In June 2023 the Weizenbaum Institute for the Networked Society, the Humboldt University of Berlin and the Center for Intellectual Property, Information and Technology Law (CIPLITEC) held a workshop on the - then just politically agreed - Data Act (DA). This volume contains the contributions based on the presentations by international experts, who participated in this workshop. The EU Data Act: First Assessments sheds light on the interfaces between the DA and important other fields of law that the DA will have a great impact on. The First Assessments in this volume show that there are still various open questions and conflicts with different legal areas, posing fundamental challenges to achieving the objectives envisioned by the European legislator. This volume demonstrates that it will largely be up to the CJEU to successfully synchronise these legal interfaces, on which the DA so heavily depends.Contributions written by · Martina Eckardt (Budapest, Hungary) & Wolfgang Kerber (Marburg, Germany)· Bertin Martens (Brussels, Belgium)· Thomas Weck (Frankfurt, Germany)· Herbert Zech (Berlin, Germany)· Axel Metzger (Berlin, Germany)· Axel Tanya Aplin (London, United Kingdom)· Andreas Sattler (Karlsruhe, Germany)· Benjamin Raue (Trier, Germany)· Andreas Wiebe (Göttingen, Germany)