| Symbol | Name | Country | Exchange |
|---|---|---|---|
| HTLZF | Hamilton Thorne Ltd | US | OTC |
| INRD | Inrad Optics Inc | US | OTC |
| 1930 | Shinelong Automotive Lightweight Application Ltd | HK | HK |
| 600363 | Jiangxi Lianchuang Opto-electronic Science & Technology Co Ltd | CN | SHG |
| 300489 | Optics Technology Holding Co Ltd | CN | SHE |
| IMCO | IMCO Industries Ltd | IL | TA |