| Company Name |
Symbol |
| O'Charley's Inc. |
CHUX |
| O'Reilly Automotive, Inc. |
ORLY |
| O. I. Corporation |
OICO |
| O2Micro International Limited |
OIIM |
| Oak Ridge Financial Services, Inc. |
BKOR |
| Oak Valley Bancorp (CA) |
OVLY |
| OBA Financial Services, Inc. |
OBAF |
| Obagi Medical Products, Inc. |
OMPI |
| Occam Networks, Inc. |
OCNW |
| OccuLogix, Inc. |
TEAR |
| Ocean Bio-Chem, Inc. |
OBCI |
| Ocean Power Technologies, Inc. |
OPTT |
| Ocean Shore Holding Co. |
OSHC |
| OceanFirst Financial Corp. |
OCFC |
| OceanFreight Inc. |
OCNF |
| Oclaro, Inc. |
OCLR |
| Oculus Innovative Sciences, Inc. |
OCLS |
| Odyssey Healthcare, Inc. |
ODSY |
| Odyssey Marine Exploration, Inc. |
OMEX |
| Ohio Legacy Corporation |
OLCB |
| Ohio Valley Banc Corp. |
OVBC |
| Old Dominion Freight Line, Inc. |
ODFL |
| Old Line Bancshares, Inc. |
OLBK |
| Old Point Financial Corporation |
OPOF |
| Old Second Bancorp, Inc. |
OSBC |
| Olympic Steel, Inc. |
ZEUS |
| Omega Flex, Inc. |
OFLX |
| Omega Navigation Enterprises, Inc. |
ONAV |
| Omeros Corporation |
OMER |
| OMNI Energy Services Corp. |
OMNI |
| OmniAmerican Bancorp, Inc. |
OABC |
| Omnicell, Inc. |
OMCL |
| OmniVision Technologies, Inc. |
OVTI |
| On Assignment, Inc. |
ASGN |
| ON Semiconductor Corporation |
ONNN |
| On Track Innovations Ltd |
OTIV |
| OncoGenex Pharmaceuticals Inc. |
OGXI |
| Oncolytics Biotech, Inc. |
ONCY |
| Oncothyreon Inc . |
ONTY |
| Oneida Financial Corp. |
ONFC |
| Online Resources Corporation |
ORCC |
| Onstream Media Corporation |
ONSM |
| Onvia, Inc. |
ONVI |
| ONYX Pharmaceuticals, Inc. |
ONXX |
| Open Text Corporation |
OTEX |
| OpenTable, Inc. |
OPEN |
| OpenTV Corp. |
OPTV |
| Openwave Systems Inc |
OPWV |
| Opexa Therapeutics, Inc. |
OPXA |
| Oplink Communications, Inc. |
OPLK |
| OPNET Technologies Inc. |
OPNT |
| Opnext, Inc. |
OPXT |
| Optelecom-NKF, Inc. |
OPTC |
| Optibase Ltd. |
OBAS |
| Optical Cable Corporation |
OCCF |
| Optimal Group, Inc. |
OPMR |
| Optimer Pharmaceuticals, Inc. |
OPTR |
| OptimumBank Holdings, Inc. |
OPHC |
| optionsXpress Holdings, Inc. |
OXPS |
| Oracle Corporation |
ORCL |
| Orange 21 Inc. |
ORNG |
| OraSure Technologies, Inc. |
OSUR |
| ORBCOMM Inc. |
ORBC |
| Orbit International Corporation |
ORBT |
| Orbotech Ltd. |
ORBK |
| Orchid Cellmark Inc. |
ORCH |
| Orckit Communications, Limited |
ORCT |
| Ore Pharmaceutical Holdings Inc. |
ORXE |
| Orexigen Therapeutics, Inc. |
OREX |
| Origin Agritech Limited |
SEED |
| Orion Energy Systems, Inc. |
OESX |
| Oritani Financial Corp. |
ORIT |
| Orrstown Financial Services Inc |
ORRF |
| Orthofix International N.V. |
OFIX |
| Orthologic Corp. |
CAPS |
| Orthovita, Inc. |
VITA |
| OSI Pharmaceuticals Inc. |
OSIP |
| OSI Systems, Inc. |
OSIS |
| Osiris Therapeutics, Inc. |
OSIR |
| Osteotech, Inc. |
OSTE |
| OTIX Global, Inc |
OTIX |
| Otter Tail Corporation |
OTTR |
| Outdoor Channel Holdings, Inc. |
OUTD |
| Overland Storage, Inc. |
OVRL |
| Overstock.com, Inc. |
OSTK |
| OXiGENE, Inc. |
OXGN |
| Oxygen Biotherapeutics, Inc. |
OXBT |
| OYO Geospace Corporation |
OYOG |
