- WWZ Energie AG
- Wyhus Belp AG
- Wymed AG
- Wyniger Gruppe
- Wyniger Management AG
- Wyss & Partner AG
- Wyss Samen und Pflanzen AG
- Wyss Zäune AG
- Wyssen Seilbahnen AG / Wyssen Avalanche Control AG
- X-Ray AG
- X-Rite Europe GmbH
- XAL Schweiz
- Xaver Meyer AG
- Xebia Switzerland
- Xebia Switzerland
- Xeloba
- Xeloba GmbH
- xorlab AG
- Xovis AG
- XR VAP
- XS Stellen AG
- Xstream Park S.A.
- Xydec SA
- Xylem Water Solutions Ltd
- Y & E Chevalley Automobiles S.A.
- Yachtschule Robina
- Yade GmbH
- Yapeal AG
- Yildiz Meral
- YLEX AG
- Yodea Recrutement
- Yokoy Group AG
- Yonder AG
- Yoojo
- YOTEL Geneva Lake
- YOUHEY Communication AG
- Younergy Solar (Suisse) SA
- Younitec AG
- Youplus Assurance AG
- YOURCAREERGROUP Schweiz GmbH
- Yova AG
- Ypsomed AG
- Yu-An
- Yuh SA
- Yusen Logistics
- Yves Rocher
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