| Symbol | Name | Country | Exchange |
|---|---|---|---|
| LGL | LGL Group, Inc. (The) | US | AMEX |
| 004770 | Sunny Elec | KR | KO |
| 002199 | Zhejiang East Crystal Electronic Co Ltd | CN | SHE |
| 603688 | Jiangsu Pacific Quartz Co Ltd | CN | SHG |
| 603738 | Hubei TKD Crystal Electn | CN | SHG |
| 300460 | Guangdong Failong Crystal Technology Co Ltd | CN | SHE |
| 3221 | Tai-Saw Technology Co Ltd | TW | TWO |
| 6174 | Aker Technology Co Ltd | TW | TWO |
| 8182 | Harmony Electronics | TW | TWO |
| 8289 | Taitien Electronics Co Ltd | TW | TWO |
| 5434 | Topco Scientific Co Ltd | TW | TW |