EU Coordinating Competences. Hardening Norms in European Socio-Economic Governance. Tatevik Manucharyan. Defended 28 January 2025

Democracy, Control, Legitimacy: Separation of Powers and EU Trade and Investment Policy. Piotr Krajewski. Defended 2 June 2025

Indulging in Paradise? EU law and policy of holiday air travel through the lens of practice theory. Yannick van den Berg (joint PhD with ACT). Defended 26 June 2025.

States Capabilities of Least-Developed Countries to Access Pandemic Vaccines. EU and India's Legal and Regulatory Influence. Pramiti Parwani. Defended 12 November 2025.

Foreign Investment Screening in the European Union. The State of Exception in Investment Law. Jochem de Kok. Defended 10 December 2025

• The EU’s Role in the Development or Demise of International Criminal Law. Teresa Cabrita (also member of ACIL). Defended 11 January 2023
• A European Pillar of Social Rights: Expectations, Implementation and Potential Impact on the EU’s Performance in the Protection of Social Rights. Sophie Dura. Defended 28 March 2023
• Discovering and creating European human rights, the Netherlands 1945-1995. Wiebe Hommes. Defended 19 April 2023
• Transgovernmental cooperation networks and norm formation processes for the protection of migrant workers in Asia. Pedro Miguel Vicente Pereira de Sena (external PhD Candidate; also Department of Constitutional Law). Defended 26 April 2023
• Balancing Competition and Non-Competition Interests: Towards a European Toolkit
  Or Brook, defended: 24 May 2019

• A rights-based approach to statelessness. Katja Swider, defended: 5 July 2018
• Judging European Democracy - National Constitutional Review of European Law and its Democratic Legitimacy. Nik de Boer, defended cum laude: 4 May 2018
• Public Play upon Private Standards. How European and International Economic Law enter into Voluntary Regimes for Sustainability. Enrico Partiti (also member of ACIL), defended: 20 April 2017
• Living Transparency. The development of access to documents in the Council of the EU and its democratic implications. Maarten Hillebrandt, defended: 10 March 2017
• Commission Loyalty: A Fiduciary Approach to Delegated and Implementing Acts​. Eljalill Tauschinsky, defended: 2 December 2016
• The European Parliament's Quest for Representative Autonomy: An Internal Perspective. Kathalijne Buitenweg, defended: 23 September 2016
• Participation in European Agencies: Keeping Promises in Institutional Practice. Sara Pernuš, defended: 24 June 2016
• Secrecy and Oversight in the European Union: The Law and Practice of Classified Information. Vigjilenca Abazi, defended: 11 December 2015
• Frontiers of Equality in the Development of EU and US Citizenship. Jeremy Bierbach, defended 2 September 2015
• A Silent Revolution.The Expansion of EU Power in the Field of Human Health. A rights-based analysis of EU health law & policy. Anniek de Ruijter, defended 16 January 2015
• Copyright Law-Making in the EU: an analysis of the European Union’s legislative competence in the field of copyright. Ana Ramalho (also IVIR), defended 10 January 2014
• The Effectiveness of Compliance Mechanisms. The EU infringement procedures and alternatives compared. Catharina Koops (also ACIL), defended 13 March 2014
• Sanctions in EU Competition Law: principles and practice. Michael Frese, defended 22 November 2012 
• Autonomie van de nationale rechter in het Europees recht (The autonomy of the national judge in European Law). Herman van Harten, defended 1 July 2011
• Law, Practice and Convention in the Constitution of the European Union. Thomas Beukers, defended 19 April 2011     
• Het begrip mededingingsbeperking zoals neergelegd in artikel 101(1) VWEU : een beslismodel. Edith Loozen, defended 19 March 2010