| Symbol | Name | Country | Exchange |
|---|---|---|---|
| LSRCF | Lasertec Corp | US | OTC |
| LSRCY | Lasertec Corp | US | OTC |
| NINOY | Nikon Corporation | US | OTC |
| OCPNF | Olympus Corp | US | OTC |
| OCPNY | Olympus Corp SP ADR | US | OTC |
| RNSHF | Renishaw Plc .20 Par | US | OTC |
| SOTGY | Sunny Optical Tech ADR | US | OTC |
| TOPCF | Topcon Corp | US | OTC |
| JDG | Judges Scientific Plc | UK | LSE |
| OXIG | Oxford Instruments Plc | UK | LSE |
| 106520 | Digital Optics Co. Ltd | KR | KQ |
| 600071 | Phenix Optical Co Ltd | CN | SHG |
| JELLF | Jeol Ltd | US | OTC |