Hitachi Rail STS
 | |
| Formerly | Ansaldo STS (2006) |
|---|---|
| Type | Subsidiary |
| ISIN | IT0003977540  |
| Industry | Engineering |
| Predecessor | Gio. Ansaldo & C. and Hitachi Rail Italy |
| Founded | 2006 |
| Headquarters | , |
| Key people | Luca D'Aquila (Chairman) |
| Services | Railway signalling and control systems, railway design, engineering and maintenance |
| Revenue | €2,956 million (2025) |
| €118.5 million (2018) | |
| €348.9 million (2025) | |
Number of employees | 4,574 (2026) |
| Parent | Hitachi |
| Subsidiaries | Union Switch & Signal (1988–2009) |
| Website | hitachirail.com |
Hitachi Rail STS SpA (from Hitachi Rail Signalling and Transportation Systems), formerly Ansaldo STS, is an Italian transportation company owned by Hitachi with a global presence in the field of railway signalling and integrated transport systems for passenger traffic (railway/mass transit) and freight operations. Hitachi Rail STS plans, designs, manufactures, installs and commissions signaling systems, components and technologies for the management and control of newly built or upgraded railways, transit and freight lines worldwide.
Headquartered in Naples, Italy, it is a wholly owned subsidiary of Hitachi Rail. It was previously listed on the Borsa Italiana and was a component of the benchmark FTSE Italia Mid Cap Index.
Providing design, manufacture, installation, integration and maintenance of a wide range of train control systems and equipment, Hitachi Rail STS employs 4,574 people as of 2026.