| Symbol | Name | Country | Exchange |
|---|---|---|---|
| MSA | Mine Safety Appliances Company | US | NYSE |
| AATGF | Ati Airtest Tech Inc | US | OTC |
| BLKLF | Blackline Safety Corp | US | OTC |
| DRW3 | Drägerwerk AG & Co. KGaA | DE | F |
| 002658 | Beijing SDL Technology Co Ltd | CN | SHE |
| 300007 | Henan Hanwei Electronics Co | CN | SHE |
| 688665 | Cubic Sensor and Instrument Co Ltd | CN | SHG |
| 300701 | Nanyang Senba Optical and Electronic Co Ltd | CN | SHE |
| 1533 | Mobiletron Electronics Co Ltd | TW | TW |
| 4919 | Nuvoton Technology Corp | TW | TW |
| DWRKF | Draegerwerk Ag | US | OTC |