| OKLAHOMA CITY INTERTRIBAL SENIOR CITIZENS | — | 2100395304 | 1982-10-20 | Active | |
| OKLAHOMA CITY LENDERS SERVICES, INC. | — | 1900392132 | 1982-08-13 | Inactive | |
| OKLAHOMA CITY MAINTENANCE SERVICES, INC. | — | 1900396672 | 1982-11-16 | Inactive | |
| OKLAHOMA CITY MEDICAL INVESTORS, LTD. | — | 3400014482 | 1982-05-13 | Canceled | |
| OKLAHOMA CITY PSYCHIATRIC CENTER, INC. | — | 1900399089 | 1982-12-30 | Inactive | |
| OKLAHOMA CITY RANGERS SECURITY CORPORATION | — | 1900381792 | 1982-02-04 | Inactive | |
| OKLAHOMA CITY SLICKERS BOOSTER CLUB, INC. | — | 2100399090 | 1982-12-30 | Active | |
| OKLAHOMA CITY SLICKERS, INC. | — | 1900397463 | 1982-12-03 | Inactive | |
| OKLAHOMA COALITION OF FUND FOR ASSURING AN INDEPENDENT RETIREMENT | — | 2100383806 | 1982-03-08 | Dissolved | |
| OKLAHOMA COMMUNITY SERVICES, INC. | — | 2100382776 | 1982-02-18 | Dissolved | |
| OKLAHOMA CONNECTION SKI TOURS, INC. | — | 1900394428 | 1982-10-01 | Inactive | |
| OKLAHOMA CONSTRUCTORS, INC. | — | 1900381557 | 1982-02-01 | Dissolved | |
| OKLAHOMA CONSUMER ALLIANCE INCORPORATED | — | 1900398953 | 1982-12-29 | Inactive | |
| OKLAHOMA COUNTY INVESTMENT LTD. | — | 1900398503 | 1982-12-22 | Inactive | |
| OKLAHOMA CRUDE EXPLORATION CORPORATION | — | 1900387795 | 1982-05-18 | Inactive | |
| OKLAHOMA CRUDE PROCESSING, LTD. | — | 1900392818 | 1982-08-30 | Inactive | |
| OKLAHOMA DINNER THEATRES COMPANY | — | 1900399091 | 1982-12-30 | Inactive | |
| OKLAHOMA DIVERS SUPPLY, LTD. | — | 1900396123 | 1982-11-04 | Inactive | |
| OKLAHOMA DOWNS, INC. | — | 1900396928 | 1982-11-22 | Inactive | |
| OKLAHOMA DRILLING CONSULTANTS, INC. | — | 1900394861 | 1982-10-12 | Inactive | |
| OKLAHOMA DRUG ALTERNATIVE SCHOOLS,INC. | — | 1900380984 | 1982-01-21 | Inactive | |
| OKLAHOMA ECONOMIC DEVELOPMENT COUNCIL ASSOCIATION | — | 2100384270 | 1982-03-15 | Dissolved | |
| OKLAHOMA EDUCATIONAL RESEARCH INC. | — | 2100397323 | 1982-12-01 | Dissolved | |
| OKLAHOMA EDUCATIONAL TELEVISION AUTHORITY FOUNDATION, INC. | — | 2100398231 | 1982-12-17 | Dissolved | |
| OKLAHOMA EMBROIDERY, INC. | — | 1900389342 | 1982-06-17 | Inactive | |
| OKLAHOMA EMERGENCY PHYSICIANS, INC. | — | 2200397860 | 1982-12-10 | Dissolved | |
| OKLAHOMA EMERITUS SERTOMA CLUB, INC. | — | 2100390086 | 1982-06-30 | Active | |
| OKLAHOMA ENERGY ASSOCIATES, INC. | — | 1900392488 | 1982-08-23 | Inactive | |
| OKLAHOMA ENERGY INVESTMENT GROUP | — | 3300015232 | 1982-09-16 | Dissolved | |
| OKLAHOMA ENVIRONMENTAL SERVICES, INC. | — | 1900388514 | 1982-06-01 | Inactive | |
| OKLAHOMA EPSILON OMICRON ALUMNI ASSOCIATION OF ALPHA TAU OMEGA FRATERNITY, INC. | — | 2100390087 | 1982-06-30 | Active | |
| OKLAHOMA EQUALIZATION SERVICE, INC. | — | 1900395998 | 1982-08-03 | Merged | |
| OKLAHOMA FARM & RANCH SUPPLY INC. | — | 1900394008 | 1982-09-23 | Dissolved | |
| OKLAHOMA FEDERATED GOLD & SILVER, INC. | — | 1900394759 | 1982-10-08 | Inactive | |
| OKLAHOMA FEDERATED SECURITY & DETECTIVE CORP. | — | 1900395520 | 1982-10-25 | Inactive | |
| OKLAHOMA FERGUS, INC. | — | 1900398328 | 1982-12-20 | Inactive | |
| OKLAHOMA FURNITURE DISTRIBUTORS, INC. | — | 1900392086 | 1982-08-11 | Inactive | |
| OKLAHOMA GEESE UNLIMITED, INC. | — | 1900381373 | 1982-01-28 | Active | |
| OKLAHOMA GOLD JEWELRY, INC. | — | 1900388007 | 1982-05-21 | Inactive | |
| OKLAHOMA GROUP INSURANCE ADMINISTRATORS AGENCY, INC. | — | 3100398417 | 1982-12-21 | Inactive | |
| OKLAHOMA GUZZI RIDERS, INC. | — | 2100383807 | 1982-03-08 | Active | |
| OKLAHOMA HEAD START DIRECTORS ASSOCIATION | — | 2100382540 | 1982-02-15 | Active | |
| OKLAHOMA HERITAGE FARMS, INC. | — | 1900392604 | 1982-08-25 | Inactive | |
| OKLAHOMA HOME EQUITIES, LTD. | — | 3300015179 | 1982-09-09 | Dissolved | |
| OKLAHOMA HORSE RACING DIGEST INCORPORATED | — | 1900397397 | 1982-12-02 | Inactive | |
| OKLAHOMA HORSE REVIEW, INC. | — | 1900398708 | 1982-12-27 | Inactive | |
| OKLAHOMA HUMANE ASSOCIATION, INC. | — | 2100390555 | 1982-03-29 | Active | |
| OKLAHOMA INDIAN BUSINESS ASSOCIATION INC. | — | 2100393673 | 1982-09-16 | Active | |
| OKLAHOMA INFORMATION SYSTEMS | — | 3300015624 | 1982-11-23 | Dissolved | |
| OKLAHOMA INSURANCE ADMINISTRATORS, INC. | — | 1900381308 | 1982-01-27 | Dissolved | |