The splitting of the airport authorities is proceeding in two phases. First step, last October, was the renaming of Aer Rianta to Dublin Airport Authority plc and the creation of Shannon Airport Authority plc and Cork Airport Authiority plc with new boards. Note that this meant all of Aer Riantas assets, including all three airports, still belong to the DAA for now. The next step, pending the acceptance by the government of business plans from the two new authorities, is to transfer Cork and Shannon airports to their respective new authorities. This should happen by May but for now, the management in those airports still have to get stuff signed off by DAA.
All three companies are government owned but the reorganisation clearly takes account of the current administration's ideas for privatisation.