The ABC Global Alliance established in 2016 as an initiative of the European School of Oncology and now registered as a non-profit association in Portugal, is a multi-stakeholder platform for all those interested in collaborating on common projects relating to advanced breast cancer (ABC) around the world. We are made up of people and organisations who are committed to develop, promote and support tangible improvements that will ultimately create awareness and actions that will improve and extend the lives of patients living with ABC worldwide.