- online-office Kessler & Co.
- Unterbach 14
- Trogen
- AR
- Onterra Invest AG
- Hof 786
- Lutzenberg
- AR
- Online Marketing Editions GmbH in Liquidation
- Schützenstrasse 38 o
- Herisau
- AR
- ONIX Swiss AG in Liquidation
- Bahnhofstrasse 19
- Herisau
- AR
- Ontarius AG in Liquidation
- Poststrasse 1
- Herisau
- AR
- ON SITE SERVICE - Reis Christian
- Im Mühlebühl 24
- Herisau
- AR
- Online Shop Services AG
- Bleichelistrasse 22
- Bühler
- AR
- OnTopAir Charter AG
- Schwendistrasse 5
- Schachen b. Reute
- AR