- OCC — Optical Cable Corporation
- OCCI — OFS Credit Company, Inc.
- OCCIN — OFS Credit Company, Inc.
- OCCIO — OFS Credit Company, Inc.
- OCCIP — OFS Credit Company, Inc.
- OCDX — Ortho Clinical Diagnostics Holdings plc
- OCEAW — Ocean Biomedical, Inc.
- OCEN — IQ Clean Oceans ETF
- OCESP — Ocean Spray Cranberries, Inc. PFD 4%
- OCFC — OceanFirst Financial Corp.
- OCFCP — OceanFirst Financial Corp.
- OCFS — Otter Creek Focus Strategy ETF
- OCFT — OneConnect Financial Technology Co., Ltd.
- OCG — Oriental Culture Holding Ltd.
- OCG.TO — Outcrop Silver & Gold Corporation
- OCG.V — Outcrop Silver & Gold Corporation
- OCGN — Ocugen, Inc.
- OCI.V — Orecap Invest Corp.
- OCIO — ClearShares OCIO ETF
- OCIP — OCI Partners LP
- OCLR — Oclaro, Inc.
- OCLTU — OceanLight Acquisition Corporation Units
- OCMAX — OCM Gold Atlas
- OCMPX — Lazard International Quality Growth Portfolio Open Shares
- OCN — Ocwen Financial Corporation
- OCO.V — Oroco Resource Corp.
- OCS — Oculis Holding AG
- OCSI — Oaktree Strategic Income Corporation
- OCSL — Oaktree Specialty Lending Corporation
- OCTA — Tidal Trust II - Octane All-Cap Value Energy ETF
- OCTO — Eightco Holdings Inc.
- OCTV — Octave Intelligence plc
- OCUL — Ocular Therapeutix, Inc.
- OCUP — Ocuphire Pharma, Inc.
- OCX — OncoCyte Corporation
- ODC — Oil-Dri Corporation of America
- ODD — Oddity Tech Ltd.
- ODD.V — Odd Burger Corporation
- ODDS — Pacer BlueStar Digital Entertainment ETF
- ODFL — Old Dominion Freight Line, Inc.
- ODHY — Obra Defensive High Yield ETF
- ODIDX — Oaktree Diversified Income Fund Inc.
- ODMCX — JPMorgan SMID Cap Equity Fund
- ODP — The ODP Corporation
- ODT — Odonate Therapeutics, Inc.
- ODTE — VegaShares SPX NDX RTY Premium Income ETF
- ODTX — Odyssey Therapeutics, Inc.
- ODV — Osisko Development Corp.
- ODV.V — Osisko Development Corp.
- ODVIX — Invesco Developing Markets Fund Class R6
- ODVWZ — Osisko Development Corp. Warrant expiring 5/27/2027
- ODYS — Odysight.ai Inc.
- OEC — Orion Engineered Carbons S.A.
- OEE.V — Memex Inc.
- OEF — iShares SP 100 ETF
- OEFA — ALPS Funds O’Shares International Developed Quality Dividend ETF
- OEG — Orbital Energy Group, Inc.
- OEI — Optimized Equity Income ETF
- OEPW — One Equity Partners Open Water I Corp.
- OEPWU — One Equity Partners Open Water I Corp.
- OEPWW — One Equity Partners Open Water I Corp.
- OESX — Orion Energy Systems, Inc.
- OFAL — OFA Group
- OFC — Corporate Office Properties Trust
- OFG — OFG Bancorp
- OFIX — Orthofix Medical Inc.
- OFLX — Omega Flex, Inc.
- OFOS — Range Global Offshore Oil Services ETF
- OFRM — Once Upon A Farm Pbc
- OFS — OFS Capital Corporation
- OFSSH — OFS Capital Corporation 4.95% Notes due 2028
- OFSSI — Ofs Capital Corp 5.95% Notes Due 2026
- OFSSZ — OFS Capital Corporation - 6.50%
- OG — Onion Global Limited
- OG.V — Oragin Foods Inc.
- OGC — OceanaGold Corporation
- OGC.TO — OceanaGold Corporation
- OGCP — Empire State Realty OP, L.P.
- OGD.TO — Orbit Garant Drilling Inc.
- OGE — OGE Energy Corp.
- OGEN — Oragenics, Inc.
- OGG — Osisko Gold Group Inc.
- OGG.V — Osisko Gold Group Inc.
- OGGWZ — Osisko Gold Group Inc.
- OGI — Organigram Global Inc.
- OGI.TO — OrganiGram Holdings Inc.
- OGIG — ALPS Funds O’Shares Global Internet Giants ETF
- OGMIX — Invesco Gold & Special Minerals R6
- OGMYX — Invesco Gold & Special Minerals Y
- OGN — Organon & Co.
- OGN.V — Orogen Royalties Inc.
- OGO.V — Organto Foods Inc.
- OGS — ONE Gas, Inc.
- OGSP — Obra High Grade Structured Products ETF
- OGSXX — JPMorgan U.S. Government Money Market Fund Premier
- OHAA — OPY Acquisition Corp. I
- OHAAU — OPY Acquisition Corp. I
- OHAAW — OPY Acquisition Corp. I
- OHAC — Oceanhawk Acquisition Corp. Class A Ordinary Shares
- OHACR — Oceanhawk Acquisition Corp. Rights
