Final answer:
The largest government privatizing in the EU as of 2015 was Greece, influenced by its financial crisis and the subsequent economic policies imposed by international institutions.
Step-by-step explanation:
The largest government privatizing in the EU as of 2015 was Greece. Countries undergo privatization to transition from a government-run system to one where private entities own and operate services that were previously managed by the state. Greece, particularly in response to its economic crisis and as part of fiscal austerity measures, had to engage in the privatization of a number of its public services. This was part of the conditions set by international institutions such as the World Bank and the IMF. Germany, the UK, and Portugal have also seen privatization, but Greece's efforts were among the most significant during this period due to its financial difficulties and the requirements of its international bailout.