- ipso Bildung AG
- iptiQ
- IQ Plus AG
- Iqra Technology
- IQVIA AG
- IQVIA AG, Branch Rotkreuz
- Irene M. Staehelin Foundation
- IRF Reputation AG
- Irian Solutions GmbH
- IROL
- Irpd AG
- IRS - Institut de Radiologie de Sion
- IRV - VKF
- IS SaveEnergy AG
- Isadora AG International
- ISBA AG
- ISEKI France S.A.S., Aubière, Zweigniederlassung Fischbach-Göslikon
- ISG Personalmanagement Schweiz
- ISMECA EUROPE SEMICONDUCTOR SA
- ISO - Organisation Internationale de Normalisation
- Iso Chape S.à.r.l
- isolutions AG
- ISOMET AG
- Isotec GmbH
- ISP Electro Solutions AG
- ISPIN AG
- ISRF SA
- ISS Facility Services AG
- ISS Schweiz AG
- IST Investmentstiftung
- IST-Edelstahl-Anlagenbau AG
- IST-Edelstahl-Anlagenbau AG
- ista swiss ag
- IT Advanced Consulting
- IT Service Center
- IT-Services
- IT-Tech Personal AG
- IT'IS Foundation
- IT3 Treuhand + Immobilien AG
- ITech Consult AG
- Itema (Switzerland) Ltd.
- ITIVITY AG
- ITpoint Systems AG
- ITRIS Maintenance AG
- ITRIS Maintenance SA
- ITRIS One AG
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