Telefónica Deutschland Holding AG is a leading Telecommunication Services company based in Germany, known for its low-risk ESG score of 10.5. As a subsidiary of Telefonica, it provides integrated network operations, offering mobile and fixed-network services for both private and business customers. With its core brand O2, Telefónica Deutschland Holding AG also collaborates with secondary brands and partners like ALDI TALK, Tchibo MOBIL, NettoKOM, AY YILDIZ, and Ortel Mobile, as well as service providers like Freenet.