- Office fédéral des assurances sociales OFAS
- Office fédéral du développement territorial ARE
- Office fédéral du personnel OFPER
- Office Zug AG
- Officines
- Ofico Fiduciaire SA
- OFRAG Vertriebsgesellschaft
- Ogilvy AG
- OIKEN SA
- Oilfield Insurance Agencies Ltd., London, Zurich Branch
- OK JOB AG
- OK JOB MEDICAL
- Ok Job S.A.
- OK JOB SA
- Ok Job SA
- OK Job SA
- OKJOB
- OKJOB MEDICAL
- OKJOB Neuchâtel MEDICAL
- OKJOB SA
- ÖKK
- Olbrecht & Weber AG
- Old Fashion Bar AG
- OLF SA
- Olliscience SA
- Olmero AG
- OLWO AG
- Olympe S.A.
- Olympus Schweiz AG
- om computer support ag
- OM PHARMA
- OM Pharma
- Omega SA
- Omni Ray AG
- Omnicom SA
- Omnisens SA
- Omnitax AG Wirtschafts- und Steuerrecht
- Omya (Schweiz) AG
- Omya AG
- Omya International AG
- Omya Management AG
- Onassis Foundation
- ONAX AG - it solutions
- Ondemand Agility Solutions AG
- ONE Agency
- ONE Asset Management AG
close