O2 Micro International

Oak Technology Inc.

Oakwood Homes Corporation

OAO Aeroflot Russian Airlines

OAO Lukoil

Occam Networks

Occidental Petroleum Corporation

Oce N V

Ocean Energy Inc

Oceaneering International Inc

OceanFirst Financial Corp

Ocular Sciences Inc.

Ocwen Financial Corporation

Odebrecht S.A.

ODME B.V.

Odwalla Inc.

Oetker Gruppe

Office Depot Inc

OfficeMax Inc.

Official Payments Corp.

Offshore Logistics Inc

OGE Energy Corp.

Oglebay Norton Company

Ohio Casualty Corporation

Oil Search Ltd

Oki Electric Industry Company Limited

Okinawa Electric Power Company

Olcese SPA

Old Mutual

Old National Bancorp

Old Republic International Corporation

Old Second Bancorp Inc.

Olin Corporation

Olitec

Olivetti S.p.A.

OM AB

OM Group Inc

Omega Financial Corporation.

Omni Nutraceuticals Inc.

Omnicare Inc.

Omnicom Group Inc.

OmniVision Technologies Inc

Omnova Solutions Inc

Omron Corporation

Omtool Ltd.

OMV Aktiengesellschaft

On Assignment Inc

On Command Corporation

ON Semiconductor Corporation

OnCure Technologies Corp.

One Voice Technologies Inc.

Onecap

OneClickHR plc

ONEOK Inc.

ONI Systems Corp.

On-line plc

OnLine Power Supply Inc.

Online Resources Corporation

Ono Pharmaceuticals

OnVista AG

Onyx Acceptance Corporation

Onyx Pharmaceuticals Inc.

Onyx Software Corporation

Open Text Corporation

OpenTV Corp.

Openwave Systems Inc.

Opera Construction

OPNET Technologies Inc.

Optical Cable Corporation

Optical Communication Products Inc.

OptiCom ASA

Optima Batteries

Optimal Robotics Corporation

Option Care Inc.

Oracle Corporation

Oracle Corporation Japan

Orange SA

OraPharma Inc.

OraSure TechnologiesInc.

ORATEC InterventionsInc.

Orbit E-Commerce Inc.

Orbital Sciences Corporation

Orbotech Ltd.

Orchestream Holdings PLC

Orchid BioSciences Inc.

Orckit Communications Ltd

O'Reilly Automotive Inc.

Organogenesis Inc

Orient Semiconductor Electronics

ORIX Corporation

Orphan Medical Inc.

Ortec International

Orthodontic Centers of America

Orthometrix

OSCAInc.

OshKosh B Gosh Inc

Oshkosh Truck Corporation

OSI Pharmaceuticals

OsteoTech Inc.

Ostex International Inc.

Otavi Minen AG

Otsuka Pharmaceutical Co. Ltd.

Otter Tail Corporation

Otto Reichelt AG

OurPet's Company

Outback Steakhouse Inc.

Oversea-Chinese Banking Corp. Ltd.

Overseas Shipholding Group Inc

Overture Services Inc.

Owens & Minor Inc.

Owens Corning

Owens Group Limited

Owens Illinois

Owens-Illinois Inc.

Oxbow Corporation

Oxford Automotive Inc.

Oxford BioMedica

Oxford GlycoSciences Plc

Oxford Health Plans Inc.

Oxford Industries Inc

Oxford Instruments

OXiGENE Inc.

OXIS International Inc.

OYO Geospace Corp