T-systems Schweiz AG
Ownership
T-systems Schweiz AG is ultimately owned by Deutsche Telekom .
Also owned by Deutsche Telekom
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Ben NL 
Crnogorski Telekom Similar companies
In Mobile Networks, under different ownership.
Sources
- T-Systems Schweiz AG — GLEIF
Who really owns the brands you use
T-systems Schweiz AG is ultimately owned by Deutsche Telekom .
In Mobile Networks, under different ownership.