This dataset aims to provide a list of installation entries and exits into and from the EU ETS. To the extent possible, we also specify the reason for an identified entry/exit. Almost twenty years have passed since the EU ETS started operating, and keeping track of firm dynamics in the EU ETS – which the EU ETS itself could potentially affect – has become increasingly important. Knowing whether an observed entry reflects new production capacity, increased production capacity, a change in EU ETS legislation, or a mere administrative decision would allow studies on the impact of the EU ETS on firm dynamics and, more generally, increase the quality of studies on economic performance. The methodology for estimating installation entries and exits builds upon the work of (Verde, Graf, & Jong, 2019).