- NZSTF — NZX Limited
- NZTCF — Spark New Zealand Limited
- O — Realty Income Corporation
- OABI — OmniAb, Inc.
- OABIW — OmniAb, Inc.
- OACC — Oaktree Acquisition Corp. II
- OACCU — Oaktree Acquisition Corp. III Life Sciences Unit
- OACCW — Oaktree Acquisition Corp. III Life Sciences
- OACP — OneAscent Core Plus Bond ETF
- OAEM — OneAscent Emerging Markets ETF
- OAIM — OneAscent International Equity ETF
- OAK.AX — Oakridge International Limited
- OAKG — Oakmark Global Large Cap ETF
- OAKI — Oakmark International Large Cap ETF
- OAKM — Oakmark U.S. Large Cap ETF
- OAKV — Oak View Bankshares, Inc.
- OALC — OneAscent Large Cap Core ETF
- OAM.V — OverActive Media Corp.
- OAMCF — OverActive Media Corp.
- OARFF — Fort St. James Nickel Corp.
- OARK — YieldMax Innovation Option Income Strategy ETF
- OASC — OneAscent Small Cap Core ETF
- OATN — O.A.T., Inc.
- OB1.AX — Orbminco Limited
- OBA — Oxley Bridge Acquisition Limited
- OBAI — Our Bond, Inc.
- OBAWU — Oxley Bridge Acquisition Limited Unit
- OBAWW — Oxley Bridge Acquisition Limited
- OBCN — Obocon, Inc.
- OBDC — Blue Owl Capital Corporation
- OBE — Obsidian Energy Ltd.
- OBE.TO — Obsidian Energy Ltd.
- OBGRF — Orbit Garant Drilling Inc.
- OBIIF — OBIC Co.,Ltd.
- OBIL — US Treasury 12 Month Bill ETF
- OBIO — Orchestra BioMed Holdings, Inc.
- OBK — Origin Bancorp, Inc.
- OBL.AX — Omni Bridgeway Limited
- OBM.AX — Ora Banda Mining Limited
- OBND — State Street Loomis Sayles Opportunistic Bond ETF
- OBOR — KraneShares MSCI One Belt One Road Index ETF
- OBSJF — Obrascón Huarte Lain, S.A.
- OBT — Orange County Bancorp, Inc.
- OBTEF — Orbital Corporation Limited
- OBX — Obsidian Therapeutics Inc.
- OBYCF — Obayashi Corporation
- OC — Owens Corning
- OCA.AX — Oceania Healthcare Limited
- OCAC — Ocean Capital Acquisition Corporation
- OCANF — OceanaGold Corporation
- OCC — Optical Cable Corporation
- OCC.AX — Orthocell Limited
- OCCIN — OFS Credit Company, Inc.
- OCDDY — Ocado Group plc
- OCDGF — Ocado Group plc
- OCEA — Ocean Biomedical, Inc.
- OCEEF — Transoceanic Investments Inc.
- OCFC — OceanFirst Financial Corp.
- OCG — Oriental Culture Holding Ltd.
- OCG.TO — Outcrop Silver & Gold Corporation
- OCGN — Ocugen, Inc.
- OCGPF — Oceana Group Limited
- OCGSF — Outcrop Silver & Gold Corporation
- OCI.V — Orecap Invest Corp.
- OCINF — OCI N.V.
- OCIO — ClearShares OCIO ETF
- OCL.AX — Objective Corporation Limited
- OCLCF — Oracle Corporation Japan
- OCLDF — Orica Limited
- OCLDY — Orica Limited
- OCLG — Oncologix Tech, Inc.
- OCLN — OriginClear, Inc.
- OCLTU — OceanLight Acquisition Corporation Units
- OCN.AX — Oceana Lithium Limited
- OCNB — Oconomowoc Bancshares, Inc.
- OCO.V — Oroco Resource Corp.
- OCPNF — Olympus Corporation
- OCS — Oculis Holding AG
- OCSL — Oaktree Specialty Lending Corporation
- OCT.AX — Octava Minerals Limited
- OCTH — Innovator Premium Income 20 Barrier ETF
- OCTJ — Innovator Premium Income 30 Barrier ETF
- OCTT — AllianzIM U.S. Equity Buffer10 Oct ETF
- OCTV — Octave Intelligence plc
- OCTW — AllianzIM U.S. Equity Buffer20 Oct ETF
- OCTX — Octagon 88 Resources, Inc.
- OCTZ — TrueShares Structured Outcome (October) ETF
- OCUL — Ocular Therapeutix, Inc.
- OD6.AX — OD6 Metals Limited
- ODA.AX — Orcoda Limited
- ODC — Oil-Dri Corporation of America
- ODD — Oddity Tech Ltd.
- ODDAF — Odd Burger Corporation
- ODDS — Pacer BlueStar Digital Entertainment ETF
- ODE.AX — Odessa Minerals Limited
- ODERF — Odakyu Electric Railway Co., Ltd.
- ODFL — Old Dominion Freight Line, Inc.
- ODHY — Obra Defensive High Yield ETF
- ODMUF — Old Mutual Limited
- ODTE — VegaShares SPX NDX RTY Premium Income ETF
