK L D | 487 | BARTLESVILLE | 5 | 1 |
| COOK OIL COMPANYActive | 7286 | WEWOKA | 144 | 5 |
| COOK ROBERT L | 18978 | ROCKWALL | 21 | 2 |
| COOK RON E | 5231 | MANNFORD | 1 | 1 |
| COOK ROY W | 15274 | COLONY | 1 | 1 |
| COOK W R COMPANY | 492 | DUNCAN | 0 | 0 |
| COOK W R INC | 13118 | DUNCAN | 4 | 1 |
| COOK WILLIAM GLENN | 4442 | WEWOKA | 16 | 3 |
| COOKE COUNTY PRODUCTION COMPANY | 7935 | SHAWNEE | 6 | 1 |
| COOP ENERGY INC | 20616 | PERRYTON | 0 | 0 |
| COOPER D J OIL COMPANY | 11913 | STILLWATER | 0 | 0 |
| COOPER DAVY | 17706 | DRUMRIGHT | 0 | 0 |
| COOPER EXPLORATION INC | 12491 | BORGER | 0 | 0 |
| COOPER JOHN T | 4830 | DUNCAN | 0 | 0 |
| COOPER LISA L | 18184 | CUSHING | 1 | 1 |
| COOPER MINERAL GROUP INC | 16541 | BELLAIRE | 4 | 3 |
| COOPER OILActive | 16224 | COPAN | 3 | 2 |
| COOPER OIL COMPANY OF OKLAHOMA | 20063 | MCLOUD | 0 | 0 |
| COOPER OIL INC | 10186 | DUNCAN | 1 | 1 |
| COOPER OPERATING LLCActive | 24913 | Oklahoma City | 4 | 1 |
| COOPER PRODUCTION COMPANY | 19332 | GUN BARREL CITY | 0 | 0 |
| COPELAND BONNIE | 3202 | BEGGS | 0 | 0 |
| COPPAGE CARL E | 16599 | BROKEN ARROW | 1 | 1 |
| COPPERTOP DRILLING COMPANY | 12406 | ADA | 2 | 1 |
| COPPOCK HERB ENERGY | 15290 | FAIRVIEW | 0 | 0 |
| COPPOCK HERB ENERGY LLC | 22053 | WOODWARD | 1 | 1 |
| COQUINA OIL CORPORATION | 4933 | HOUSTON | 60 | 27 |
| CORAL PRODUCTION CORPORATION | 16562 | DENVER | 0 | 0 |
| CORBELL WAYNE LActive | 21300 | ARLINTON | 8 | 3 |
| CORDA CORPORATION | 21222 | DALLAS | 1 | 1 |
| CORDILLERA ENERGY PARTNERS II LLC | 21649 | GREENWOOD VILLAGE | 5 | 3 |
| CORDILLERA ENERGY PARTNERS III LLC | 22492 | GREENWOOD VILLAGE | 9 | 1 |
| CORDILLERA ENERGY PARTNERS LLC | 20943 | GREENWOOD VGL | 1 | 1 |
| CORDOVA OIL & GAS INC | 11332 | DALLAS | 1 | 1 |
| CORDOVA RESOURCES INC | 17123 | CLAREMORE | 0 | 0 |
| CORE OIL & GAS CORPORATION | 6989 | OKLAHOMA CITY | 4 | 3 |
| CORE PETROLEUM CO | 16962 | KINGSTON | 0 | 0 |
| CORE PETROLEUM LTD | 12129 | OKLAHOMA CITY | 2 | 2 |
| CORKERIN JOE D | 15113 | BEGGS | 0 | 0 |
| CORLENA OIL COMPANYActive | 23706 | AMARILLO | 3 | 2 |
| CORLETT CHARLES L | 17975 | VINITA | 0 | 0 |
| CORLEY BROTHERS OIL CO | 17044 | PAWHUSKA | 0 | 0 |
| CORLEY PRODUCTION COMPANY | 19162 | WILSON | 0 | 0 |
| CORLEY PRODUCTION INCActive | 21535 | COMANCHE | 23 | 1 |
| CORMAN JACK | 5962 | AUSTIN | 20 | 5 |
| CORMANY LAWANDA | 18688 | WILSON | 0 | 0 |
| CORNELIUS DALEActive | 22081 | WILLOW | 15 | 1 |
| CORNELIUS DOROTHY | 501 | SAPULPA | 0 | 0 |
| CORNELIUS OIL COMPANY | 8461 | KELLYVILLE | 12 | 1 |
| CORNELIUS OIL INCActive | 20342 | KELLYVILLE | 41 | 1 |
| CORNELIUS PHILLIP J & CONNIE | 6832 | KELLYVILLE | 1 | 1 |
| CORNELIUS TONYActive | 2829 | SAPULPA | 43 | 4 |
| CORNELL GLEN R | 7628 | PAULS VALLEY | 2 | 1 |
| CORNELL OIL COMPANY | 502 | DALLAS | 6 | 5 |
| CORNER ENERGY LLC | 20846 | OKLAHOMA CITY | 0 | 0 |
| CORNERSTONE E & P COMPANY LP | 22227 | IRVING | 4 | 2 |
| CORNERSTONE OIL & GAS | 19748 | KINGFISHER | 0 | 0 |
| CORNERSTONE OPERATING 220 LLC | 25005 | YUKON | 0 | 0 |
| CORNERSTONE OPERATING INC | 22547 | HOUSTON | 0 | 0 |
| CORNWELL ROY C | 20346 | OKMULGEE | 0 | 0 |
| CORONADO ENERGY PARTNERS LLCActive | 24734 | Tulsa | 11 | 1 |
| CORONADO GREAT PLAINS LLC | 22046 | TULSA | 37 | 2 |
| CORONADO OKLAHOMA LLC | 21852 | TULSA | 0 | 0 |
| CORONADO PETROLEUM CORPORATIONActive | 11762 | OKLAHOMA CITY | 67 | 11 |
| CORPORATE AMERICA RES INC | 12460 | BARTLESVILLE | 0 | 0 |
| CORTERRA ENERGY LLC | 23968 | TULSA | 0 | 0 |
| CORTERRA ENERGY OPERATING LLC | 23995 | TULSA | 5 | 1 |
| CORTEZ OPERATING COMPANY | 20365 | FORT WORTH | 1 | 1 |
| CORVETTE OIL & GAS COMPANY | 15939 | TULSA | 1 | 1 |
| CORVIN CRAIG | 21547 | JENKS | 0 | 0 |
| CORWIN B V | 4833 | CRESCENT | 2 | 2 |
| CORY KENNETH W | 13093 | BELLAIRE | 0 | 0 |
| COSMO INVESTMENTS LLC | 22371 | OKLAHOMA CITY | 0 | 0 |
| COSTILLA ENERGY INC | 20146 | MIDLAND | 0 | 0 |
| COSTILLA PETROLEUM CORP | 19648 | MIDLAND | 0 | 0 |
| COTERRA ENERGY OPERATING CO.Active | 21194 | Oklahoma City | 788 | 22 |
| COTNER M A | 4416 | KONAWA | 0 | 0 |
| COTNER M R | 10484 | ADA | 0 | 0 |
| COTTON COUNTY VENTURES | 10892 | ESTES PARK | 6 | 1 |
| COTTON PETROLEUM CORPORATION | 3434 | TULSA | 221 | 31 |
| COTTON VALLEY ENERGY INC | 20162 | OKLAHOMA CITY | 0 | 0 |
| COTTONMOUTH SWD LLCActive | 24157 | TULSA | 22 | 2 |
| COTTONTAIL OIL CORPORATION | 12777 | TULSA | 7 | 2 |
| COTTONWOOD OIL & GAS COMPANY | 21337 | IRVINE | 0 | 0 |
| COUBA OPERATING COMPANY | 19728 | OKLAHOMA CITY | 0 | 0 |
| COUCH DONALD WActive | 19149 | MARLOW | 31 | 4 |
| COUCH FRED J | 11651 | BROKEN ARROW | 3 | 1 |
| COUGAR ENERGY INVESTMENT LLC | 20611 | SPRING | 0 | 0 |
| COUGAR MGMT & LEASING CO INC | 14534 | LONGVIEW | 0 | 0 |
| COUGAR RESOURCES INC | 8764 | DRUMRIGHT | 1 | 1 |
| COUGHLIN PATRICK L & BARBARA | 13151 | TULSA | 0 | 0 |
| COULENDER JIM & BEVERLY | 20344 | TULSA | 1 | 1 |
| COUNCIL OAK RESOURCES LLC | 23853 | TULSA | 5 | 2 |
| COUNTRY CORNER | 14620 | OKMULGEE | 0 | 0 |
| COUNTY LINE STRIPPER WELLS LLCActive | 23899 | CHELSEA | 27 | 2 |
| COUNTYLINE DISPOSAL INC | 19036 | COUNTYLINE | 0 | 0 |
| COUNTYLINE PRODUCTION CO LLCActive | 21585 | DUNCAN | 8 | 1 |
| COUROIL INC | 14631 | PERRYTON | 6 | 3 |
| COURSON HAROLD D | 4681 | PERRYTON | 2 | 2 |
| COURSON OIL & GAS INCActive | 5535 | PERRYTON | 43 | 5 |
| COURTAULDS NORTH AMERICA INC | 16095 | MOBILE | 3 | 1 |
| COURTNEY ENVIR DISPOSAL INC | 19532 | OKLAHOMA CITY | 0 | 0 |
| COURTNEY JOHN H INC | 4395 | SEVERY | 0 | 0 |
| COURTNEY JR MAX I | 22316 | PONCA CITY | 2 | 1 |
| COUSINS EXPLORATION CO | 10693 | WICHITA FALLS | 1 | 1 |