- EO Tech GmbH
- Paradisstrasse 10
- Mörschwil
- SG
- EOSA AG
- Schmiedgasse 19
- St. Gallen
- SG
- EOS Electro-Oil Service AG
- Rosenhalde 17c
- Rorschach
- SG
- eoss INFORMATIK AG
- Burgerrietstrasse 13
- Uznach
- SG
- EOS Energy Solutions AG
- Edisonstrasse 9
- St. Gallen
- SG
- EO Gastro Çoban
- Bahnhofstrasse 113
- Uzwil
- SG
- EOBTI Edwin Ott Buchhaltung Treuhand Informatik
- Rebhalde 8
- Jona
- SG