The Members of the Joint Undertaking are the following:
- the European Union, represented by the Commission;
- Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Montenegro, the Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and Turkey;
- the European Technology Platform for High-Performance Computing (ETP4HPC) Association and the Big Data Value Association (BDVA).
Other Member States or countries associated to Horizon 2020 are able to become members, provided that they accept the Statutes and commit to contribute to the achievement of the objectives of the Joint Undertaking.
Any legal entity established in a Member State or country associated to Horizon 2020 that supports research and innovation may apply to become a private member state of the Joint Undertaking. In this case, the Governing Board is in charge of assessing and deciding on the application taking account the relevance and the added value of the applicant as respects the achievement of the objectives of the Joint Undertaking.