| Ticker | CompanyName | |
| OMEF | Omega Financial Corporation | Seasonal Analysis |
| ORBT | Orbit International Corporation | Seasonal Analysis |
| OFIX | Orthofix International N.V. | Seasonal Analysis |
| OMNI | OMNI Energy Services Corp. | Seasonal Analysis |
| OZRK | Bank of the Ozarks | Seasonal Analysis |
| OYOG | OYO Geospace Corporation | Seasonal Analysis |
| OXGN | OXiGENE, Inc. | Seasonal Analysis |
| OVTI | OmniVision Technologies, Inc. | Seasonal Analysis |
| OVRL | Overland Storage, Inc. | Seasonal Analysis |
| OVBC | Ohio Valley Banc Corp. | Seasonal Analysis |
| OTTR | Otter Tail Corporation | Seasonal Analysis |
| OTEX | Open Text Corporation | Seasonal Analysis |
| OTCM | | Seasonal Analysis |
| OSUR | OraSure Technologies, Inc. | Seasonal Analysis |
| OSTK | Overstock.com, Inc. | Seasonal Analysis |
| OSTE | Osteotech, Inc. | Seasonal Analysis |
| OSKY | MIDWESTONE FINL GR | Seasonal Analysis |
| OSIS | OSI Systems, Inc. | Seasonal Analysis |
| OSIP | OSI Pharmaceuticals Inc. | Seasonal Analysis |
| OSBC | Old Second Bancorp, Inc. | Seasonal Analysis |
| ORYX | | Seasonal Analysis |
| ORLY | O'Reilly Automotive, Inc. | Seasonal Analysis |
| ORFR | | Seasonal Analysis |
| ORCT | Orckit Communications, Limited | Seasonal Analysis |
| ORCL | Oracle Corporation | Seasonal Analysis |
| ORCI | | Seasonal Analysis |
| ORCH | Orchid Cellmark Inc. | Seasonal Analysis |
| ORCC | Online Resources Corporation | Seasonal Analysis |
| ORBK | Orbotech Ltd. | Seasonal Analysis |
| OCAS | OHIO CASUALTY CP | Seasonal Analysis |
| OBCI | Ocean Bio-Chem, Inc. | Seasonal Analysis |
| OBAS | Optibase Ltd. | Seasonal Analysis |
| OATS | WILD OATS MARKETS | Seasonal Analysis |
| OAKF | OAK HILL FIN INC | Seasonal Analysis |
| OPWV | Openwave Systems Inc | Seasonal Analysis |
| OPTV | OpenTV Corp. | Seasonal Analysis |
| OPTO | | Seasonal Analysis |
| OPTN | OPTION CARE INC | Seasonal Analysis |
| OPTI | | Seasonal Analysis |
| OPTC | Optelecom-NKF, Inc. | Seasonal Analysis |
| OPOF | Old Point Financial Corporation | Seasonal Analysis |
| OPNT | OPNET Technologies Inc. | Seasonal Analysis |
| OPMR | Optimal Group, Inc. | Seasonal Analysis |
| OPLK | Oplink Communications, Inc. | Seasonal Analysis |
| ONXX | ONYX Pharmaceuticals, Inc. | Seasonal Analysis |
| ONNN | ON Semiconductor Corporation | Seasonal Analysis |
| ONFC | Oneida Financial Corp. | Seasonal Analysis |
| ONCY | Oncolytics Biotech, Inc. | Seasonal Analysis |
| OMTL | OMTOOL LTD | Seasonal Analysis |
| OMCL | Omnicell, Inc. | Seasonal Analysis |
| OLGC | ORTHOLOGIC CP | Seasonal Analysis |
| OLAB | | Seasonal Analysis |
| OKSB | Southwest Bancorp, Inc. | Seasonal Analysis |
| OIIM | O2Micro International Limited | Seasonal Analysis |
| OICO | O. I. Corporation | Seasonal Analysis |
| ODSY | Odyssey Healthcare, Inc. | Seasonal Analysis |
| ODFL | Old Dominion Freight Line, Inc. | Seasonal Analysis |
| OCPI | OPTICAL COMM PRODS | Seasonal Analysis |
| OCFC | OceanFirst Financial Corp. | Seasonal Analysis |
| OCENY | OCE ADR | Seasonal Analysis |
| ONGC.NS | OIL AND NATURAL GAS CORP. | Seasonal Analysis |
| OLN | OLIN CP | Seasonal Analysis |
| OBCHX | OBERWEIS CHINA OPPORTUNITIES FU | Seasonal Analysis |
| ODP | OFFICE DEPOT INC | Seasonal Analysis |
| OTIV | On Track Innovations Ltd | Seasonal Analysis |
| OCTL | | Seasonal Analysis |
| ONT | ON2 TECHNOLOGIES INC | Seasonal Analysis |
| OIH | OIL SERVICE HOLDRS T | Seasonal Analysis |
| OAKGX | OAKMARK GLOBAL FD CL I SRS OF H | Seasonal Analysis |
| OAKBX | OAKMARK EQUITY AND INCOME FUND | Seasonal Analysis |
| OSK | OSHKOSH CP | Seasonal Analysis |
| OPGSX | OPPENHEIMER GOLD & SPECIAL MINE | Seasonal Analysis |
| OKE | ONEOK INC NEW | Seasonal Analysis |
| OXY | OCCIDENTAL PET | Seasonal Analysis |
| OMTR | Omniture, Inc. | Seasonal Analysis |
| OIBAX | OPPENHEIMER INTERNATIONAL BOND | Seasonal Analysis |
| OI | OWENS ILLINOIS | Seasonal Analysis |
| OAKEX | OAKMARK INTERNATIONAL SMALL CAP | Seasonal Analysis |
| OEPIX | OIL EQUIPMENT DISTRIBUTION S | Seasonal Analysis |
| OGGFX | JPMORGAN SMALL CAP GROWTH FUND | Seasonal Analysis |
| OWRRX | OLD WESTBURY REAL RETURN FUND | Seasonal Analysis |
| OSX | | Seasonal Analysis |
| OIL | IPATH ETN CRUDE OIL | Seasonal Analysis |
| OOIL | | Seasonal Analysis |
| O | REALTY INCOME CP | Seasonal Analysis |
| ORA | | Seasonal Analysis |
| OXM | Oxford Industries, Inc. Common | Seasonal Analysis |
| ODMAX | OPPENHEIMER DEVELOPING MARKETS | Seasonal Analysis |
| OAKIX | | Seasonal Analysis |
| OMG | | Seasonal Analysis |
| OCNF | | Seasonal Analysis |
| OPITX | | Seasonal Analysis |
| OPEN | | Seasonal Analysis |