Around the third round of negotiation of the transatlantic Trade and Investment Partnership (TTIP) between the European Union and the United States, European negotiators started to show a radical change in their position on intellectual property. The issue appeared from the beginning as difficult to fully include in the talks due to strong differences in views and legal traditions between the parties ; one that could create tensions and conflicts in an already complex negotiating process. However, despite negotiators reluctance, in December 2014, detailed discussions on intellectual property started between the negotiating teams. Meanwhile representative of the DG Trade of the EU mentioned their intention to satisfy the "wish list" of the industry during public meetings with civil society. The proposed paper will examine what sorts of collective action and political beliefs are actively contributing to shape negotiators objectives and can explain such a change in negotiating goals and strategies.