Azienda Trasporti Milanesi
| Company type | Società per azioni |
|---|---|
| Predecessor | SAO (until 1893) Edison (until 1917) |
| Founded | 1931 |
| Headquarters | , |
Area served | Milan metropolitan area |
Key people | Gioia Ghezzi (President) |
| Services | Public transport |
| Revenue | €903.097 million (2010) |
| €6.831 million (2010) | |
| Owner | Municipality of Milan |
Number of employees | 9800 (2018) |
| Subsidiaries | ATM servizi, Guidami, GESAM, Nord est trasporti (93.5%), Nuovi trasporti lombardi (74.5%), Mipark (51%), Perotti (51%), International Metro Service (Copenhagen Metro) (51%) |
| Website | www |
Azienda Trasporti Milanesi S.p.A. ("Milanese Transports Company JSC"; ATM) is the municipal public transport company of Milan and 46 surrounding metropolitan municipalities. It operates 5 metro lines (see Milan Metro), 17 tram lines (see Trams in Milan), 122 bus lines and 4 trolleybus lines (see Trolleybuses in Milan), carrying about 776 million passengers in 2018.
ATM manages other minor transport services in Lombardy as well. These include Radiobus, a demand-responsive minibus service; the Cascina Gobba–San Raffaele people mover; the Como–Brunate funicular; the BikeMi bike sharing service. Furthermore, since 2008, it has been operating the Copenhagen Metro in Denmark. Since November 2024 it has also been leading (51%) the operation of the Thessaloniki Metro in partnership with Egis Group (49%).