| ORC | | Real Estate Investment Trusts | 1518621 |
| ORCL | | Services-Prepackaged Software | 1341439 |
| ORESF | | - | 1481857 |
| ORGN | | Industrial Organic Chemicals | 1802457 |
| ORGO | | Pharmaceutical Preparations | 1661181 |
| ORGS | | Pharmaceutical Preparations | 1460602 |
| ORI | | Surety Insurance | 74260 |
| ORIC | | Pharmaceutical Preparations | 1796280 |
| ORIQ | | Blank Checks | 2044523 |
| ORIS | | Agricultural Production-Crops | 1964664 |
| ORKA | | Pharmaceutical Preparations | 907654 |
| ORKT | | Services-Prepackaged Software | 1979407 |
| ORLA | | Gold and Silver Ores | 1680056 |
| ORLY | | Retail-Auto & Home Supply Stores | 898173 |
| ORMP | | Pharmaceutical Preparations | 1176309 |
| ORN | | Heavy Construction Other Than Bldg Const - Contractors | 1402829 |
| ORRCF | | - | 1390352 |
| ORRF | | State Commercial Banks | 826154 |
| OS | | Services-Prepackaged Software | 1889956 |
| OSBC | | State Commercial Banks | 357173 |
| OSBK | | State Commercial Banks | 1076691 |
| OSCR | | Hospital & Medical Service Plans | 1568651 |
| OSG | | Surety Insurance | 874501 |
| OSIS | | Semiconductors & Related Devices | 1039065 |
| OSK | | Motor Vehicles & Passenger Car Bodies | 775158 |
| OSOL | | - | 1868282 |
| OSPN | | Services-Computer Integrated Systems Design | 1044777 |
| OSRH | | Surgical & Medical Instruments & Apparatus | 1840425 |
| OSS | | Electronic Computers | 1394056 |
| OST | | Electronic Components, NEC | 1803407 |
| OSTX | | Pharmaceutical Preparations | 1795091 |
| OSUR | | Surgical & Medical Instruments & Apparatus | 1116463 |
| OSW | | Services-Membership Sports & Recreation Clubs | 1758488 |
| OTEX | | Services-Computer Integrated Systems Design | 1002638 |
| OTF | | - | 1747777 |
| OTGA | | Blank Checks | 2077010 |
| OTH | | Ship & Boat Building & Repairing | 2067767 |
| OTIS | | Electronic & Other Electrical Equipment (No Computer Equip) | 1781335 |
| OTLC | | Pharmaceutical Preparations | 908259 |
| OTLK | | Biological Products, (No Diagnostic Substances) | 1649989 |
| OTLY | | Food and Kindred Products | 1843586 |
| OTRKQ | | Services-Misc Health & Allied Services, NEC | 1136174 |
| OTSA | | Services-Commercial Physical & Biological Research | 2046462 |
| OTTR | | Electric Services | 1466593 |
| OUNZ | | Commodity Contracts Brokers & Dealers | 1546652 |
| OUST | | General Industrial Machinery & Equipment, NEC | 1816581 |
| OUT | | Real Estate Investment Trusts | 1579877 |
| OVBC | | State Commercial Banks | 894671 |
| OVID | | Pharmaceutical Preparations | 1636651 |
| OVLY | | State Commercial Banks | 1431567 |
