All companies A–Z — O
- O-I Glass, Inc. /DE/
- O Reilly Automotive Inc
- Oak Valley Bancorp
- Oak View Bankshares, Inc.
- Oaktree Acquisition Corp. III Life Sciences
- Oaktree Specialty Lending Corp
- Oakworth Capital, Inc.
- Oatly Group AB
- OBIC Co., Ltd./ADR
- OBIC Business Consultants Co., Ltd./ADR
- Obook Holdings Inc.
- Obsidian Energy Ltd.
- Occidental Petroleum Corp /De/
- Ocean Biomedical, Inc.
- Ocean Capital Acquisition Corp
- Ocean Power Technologies, Inc.
- Ocean Thermal Energy Corp
- OceanaGold Corp
- Oceaneering International Inc
- Oceanfirst Financial Corp
- Oceanhawk Acquisition Corp.
- Oceanic Iron Ore Corp
- OceanLight Acquisition Corp
- OceanPal Inc.
- Oconee Financial Corp
- Octave Intelligence plc
- Octave Specialty Group Inc
- Ocugen, Inc.
- Ocular Therapeutix, Inc
- Oculis Holding AG
- Oculus Inc.
- Odakyu Electric Railway Co., Ltd./ADR
- Oddity Tech Ltd
- Odysight.ai Inc.
- Odyssey Health, Inc.
- Odyssey Marine Exploration Inc
- Odyssey Therapeutics, Inc.
- OFA Group
- Offerpad Solutions Inc.
- Office Properties Income Trust
- Ofg Bancorp
- OFS Capital Corp
- OFS Credit Company, Inc.
- Oge Energy Corp.
- Ohio Valley Banc Corp
- Ohmyhome Ltd
- Oil-Dri Corp of America
- Oil States International, Inc
- OIO Group
- Okeanis Eco Tankers Corp.
- Oklo Inc.
- Okmin Resources, Inc.
- Okta, Inc.
- OKYO Pharma Ltd
- Olaplex Holdings, Inc.
- Olb Group, Inc.
- Old Dominion Freight Line, Inc.
- OLD MARKET CAPITAL Corp
- Old National Bancorp /In/
- Old Republic International Corp
- Old Second Bancorp Inc
- Olema Pharmaceuticals, Inc.
- Olenox Industries Inc.
- OLIN Corp
- Ollie's Bargain Outlet Holdings, Inc.
- Omada Health, Inc.
- Omega Flex, Inc.
- Omega Healthcare Investors Inc
- Omeros Corp
- OmniAb, Inc.
- Omnicell, Inc.
- Omnicom Group Inc.
- OMNIQ Corp.
- Omnitek Engineering Corp
- OMS Energy Technologies Inc.
- On Holding AG
- On Semiconductor Corp
- Onar Holding Corp
- Once Upon a Farm, PBC
- Oncology Institute, Inc.
- Oncolytics Biotech Inc
- Onconetix, Inc.
- Oncotelic Therapeutics, Inc.
- Ondas Inc.
- One & one Green Technologies. INC
- One Bullion Ltd
- ONE Gas, Inc.
- ONE Group Hospitality, Inc.
- One Liberty Properties Inc
- One Stop Systems, Inc.
- One World Products, Inc.
- OneConstruction Group Ltd
- OneIM Acquisition Corp.
- OneMain Holdings, Inc.
- OneMedNet Corp
- OneMeta Inc.
- Oneok Inc /New/
- OneSpan Inc.
- ONESPAWORLD HOLDINGS Ltd
- OneWater Marine Inc.
- Onfolio Holdings, Inc
- Onity Group Inc.
- OnKure Therapeutics, Inc.
- Onterris, Inc.
- Onto Innovation Inc.
- Onward Medical N.V./ADR
- Ooma Inc
- OP Bancorp
- OPAL Fuels Inc.
- Open House Group Co. Ltd/ADR
- Open Lending Corp
- Open Text Corp
- Opendoor Technologies Inc.
- OPENLANE, Inc.
- OpenPayd Global Holdings Ltd
- Opera Ltd
- Opko Health, Inc.
- Oportun Financial Corp
- Oppenheimer Holdings Inc
- OppFi Inc.
- Optex Systems Holdings Inc
- Opthea Ltd
- Optical Cable Corp
- Optimi Health Corp.
- OptimizeRx Corp
- Optimum Communications, Inc.
- OptimumBank Holdings, Inc.
- Option Care Health, Inc.
- Opus Genetics, Inc.
- OR Royalties Inc.
- Oracle Corp
- Oragenics Inc
- Oramed Pharmaceuticals Inc.
- Orange
- Orange County Bancorp, Inc. /DE/
- Orangekloud Technology Inc.
- OranjeBTC S.A. Educacao E Investmentimento/ADR
- Orasure Technologies Inc
- Orchestra BioMed Holdings, Inc.
- Orchid Island Capital, Inc.
- Orestone Mining Corp.
- Organigram Global Inc.
- Organo Corporation/ADR
- Organogenesis Holdings Inc.
- Organon & Co.
- Oric Pharmaceuticals, Inc.
- Oriental Culture Holding LTD
- ORIENTAL RISE HOLDINGS Ltd
- Origin Agritech LTD
- Origin Bancorp, Inc.
- Origin Investment Corp I
- Originclear, Inc.
- Orion Group Holdings Inc
- Orion Bliss Corp.
- Orion Digital Corp.
- Orion Energy Systems, Inc.
- Orion Properties Inc.
- Orion S.A.
- Orix Corp
- Orla Mining Ltd.
- Ormat Technologies, Inc.
- Oroco Resource Corp
- Orrstown Financial Services Inc
- Orthofix Medical Inc.
- Orthopediatrics Corp
- Oruka Therapeutics, Inc.
- OS Therapies Inc
- Oscar Health, Inc.
- Oshkosh Corp
- Osi Systems Inc
- Osisko Gold Group Inc.
- Osotspa Public Co Limited/ADR
- Osprey Acquisition Corp. III
- Osprey Bitcoin Trust
- Osprey BNB Chain Trust
- Osprey BONK Trust
- Osprey Polkadot Trust
- Osprey Solana Trust
- OSR Health, Inc.
- Ostin Technology Group Co., Ltd.
- OTG Acquisition Corp. I
- Otis Worldwide Corp
- Otter Tail Corp
- Ottobock SE & Co. KGaA/ADR
- Our Bond, Inc.
- Ouster, Inc.
- Outcrop Silver & Gold Corp
- Outdoor Holding Co
- Outdoor Specialty Products, Inc.
- OUTFRONT Media Inc.
- Outlook Therapeutics, Inc.
- Outset Medical, Inc.
- Ovid Therapeutics Inc.
- Ovintiv Inc.
- Owens Corning
- Owlet, Inc.
- OXBRIDGE RE HOLDINGS Ltd
- Oxford Industries Inc
- Oxford Lane Capital Corp.
- Oxford Square Capital Corp.
- Oxley Bridge Acquisition Ltd
- Oyocar Group Inc.
- Oyster Enterprises II Acquisition Corp
- Oz Vision Inc.
- Ozop Energy Solutions, Inc.