| OFS Credit Company, Inc. (OCCIP) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Onconova Therapeutics, Inc. (ONTXW) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Oncternal Therapeutics, Inc. (ONCT) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| One Stop Systems, Inc. (OSS) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| OneSpan Inc. (OSPN) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| OneSpaWorld Holdings Limited (OSW) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| OP Bancorp (OPBK) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Opera Limited (OPRA) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Opes Acquisition Corp. (OPES) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Opes Acquisition Corp. (OPESU) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Opes Acquisition Corp. (OPESW) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| OpGen, Inc. (OPGNW) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Oportun Financial Corporation (OPRT) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| OptimizeRx Corporation (OPRX) NASDAQ - National Association of Securities Dealers Automated Quotations | |
| Orchard Therapeutics plc (ORTX) NASDAQ - National Association of Securities Dealers Automated Quotations | |