| CANOK INTERNATIONAL INCActive | 16202 | OKMULGEE | 120 | 9 |
| CANTRELL ENERGY CORPORATIONActive | 20793 | ADA | 528 | 8 |
| CANTRELL ROBERT RActive | 17498 | ADA | 173 | 3 |
| CANVAS ENERGY LLCActive | 16896 | OKLAHOMA CITY | 579 | 43 |
| CANYON CREEK ENERGY ARKOMA LLCActive | 24379 | TULSA | 68 | 3 |
| CANYON CREEK ENERGY OPERATING LLC | 23443 | TULSA | 9 | 3 |
| CANYON CREEK RESOURCES LLC | 23115 | TULSA | 0 | 0 |
| CANYON EXPLORATION COMPANY | 16597 | AMARILLO | 30 | 13 |
| CANYON RESOURCES INC | 14456 | OKLAHOMA CITY | 0 | 0 |
| CANYON RESOURCES INC | 14769 | OKLAHOMA CITY | 0 | 0 |
| CAP LIMITED | 13284 | OKLAHOMA CITY | 0 | 0 |
| CAP OIL COMPANYActive | 19838 | ADA | 86 | 2 |
| CAPATAZ OPERATING INC | 18888 | MIDLAND | 2 | 1 |
| CAPCO OIL COMPANY | 21670 | IRVING | 0 | 0 |
| CAPITAL PET & INVESTMENTS INC | 20200 | OKLAHOMA CITY | 3 | 1 |
| CAPITAL PROGRAMS COMPANY INC | 17053 | ADDISON | 1 | 1 |
| CAPITOL EXPLORATION INC | 11796 | OKLAHOMA CITY | 0 | 0 |
| CAPITOL WELL SERVICING COMPANY | 4629 | ARCADIA | 23 | 8 |
| CAPMAC INC | 13195 | TULSA | 15 | 7 |
| CAPOCO | 21293 | OKMULGEE | 0 | 0 |
| CAPPS JONATHAN D & JUSTIN W BACONActive | 21635 | OKTAHA | 1 | 1 |
| CAPROCK ENTERPRISE LLC | 22144 | FAIRVIEW | 0 | 0 |
| CAPROCK INC | 16099 | DUNCAN | 7 | 2 |
| CAPSTONE CRUDE COMPANY | 19711 | TULSA | 0 | 0 |
| CAPSTONE ENERGY INC | 19406 | OKLAHOMA CITY | 1 | 1 |
| CAPSTONE ENERGY LLC | 21864 | EDMOND | 1 | 1 |
| CAPSTONE OIL & GAS LLCActive | 19530 | HENNESSEY | 36 | 8 |
| CAPSTONE OILFIELD DISPOSAL SERVICE LLCActive | 21455 | HENNESSEY | 2 | 1 |
| CAPTUREPOINT LLCActive | 24125 | ALLEN | 178 | 2 |
| CAR-CON DEVELOPMENT INC | 6022 | TULSA | 15 | 1 |
| CAR-ELL INC | 14389 | BROKEN ARROW | 0 | 0 |
| CAR-GEN PRODUCTION INC | 11260 | BILLINGS | 2 | 2 |
| CAR-JER INC | 14458 | OKLAHOMA CITY | 0 | 0 |
| CARBON ECONOMY LLC | 21404 | CORDELL | 3 | 2 |
| CARBON RIDGE ENERGY LLCActive | 23695 | NORMAN | 16 | 5 |
| CARDIFF RESOURCES INC | 15668 | EDMOND | 0 | 0 |
| CARDINAL ENGINEERING | 23068 | TULSA | 0 | 0 |
| CARDINAL OIL & GAS INC | 15925 | OKLAHOMA CITY | 0 | 0 |
| CARDINAL OIL LLCActive | 22037 | Drumright | 26 | 4 |
| CARDINAL OPERATING COMPANY | 14460 | TULSA | 0 | 0 |
| CARDINAL RIVER OPERATING LLCActive | 24398 | OKLAHOMA CITY | 25 | 1 |
| CAREY GAS COMPANY | 17119 | OKLAHOMA CITY | 43 | 2 |
| CAREY JOHN OIL CO INC | 13294 | DES MOINES | 0 | 0 |
| CARIBOU ENERGY INC | 15530 | AURORA | 0 | 0 |
| CARIKER OIL & GAS COMPANY | 7645 | MOUNDS | 0 | 0 |
| CARL E GUNGOLL EXPLORATION INC | 16126 | OKLAHOMA CITY | 56 | 16 |
| CARL E GUNGOLL EXPLORATION LLCActive | 21261 | OKLAHOMA CITY | 38 | 13 |
| CARL HUMPHRIES INC | 20824 | PIEDMONT | 47 | 12 |
| CARLA ENERGY CORPORATION | 14618 | OKLAHOMA CITY | 2 | 2 |
| CARLIN OIL AND GAS COMPANY | 16382 | TULSA | 2 | 2 |
| CARLOW CORP | 19114 | MIDLAND | 0 | 0 |
| CARLS' WELL SERVICE | 13035 | KELLYVILLE | 0 | 0 |
| CARLSON PETROLEUM COMPANY | 4774 | MOBILE | 6 | 5 |
| CARLSON-TURNER DOROTHY J | 20194 | ELGIN | 0 | 0 |
| CARLYLE EXPLORATION INC | 14384 | OKLAHOMA CITY | 0 | 0 |
| CARLYLE PETROLEUM INC | 11791 | MIDLAND | 2 | 2 |
| CARMAC ENERGY COMPANY LLCActive | 24320 | Shawnee | 10 | 1 |
| CARMAC ENERGY CORPORATION | 15768 | DALLAS | 63 | 8 |
| CARMAN FRANCES J | 17897 | PAWHUSKA | 0 | 0 |
| CARMAN ROBERT W | 20982 | BRISTOW | 0 | 0 |
| CARMEN ACQUISITION LLC | 21132 | OKLAHOMA CITY | 0 | 0 |
| CARMEN FIELD LP | 16215 | TULSA | 11 | 5 |
| CARMICHAEL OIL & GAS COMPANYActive | 13130 | VALLEJO | 6 | 2 |
| CARMONT OIL | 14038 | LONE GROVE | 2 | 1 |
| CARNES PETROLEUM CORPORATIONActive | 7719 | CLEVELAND | 11 | 1 |
| CARNEY MARK C & KAREN M | 17513 | DALLAS | 2 | 1 |
| CAROL JO DUNEGANActive | 24594 | BRISTOW | 1 | 1 |
| CAROLINA OIL COMPANY | 14875 | JENNINGS | 0 | 0 |
| CARPENTER & ASSOCIATES LTD | 7676 | TULSA | 29 | 8 |
| CARPENTER DISPOSAL WELL INC | 18168 | SKIATOOK | 0 | 0 |
| CARPENTER LUTHER | 18095 | SKIATOOK | 1 | 1 |
| CARPENTER R L | 364 | SAPULPA | 22 | 1 |
| CARR EXPLORATION CORPORATION | 13746 | DALLAS | 6 | 3 |
| CARR LOY | 13740 | CUSHING | 1 | 1 |
| CARR PRODUCTION COMPANY LLC | 19714 | OKLAHOMA CITY | 0 | 0 |
| CARR SCOTT OPERATING ACCT | 16956 | WICHITA FALLS | 0 | 0 |
| CARR W C | 8753 | GOTEBO | 1 | 1 |
| CARRERA ENERGY LLC | 23514 | MIDLAND | 6 | 3 |
| CARRIKER RESOURCES | 13289 | WILSON | 1 | 1 |
| CARROLL D E & S F | 366 | DUNCAN | 0 | 0 |
| CARROLL GLADYS | 14390 | DUNCAN | 0 | 0 |
| CARROLL HERBERT B & JOANN S | 13634 | BARTLESVILLE | 0 | 0 |
| CARROLL M R DBA CARROLL PRODUCTION COMPANY | 2657 | TULSA | 3 | 2 |
| CARRUTH DAVID C FAMILY TRUST | 5666 | RUSSELLVILLE | 5 | 1 |
| CARSON BUCKLES EXPLORATION LLC | 24431 | AMARILLO | 0 | 0 |
| CARSON PETROLEUM CORP | 6756 | OKLAHOMA CITY | 0 | 0 |
| CARTER & SON SERVICE | 15872 | BILLINGS | 0 | 0 |
| CARTER B R | 7617 | TULSA | 0 | 0 |
| CARTER BILL | 4534 | COWETA | 0 | 0 |
| CARTER COUNTY SALT WATER DISPOSAL INCActive | 21119 | WILSON | 3 | 2 |
| CARTER DONALD L | 11865 | SAND SPRINGS | 4 | 1 |
| CARTER EVERETT N | 4640 | DAVIS | 1 | 1 |
| CARTER J E ENERGY & DEV CORP | 15314 | HOUSTON | 0 | 0 |
| CARTER JACK | 11889 | BARTLESVILLE | 0 | 0 |
| CARTER JAMES J | 14391 | CHELSEA | 0 | 0 |
| CARTER KENNETH G & LILLIA | 22858 | LONG BEACH | 0 | 0 |
| CARTER L K | 20295 | TULSA | 0 | 0 |
| CARTER PRESTON DRILLING CO | 2550 | DAVIS | 7 | 5 |
| CARTER W D | 14392 | LANGLEY | 0 | 0 |
| CARTER W H & E G HALSTEAD | 6846 | BEGGS | 0 | 0 |
| CARTER W H IRREVOCABLE TRUST | 17905 | OKLAHOMA CITY | 1 | 1 |
| CARTER W H TRUSTEE | 2158 | OKLAHOMA CITY | 0 | 0 |
| CARTER WILLIE H | 6005 | BEGGS | 0 | 0 |
| CARTLEDGE & CARTLEDGE OIL COMPANY INCActive | 11750 | KIEFER | 186 | 4 |
| CARTLEDGE ENERGY LLCActive | 24087 | SAPULPA | 170 | 3 |
| CARUTHERS CONSULTING INC | 22538 | FORT WORTH | 0 | 0 |
| CARVER HARRY | 370 | OKLAHOMA CITY | 2 | 1 |
| CASA GRANDE EXPLORATION COMPANYActive | 22885 | Casa Grande | 6 | 1 |
| CASCADE ENERGY INVESTMENTS INC | 21401 | LINDSAY | 1 | 1 |
| CASCADE ENERGY PARTNERS LLC | 22854 | FEDERAL WAY | 0 | 0 |
| CASCO ENERGY LC | 19326 | DENISON | 1 | 1 |
| CASCO PRODUCTION INC | 12535 | SHREVEPORT | 5 | 3 |
| CASE LONNIE | 21426 | BURKBURNETT | 0 | 0 |
| CASE PRATT CLARA JANE | 20912 | YUKON | 1 | 1 |
| CASE SALES COMPANY INCActive | 11951 | TONKAWA | 12 | 2 |
| CASEY CLAYTON | 15878 | HENNEPIN | 0 | 0 |
| CASEY DAVID | 14600 | HENNEPIN | 0 | 0 |
| CASEY MUSGROVE OIL COMPANY INCActive | 21423 | TULSA | 48 | 3 |
| CASEY OIL CO | 18255 | HENNEPIN | 0 | 0 |
| CASH COMPANY | 7448 | LAMAR | 6 | 1 |
| CASH JERRY PROPERTIES INC | 14811 | SHAWNEE | 1 | 1 |
| CASH OIL INC | 23648 | ALLEN | 0 | 0 |
| CASILLAS OPERATING LLC | 23838 | TULSA | 1 | 1 |
| CASILLAS PETROLEUM CORPActive | 17728 | TULSA | 188 | 16 |
| CASLIN ENERGY COMPANY | 15424 | BARTLESVILLE | 2 | 1 |
| CASON WILLIAM J | 20359 | SANTEE | 0 | 0 |
| CASPEN OIL INC | 4473 | LAKEWOOD | 4 | 1 |
| CASS BRYAN | 18324 | BARTLESVILLE | 0 | 0 |
| CASSELMAN CHARLES JACK | 3214 | OKMULGEE | 14 | 3 |
| CASSELMAN GEORGE H | 375 | MORRIS | 0 | 0 |
| CASSELMAN LEASES LLCActive | 2451 | MORRIS | 27 | 3 |
| CASSELMAN RONALD HActive | 21679 | MORRIS | 31 | 2 |
| CASSELMAN-SHEELY | 7576 | EMPORIA | 5 | 1 |
| CASSIDY JR JOHN | 378 | STROUD | 15 | 3 |
| CASTELL OPERATING COMPANY LLC | 24151 | OKLAHOMA CITY | 2 | 1 |
| CASTELLA INCActive | 21740 | BARTLESVILLE | 105 | 3 |
| CASTELLI ENERGY LLCActive | 24674 | OKLAHOMA CITY | 3 | 1 |
| CASTELLI EXPLORATION INC | 18891 | OKLAHOMA CITY | 9 | 6 |
| CASTLE EXPLORATION COMPANY INC | 20605 | BLUE BELL | 2 | 2 |
| CASTLE EXPLORATION INC | 14393 | OKLAHOMA CITY | 4 | 4 |
| CASTLE OPERATING LLCActive | 24308 | OKLAHOMA CITY | 0 | 0 |
| CASTLE ROCK PETROLEUM INC | 18466 | TULSA | 1 | 1 |
| CASTLEMAN JR JOHN P | 5832 | DALLAS | 0 | 0 |
| CASTLEROCK RESOURCES INC | 18524 | OKLAHOMA CITY | 1 | 1 |
| CATCO ENERGY INC | 15674 | YUKON | 0 | 0 |
| CATES BETTY J | 17741 | TULSA | 0 | 0 |
| CATES BYRON | 18653 | HOLDENVILLE | 1 | 1 |
| CATES BYRON KActive | 25065 | HOLDENVILLE | 1 | 1 |
| CATES DON G | 12183 | TULSA | 0 | 0 |
| CATHEY PRODUCTION COMPANY | 7321 | RYAN | 5 | 2 |
| CATHY OIL & GAS CO. LLCActive | 25139 | BLACKWELL | 4 | 1 |
| CATI RESOURCES LLC | 24003 | EUREKA | 0 | 0 |
| CAVU ENERGY SERVICES INC | 22422 | TULSA | 51 | 7 |
| CAY ENERGY CORP | 17735 | NORMAN | 0 | 0 |
| CAYMAN EXPLORATION CORP | 3951 | TULSA | 9 | 6 |
| CAYMAN RESOURCES CORPORATION | 13438 | TULSA | 1 | 1 |
| CB OIL COMPANY | 20487 | KINGFISHER | 1 | 1 |
| CBAC ENERGY | 19281 | BROKEN ARROW | 1 | 1 |
| CBL RESOURCES LLC | 21960 | TULSA | 5 | 3 |
| CBM GAS COMPANY LLC | 21569 | DEWEY | 6 | 2 |
| CBM OPERATING LLC | 22409 | TULSA | 1 | 1 |
| CBM OPERATORS LLC | 20279 | DALLAS | 0 | 0 |
| CBM TECHNOLOGIES LLC | 20225 | DALLAS | 0 | 0 |
| CBO OIL AND GAS, LLCActive | 23717 | STILLWATER | 69 | 3 |
| CBS DISPOSAL LLC | 21593 | KINGFISHER | 0 | 0 |
| CBS ENERGY LLCActive | 21801 | OKLAHOMA CITY | 15 | 3 |
| CCCS ENERGY LLC | 22993 | RINGLING | 0 | 0 |
| CCF EXPLORATION AND PRODUCTION LLC | 22955 | PERRY | 1 | 1 |
| CCG OPERATING LLCActive | 25127 | Hennessey | 2 | 2 |
| CCI GULF COAST UPSTREAM LLC | 23276 | HOUSTON | 0 | 0 |
| CCS INVESTMENTS INC | 18467 | BARTLESVILLE | 0 | 0 |
| CDD GAS COMPANY USA INC | 18595 | HOUSTON | 0 | 0 |
| CDG INC | 21225 | SAPULPA | 0 | 0 |
| CDJINC LLC | 23141 | HARRAH | 0 | 0 |
| CDS OIL COMPANY | 20001 | TULSA | 42 | 11 |
| CECIL GLEN S | 6962 | EDMOND | 0 | 0 |
| CECIL GLENN S TRUST | 18422 | EDMOND | 0 | 0 |
| CECIL RAY KEESEE 1994 REV FAMILY TRUSTActive | 25142 | Oklahoma City | 1 | 1 |
| CECIL RESOURCES CORPORATION | 12602 | DENVER | 5 | 2 |
| CEDAR CANYON RESOURCES INC | 22763 | CASHION | 2 | 1 |
| CEDAR OIL COMPANY | 5354 | PURCELL | 0 | 0 |
| CEDAR POINT INC | 14394 | SAND SRINGS | 0 | 0 |
| CEDAR RIDGE ENERGIES LLC | 21637 | PAWNEE | 0 | 0 |
| CEDARDALE OPERATING LLC | 21499 | WOODWARD | 0 | 0 |
| CEI OPERATING LLC | 23980 | HOUSTON | 1 | 1 |
| CEI PETROLEUM INC | 18519 | TULSA | 5 | 3 |
| CEJA CORPORATIONActive | 1618 | TULSA | 37 | 5 |
| CELERO ENERGY LP | 21568 | MIDLAND | 4 | 1 |
| CELERON OIL & GAS COMPANY | 11918 | LAFAYETTE | 2 | 2 |
| CEMENT OIL COMPANYActive | 19381 | CEMENT | 44 | 2 |
| CEMOIL INCActive | 20924 | CEMENT | 273 | 4 |
| CENCO INC | 18369 | EL DORADO | 0 | 0 |
| CENDRA LTD | 15439 | BRISTOW | 0 | 0 |
| CENERGY EXPLORATION COMPANY | 6373 | DALLAS | 0 | 0 |
| CENPAT OPERATING LLC | 21784 | HOUSTON | 1 | 1 |
| CENTAUR RESOURCES INCActive | 15345 | OKLAHOMA CITY | 37 | 5 |
| CENTENNIAL PETROLEUM INC | 10210 | DENVER | 0 | 0 |
| CENTENNIAL RESOURCES INC | 13075 | DRUMRIGHT | 8 | 2 |
| CENTER OIL COMPANY | 4593 | ADA | 4 | 1 |
| CENTER PRODUCTION COMPANY LLCActive | 21017 | ADA | 39 | 1 |