| Symbol | Name | Country | Exchange |
|---|---|---|---|
| ONPH | Oncology Pharma Inc. | US | OTC |
| OPHLF | Ono Pharmaceutical | US | OTC |
| ORXOY | Orexo Ab ADR | US | OTC |
| OTLC | Oncotelic Therapeutics, Inc | US | OTC |
| PFGTF | Pacific Edge Ltd | US | OTC |
| PHRX | Pharmagen, Inc | US | OTC |
| PMCB | Pharmacyte Biotech Inc | US | OTC |
| PPCB | Propanc Biopharma Inc. | US | OTC |
| PRRUF | Immutep Ltd | US | OTC |
| PTCHF | PureTech Health plc | US | OTC |
| PTLF | Petlife Pharmaceuticals Inc | US | OTC |
| RGBP | Regen Biopharma Inc | US | OTC |
| RGBPP | Regen BioPharma, Inc | US | OTC |
| RHHBF | Roche Holding AG | US | OTC |
| RHHVF | Roche Holding AG | US | OTC |
| RNVA | Rennova Health Inc | US | OTC |
| ROSGQ | Rosetta Genomics Ltd | US | OTC |
| SBHGF | SBI Holdings, Inc | US | OTC |
| SCIE | SpectraScience, Inc | US | OTC |
| SGIOF | Shionogi & Co Ltd | US | OTC |