Milan Metro, Italy December 3, 2022 | Europe Project Update, Project Update Developer: Azienda Trasporti Milanesi (ATM) is the project developer. Metropolitana Milanese manages the construction. The Metro 5 S.p.A. consortium of Trenitalia (36.7 per cent), Astaldi (2 per c... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password