| XNYS - New York Stock Exchange | MKS Instruments Inc. - MKSI |
| XLON - London Stock Exchange | MKS Instruments Inc. - 0JWG |
| XNAS - NASDAQ | MKS Instruments Inc. - MKSI |
| XFRA - Frankfurt Stock Exchange | MKS Instruments - MKT |
| XDUS - Düsseldorf Stock Exchange | MKS Instruments Inc. - 920343 |
| XMUN - Munich Stock Exchange | MKS Instruments - 920343 |
| XSTU - Stuttgart Stock Exchange | MKS Instruments Inc. - MKT |