The group manages 9,400 km (5,800 mi) of toll motorways, Fiumicino and Ciampino airports in Italy and the three airstrips of Nice, Cannes-Mandelieu and Saint Tropez in France with more than 60 million passengers a year.

By the first agreement between ANAS signed in 1956, the companies were committed in co-financing, building and managing the Autostrada Del Sole, between Milan and Naples, inaugurated in 1964.

In January 2003 Newco28 made a tender offer, through a leveraged buyout operation: they found the liquidity necessary for the acquisition using the system credit and, consequently, the debt was transferred from Newco28 to Autostrade, following a merger by incorporation.

During 2005, a process of geographical diversification began with the acquisition of the management of approximately 2,000 km (1,200 mi) of toll motorways in Brazil, Chile, India, and Poland.

[13] During the summer of 2017, Atlantia declared the intention to make a tender offer on all the issued shares of Abertis Infraestructuras, and in October 2017 the Comision Nacional del Mercado de Valores authorised this.

[16] In June 2021, Atlantia sold its 88% stake in ASPI (comprising its largest Italian motorways) to the newly formed Holding Reti Autostradali S.p.A. (HRA).

[22] As a result, the holding company's new shareholding structure is made up of Edizione for about 57%, Blackstone for about 37.8% (through an open-end fund), and, finally, Fondazione CRT for the remaining shares.

[23][24] The shareholding structure is as follows: The group's companies are: On 14 August 2018, the Atlantia managed Morandi Bridge collapsed causing the death of 43 people.