| Ocean Bridge Co Ltd (241790) KOSDAQ - KOSDAQ Stock Market | |
| Organic Tea Cosmetics Holdings Co Ltd (900300) KOSDAQ - KOSDAQ Stock Market | |
| Orion Corp (271560) KRX - Korea Exchange | |
| Outin Futures Co Ltd (227610) KOSDAQ - KOSDAQ Stock Market | |
| Oceania Healthcare Limited Ordinary Shares (OCA) NZE - New Zealand Stock Exchange | |
| OR PAO (OBUV) MCX - Moscow Exchange | |
| Oncopeptides AB (ONCO) STO - Stockholm NASDAQ OMX | |
| Oscar Properties Holding AB (OP-PREFB) STO - Stockholm NASDAQ OMX | |
| ONESTOXXASEAN USUSD (CFN) SGX - Singapore Exchange | |
| Ocean Sky International Ltd. (1B6) SGX - Singapore Exchange | |
| O-Bank Co Ltd (2897) TPE - Taiwan Stock Exchange | |
| Oakley Capital Investments Limited (OCI) LSE - London Stock Exchange | |
| Ocelot Partners Ltd (OLOT) LSE - London Stock Exchange | |
| Oxford Biodynamics PLC (OBD) LSE - London Stock Exchange | |
| OShares FTSE Russell International Quality Dividend ETF (ONTL) NYSEARCA - NYSE Arca | |