Deutsche Telekom AG is one of the world’s leading integrated telecommunications companies, headquartered in Bonn, Germany, serving customers across Europe and the United States through T-Mobile US. Founded in 1995, the company pursues an ESG strategy spanning climate protection, energy efficiency, circular economy, digital participation, and responsible governance, aiming for net-zero emissions across its value chain by 2040.

Telefónica, S.A. is a Spanish multinational telecommunications operator and one of the largest integrated telecom groups in Europe and Latin America, offering fixed, mobile and digital services under brands including Movistar, O2 and Vivo. Headquartered in Madrid, it serves hundreds of millions of customers, with commitments on decarbonisation, digitalisation and responsible governance.

Verizon Communications Inc. is one of the largest telecommunications companies in the United States, providing wireless network services, broadband, fibre and business connectivity to consumers and enterprises. Headquartered in New York City, its responsible-business strategy focuses on digital inclusion, climate protection and human prosperity.

BT Group plc is the United Kingdom’s leading fixed and mobile telecommunications and network provider, operating consumer brands EE, BT and Plusnet as well as the Openreach access network and a global business division. Headquartered in London, it serves customers across the UK and in around 180 countries under its purpose to connect for good.