- Onexon GmbH
- Rebbergstrasse 13
- Bibern
- SH
- ONNEN Recht GmbH
- Bühlstrasse 15
- Schaffhausen
- SH
- Onsign GmbH
- Mühlegasse 2
- Thayngen
- SH
- Online Services GmbH in Liquidation
- Klausweg 64
- Schaffhausen
- SH
- onfontana GmbH
- Obere Buckstrasse 30
- Hallau
- SH
- one way fashion and more ag in Liquidation
- Vordergasse 6
- Schaffhausen
- SH
- ONDUR Engineering AG
- Schützengraben 20
- Schaffhausen
- SH
- Onkologie-Schaffhausen AG
- Rheinstrasse 17
- Schaffhausen
- SH
- ONE DECISION by Brasser
- Badische Bahnhofstrasse 23
- Neuhausen am Rheinfall
- SH