| OKLAHOMA LIQUID FEED, L.L.C. | 3500584998 | 1997-05-21 | Canceled | — |
| OKLAHOMA MAILING SERVICES, L.L.C. | 3500582383 | 1997-03-28 | Canceled | — |
| OKLAHOMA MANAGEMENT SERVICES FOR PHYSICIANS, LLC | 3500591283 | 1997-10-01 | Dissolved | — |
| OKLAHOMA MANAGEMENT, INC. | 1900593311 | 1997-11-10 | Active | — |
| OKLAHOMA MARKETING, L.L.C. | 3500583691 | 1997-04-25 | Canceled | — |
| OKLAHOMA MEDIATION CENTER, L.L.C. | 3500579214 | 1997-01-28 | Canceled | — |
| OKLAHOMA MEDICAL GROUP MANAGEMENT ASSOCIATION, INC. | 2100582221 | 1997-03-25 | Active | — |
| OKLAHOMA MEDICAL RESEARCH FOUNDATION | 4300599410 | 1997-05-05 | Active | OKLAHOMA CITY |
| OKLAHOMA MILITARY ACADEMY MEMORIAL MUSEUM, INC. | 2100590204 | 1997-09-10 | Dissolved | — |
| OKLAHOMA MISSING CHILDREN INC. | 2100582777 | 1997-04-07 | Active | — |
| OKLAHOMA MOBILE CONCRETE, INC. | 1900588693 | 1997-08-07 | Dissolved | — |
| OKLAHOMA MORTGAGE LENDERS INC. | 1900583685 | 1997-04-24 | Inactive | — |
| OKLAHOMA MORTUARY, INC. | 1900582897 | 1997-04-09 | Inactive | — |
| OKLAHOMA NARCOTICS DETECTION DOGS, L.L.C. | 3500578520 | 1997-01-14 | Canceled | — |
| OKLAHOMA NATIONAL GUARD MARKSMANSHIP HALL OF FAME, INCORPORATED | 2100590900 | 1997-09-24 | Active | — |
| OKLAHOMA NEON SERVICES, INC. | 1900579027 | 1997-01-24 | Inactive | — |
| OKLAHOMA NETWORK FOR MULTI-CULTURAL SERVICES, INC. | 2100585666 | 1997-06-04 | Active | — |
| OKLAHOMA OLD TIME WARDANCE CELEBRATION ASSOCIATION | 2100592394 | 1997-10-23 | Active | — |
| OKLAHOMA OPTOMETRIC FOUNDATION, INC. | 2100593105 | 1997-11-07 | Active | — |
| OKLAHOMA PAYPHONE LOCATORS, INC. | 1900587006 | 1997-07-01 | Inactive | — |
| OKLAHOMA PECAN COMPANY, INC. | 1900581364 | 1997-03-10 | Active | — |
| OKLAHOMA PEDAL PULLERS ASSOCIATION | 2100588178 | 1997-07-28 | Active | — |
| OKLAHOMA PERFORMANCE SPECIALTY AND EQUIPMENT, INC. | 1900582429 | 1997-03-31 | Dissolved | — |
| OKLAHOMA PETROLEUM RECLAIMERS, INC. | 1900581040 | 1997-03-05 | Dissolved | — |
| OKLAHOMA PHYSICIANS & SURGEONS ASSOCIATION, INC. | 2100589652 | 1997-08-28 | Active | — |
| OKLAHOMA PRIDE TRUCKING, INC. | 1900587156 | 1997-07-02 | Inactive | — |
| OKLAHOMA PRIMATE SANCTUARY, INC. | 2100588201 | 1997-07-28 | Active | — |
| OKLAHOMA PROPERTY INTERESTS, L.L.C. | 3500584682 | 1997-05-14 | Active | OKLAHOMA CITY |
| OKLAHOMA PROTOCARE HEALTH SERVICES, P.C., INC. | 2200590017 | 1997-09-05 | Inactive | — |
| OKLAHOMA PSYCHIATRIC FOUNDATION DBA WILLOW VIEW MENTAL HEALTH SYSTEM | 4300599424 | 1997-07-14 | Inactive | — |
| OKLAHOMA REAL ESTATE FOR SALE BY OWNER, INC. | 1900593399 | 1997-11-14 | Inactive | — |
| OKLAHOMA REGIONAL HEART SURGERY ASSOCIATES, INC. | 1900578462 | 1997-01-14 | Dissolved | — |
| OKLAHOMA RIG, INC. | 1900589640 | 1997-08-28 | Merged | — |
| OKLAHOMA RURAL BUSINESS ACADEMY, INC. | 1900592103 | 1997-10-16 | Inactive | — |
| OKLAHOMA RURAL HEALTH PARTNERSHIP, INC. | 2100587325 | 1997-07-08 | Active | — |
| OKLAHOMA SENIOR LIVING ASSOCIATION | 2100583802 | 1997-04-28 | Active | — |
| OKLAHOMA SHERIFFS AND PEACE OFFICERS ASSOCIATION | 4300590578 | 1997-08-18 | Active | OKLAHOMA CITY |
| OKLAHOMA SHERIFFS ASSOCIATION, INC. | 4300594433 | 1997-02-27 | Expired | — |
| OKLAHOMA SHORING AND STEEL PLATE RENTAL, INC. | 1900591064 | 1997-09-26 | Merged | — |
| OKLAHOMA SILURIAN PARTNERS L.L.C. | 3500596043 | 1997-12-31 | Active | TULSA |
| OKLAHOMA SKILL SYSTEM CORPORATION | 1900591853 | 1997-10-14 | Dissolved | — |
| OKLAHOMA SOCIETY OF ADDICTION MEDICINE | 2100585916 | 1997-06-09 | Active | — |
| OKLAHOMA SODA BLASTING, INC. | 1900588351 | 1997-07-31 | Inactive | — |
| OKLAHOMA SOUTHERN COMPANIES L.L.C. | 3500593397 | 1997-11-10 | Canceled | — |
| OKLAHOMA SOYBEAN BOARD, INC. | 2100587501 | 1997-07-11 | Active | — |
| OKLAHOMA SPECIALTIES INC. | 1900588433 | 1997-08-01 | Active | — |
| OKLAHOMA SPINECARE AND PAIN MANAGEMENT CLINIC, P.C. | 2200580586 | 1997-02-25 | Dissolved | — |
| OKLAHOMA SPORTING SUPPLIES, INC. | 1900585828 | 1997-06-06 | Active | — |
| OKLAHOMA STATE ELECTROLOGISTS ASSOCIATION | 2100580001 | 1997-02-12 | Active | — |
| OKLAHOMA STATE RALLY COMMITTEE, INC. | 2100591352 | 1997-10-02 | Active | — |