Foreword

Dear readers,

we live in a time of change – full of challenges, but also full of opportunities. As a telecommunications provider, we bear a special responsibility: We connect people, businesses, and ideas – and thus help shape the digital future of our country.

The year 2025 was a year of transition for us. With the completion of our Responsible Business Plan 2025, we laid a strong foundation: about 80% of our sustainability goals have been achieved or are on track, our grid is based on 100% renewable energy, and our Path to Net Zero by 2040 is clearly defined. These achievements have not only been recognised with awards such as the EcoVadis Gold Score and the ESG Transparency Award – they also demonstrate what is possible when conviction meets action.

Because taking responsibility for the environment and society is not an obligation for us, on the contrary:

“Sustainability is part of how we see ourselves and a key driver for innovation, efficiency and growth.”

Therefore, we already voluntarily report our ESG data in accordance with the Corporate Sustainability Reporting Directive (CSRD) of the European Union. We published our first CSRD-compliant Group Sustainability Report in 2024, and in 2025, we will create transparency and invite dialogue with this ESG Factbook and the O₂ Telefónica ESG microsite.

Our mission remains: We want to offer everyone the best digital experience – with a high-performance, reliable network, services and products that make everyday life easier, and a clear commitment to responsible business practices. We combine digitalisation and sustainability, rely on artificial intelligence, promote participation, and build structures that are resilient and future-proof.

“We take our responsibility seriously and are convinced of the economic added value of sustainable practices.”

We believe O₂ Telefónica has the potential to be more than just a telecommunications company. We can be a true enabler – for a society that is becoming more digital, sustainable, and just. This requires courage, clarity, and collaboration. That is precisely the core of our new corporate strategy, Transform & Grow – and precisely the path we want to take together.

Let us resolutely continue down this path – with the firm intention of shaping the future.

Cordially,