| OVTI | OmniVision Technologies, Inc. | 14.31 | Stock | Semiconductor - Integrated Circuits | NMS |
| OMC | Omnicom Group Inc. | 63.31 | Stock | Advertising Agencies | NYQ |
| OCR | Omnicare Inc. | 46.23 | Stock | Drugs Wholesale | NYQ |
| MSO | Martha Stewart Living Omnimedia Inc. | 2.51 | Stock | Publishing - Periodicals | NYQ |
| OMCL | Omnicell Inc. | 18.81 | Stock | Computer Based Systems | NMS |
| OABC | Omniamerican Bancorp, Inc. | 24.07 | Stock | Regional - Southwest Banks | NMS |
| OMTK | Omnitek Engineering Corp. | 2.53 | Stock | | OBB |
| OMNITECH.BO | Omnitech Infosolutions Limited | 131.95 | Stock | Information Technology Services | BSE |
| OMCM | OmniComm Systems Inc. | 0.14 | Stock | Internet Software & Services | PNK |
| OCR-PB | Omnicare, Inc. Omnicare Capital | 57.33 | Stock | | NYQ |
| GB00B3V30W06.L | IFDS Omnis Threadneedle Advanced B | 201.00 | Mutual Fund | | LSE |
| OM3.MU | OMNIVISION TECH | 10.55 | Stock | Semiconductor - Broad Line | MUN |
| EZM.BE | PLAST.OMNIUM | 37.71 | Stock | Auto Parts | BER |
| GB00B3V31059.L | IFDS Omnis Threadneedle Cautious B | 169.00 | Mutual Fund | | LSE |
| GB00B3V30R52.L | IFDS Omnis Distribution A Acc | 165.00 | Mutual Fund | | LSE |
| BOSVX | Bridgeway Omni Small-Cap Value N | 14.04 | Mutual Fund | | NAS |
| F0000025QA.MI | Zed Omnifund Bilanciata 65 | 11.66 | Mutual Fund | | MIL |
| OML.V | Omni-Lite Industries Canada Inc. | 0.62 | Stock | Metal Fabrication | VAN |
| B39KSS5.L | IFDS Omnis Cautious A | 145.00 | Mutual Fund | | LSE |
| OMBP | Omni Bio Pharmaceutical, Inc. | 0.30 | Stock | Biotechnology | OBB |