The agreement with ACS also envisages a provision should ACS sell the shares acquired from Atlantia at a higher price to a third party in the 12 months after the closing of the deal.

In Frankfurt, shares in German building company Hochtief spiked after the deal was announced to match the price agreed.($1 = 1.0016 euros)

(Reporting by Maria Pia Quaglia; Editing by Keith Weir)