- O — REALTY INCOME CORP
- OABI — OmniAb, Inc.
- OBAI — Our Bond, Inc.
- OBE — OBSIDIAN ENERGY LTD.
- OBEL.BR — ORANGE BELGIUM
- OBIO — Orchestra BioMed Holdings, Inc.
- OBK — Origin Bancorp, Inc.
- OBL.WA — Orzeł Biały S.A.
- OBS.VI — Oberbank AG
- OBSRV.OL — OBSERVE MEDICAL ASA
- OBT — Orange County Bancorp, Inc. /DE/
- OC — Owens Corning
- OCC — OPTICAL CABLE CORP
- OCFC — OCEANFIRST FINANCIAL CORP
- OCGN — Ocugen, Inc.
- OCI.AS — OCI N.V.
- OCUL — OCULAR THERAPEUTIX, INC
- ODC — Oil-Dri Corp of America
- ODD — Oddity Tech Ltd
- ODF.OL — ODFJELL SE
- ODFL — OLD DOMINION FREIGHT LINE, INC.
- ODTX — Odyssey Therapeutics, Inc.
- ODV — Osisko Development Corp.
- ODYS — Odysight.ai Inc.
- ODYY — Odyssey Health, Inc.
- OEC — Orion S.A.
- OEC.MI — Ops Ecom S.P.A.
- OEM-B.ST — OEM International Aktiebolag
- OESX — ORION ENERGY SYSTEMS, INC.
- OFG — OFG BANCORP
- OFIX — Orthofix Medical Inc.
- OFLX — Omega Flex, Inc.
- OFRM — Once Upon a Farm, PBC
- OGE — OGE ENERGY CORP.
- OGEN — ORAGENICS INC
- OGI — ORGANIGRAM GLOBAL INC.
- OGN — Organon & Co.
- OGS — ONE Gas, Inc.
- OHI — OMEGA HEALTHCARE INVESTORS INC
- OHLA.MC — OBRASCON HUARTE LAIN, S.A.
- OI — O-I Glass, Inc. /DE/
- OII — OCEANEERING INTERNATIONAL INC
- OIS — OIL STATES INTERNATIONAL, INC
- OKE — ONEOK INC /NEW/
- OKEAC.CO — Det Østasiatiske Kompagni A/S
- OKLO — Oklo Inc.
- OKTA — Okta, Inc.
- OKUR — OnKure Therapeutics, Inc.
- OLB — OLB GROUP, INC.
- OLE.MC — DEOLEO SA
- OLED — UNIVERSAL DISPLAY CORP \PA\
- OLI.MI — OLIDATA S.P.A.
- OLLI — Ollie's Bargain Outlet Holdings, Inc.
- OLMA — Olema Pharmaceuticals, Inc.
- OLN — OLIN Corp
- OLP — ONE LIBERTY PROPERTIES INC
- OLPX — OLAPLEX HOLDINGS, INC.
- OLTH.AT — ΟΡΓΑΝΙΣΜΟΣ ΛΙΜΕΝΟΣ ΘΕΣΣΑΛΟΝΙΚΗΣ Α.Ε.
- OLVAS.HE — Olvi Oyj
- OLYMP.AT — ΤΕΧΝΙΚΗ ΟΛΥΜΠΙΑΚΗ ΑΝΩΝΥΜΟΣ ΕΤΑΙΡΕΙΑ
- OM — Outset Medical, Inc.
- OMAB — Central North Airport Group
- OMC — OMNICOM GROUP INC.
- OMCC — OLD MARKET CAPITAL Corp
- OMCL — OMNICELL, INC.
- OMDA — Omada Health, Inc.
- OMER — OMEROS CORP
- OMEX — ODYSSEY MARINE EXPLORATION INC
- OMF — OneMain Holdings, Inc.
- OMQS — OMNIQ Corp.
- OMV.VI — OMV AKTIENGESELLSCHAFT
- ON — ON SEMICONDUCTOR CORP
- ONB — OLD NATIONAL BANCORP /IN/
- ONC — BeOne Medicines Ltd.
- ONCIN.OL — Oncoinvent Asa
- ONCO.ST — Oncopeptides AB
- ONCY — ONCOLYTICS BIOTECH INC
- OND.WA — ONDE Spółka Akcyjna
- ONDS — Ondas Inc.
- ONEW — OneWater Marine Inc.
- ONFO — Onfolio Holdings, Inc
- ONIT — ONITY GROUP INC.
- ONL — Orion Properties Inc.
- ONMD — OneMedNet Corp
- ONON — On Holding AG
- ONT — Onterris, Inc.
- ONTEX.BR — ONTEX GROUP
- ONTO — ONTO INNOVATION INC.
- OOMA — OOMA INC
- OPAL — OPAL Fuels Inc.
- OPBK — OP Bancorp
- OPCH — Option Care Health, Inc.
- OPEN — Opendoor Technologies Inc.
- OPFI — OppFi Inc.
- OPHC — OptimumBank Holdings, Inc.
- OPK — OPKO HEALTH, INC.
- OPL.WA — ORANGE POLSKA S.A.
- OPLN — OPENLANE, Inc.
- OPM.WA — OPTEAM SPÓŁKA AKCYJNA
- OPN.WA — OPONEO.PL Spółka Akcyjna
- OPR.MI — Ops Retail S.P.A.
- OPRA — Opera Ltd
- OPRT — Oportun Financial Corp
- OPRX — OptimizeRx Corp
- OPS.MI — Ops Italia S.P.A.
- OPTI.BR — Option
- OPTIMA.AT — ΤΡΑΠΕΖΑ OPTIMA BANK A.E.
- OPTT — Ocean Power Technologies, Inc.
- OPTU — Optimum Communications, Inc.
- OPTX — SYNTEC OPTICS HOLDINGS, INC.
- OPXS — Optex Systems Holdings Inc
- OPY — OPPENHEIMER HOLDINGS INC
- OR — OR Royalties Inc.
- OR.PA — L'OREAL
- ORA — ORMAT TECHNOLOGIES, INC.
- ORA.PA — ORANGE
- ORANY — ORANGE SA
- ORBS — Eightco Holdings Inc.
- ORC — Orchid Island Capital, Inc.
- ORCL — ORACLE CORP
- ORES.ST — Investment AB Öresund
- ORGN — Origin Materials, Inc.
- ORGO — Organogenesis Holdings Inc.
- ORI — OLD REPUBLIC INTERNATIONAL CORP
- ORIC — Oric Pharmaceuticals, Inc.
- ORIO — Orion Digital Corp.
- ORIOLA.HE — Oriola Oyj
- ORK.OL — ORKLA
- ORKA — Oruka Therapeutics, Inc.
- ORLA — Orla Mining Ltd.
- ORLY — O REILLY AUTOMOTIVE INC
- ORMP — ORAMED PHARMACEUTICALS INC.
- ORN — Orion Group Holdings Inc
- ORNBV.HE — ORION CLASS B
- ORRF — ORRSTOWN FINANCIAL SERVICES INC
- ORRON.ST — Orrön Energy AB
- ORS.MI — ORSERO S.P.A.
- ORSTED.CO — ØRSTED A/S
- ORTHEX.HE — Orthex Oyj
- ORX.ST — Orexo AB
- OSBC — OLD SECOND BANCORP INC
- OSCR — Oscar Health, Inc.
- OSE.PA — OSE IMMUNOTHERAPEUTICS
- OSG — OCTAVE SPECIALTY GROUP INC
- OSIS — OSI SYSTEMS INC
- OSK — OSHKOSH CORP
- OSPN — OneSpan Inc.
- OSRH — OSR Health, Inc.
- OSS — ONE STOP SYSTEMS, INC.
- OSTX — OS Therapies Inc
- OSUR — ORASURE TECHNOLOGIES INC
- OSW — ONESPAWORLD HOLDINGS Ltd
- OTEC.OL — OTELLO CORPORATION ASA
- OTEX — OPEN TEXT CORP
- OTIS — Otis Worldwide Corp
- OTLK — Outlook Therapeutics, Inc.
- OTLY — Oatly Group AB
- OTM.WA — ZAKŁADY PRZEMYSŁU CUKIERNICZEGO OTMUCHÓW SPÓŁKA AKCYJNA
- OTOEL.AT — AUTOHELLAS A.T.E.E.
- OTOVO.OL — OTOVO ASA
- OTS.WA — OT LOGISTICS S.A.
- OTTR — Otter Tail Corp
- OUST — Ouster, Inc.
- OUT — OUTFRONT Media Inc.
- OUT1V.HE — Outokumpu Oyj
- OVBC — OHIO VALLEY BANC CORP
- OVH.PA — OVH GROUPE
- OVID — Ovid Therapeutics Inc.
- OVLY — Oak Valley Bancorp
- OVS.MI — OVS SPA
- OVTZ — OCULUS INC.
- OVV — Ovintiv Inc.
- OVZON.ST — Ovzon AB (publ)
- OWL — BLUE OWL CAPITAL INC.
- OWLT — Owlet, Inc.
- OXM — OXFORD INDUSTRIES INC
- OXUR.BR — Oxurion
- OXY — OCCIDENTAL PETROLEUM CORP /DE/
- OZ — Belpointe PREP, LLC
- OZK
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