The first meeting of the board of directors of the combined company will take place on 4 April. The composition of the new board and the senior management team is expected to be announced then.
Global headquarters of the merged company will remain in Zamudio, Spain, as will the onshore offices.
Offshore development will be operated from Hamburg in Germany and Vejle in Denmark.
Siemens owns 59% of the merger’s shared capital, with Iberdrola holding 8% and the remainder floating.