Alstom SA is a French multinational rolling stock manufacturer operating worldwide in rail transport markets, active in the fields of passenger transportation, signalling, and locomotives, with products including the AGV, TGV, Eurostar, Avelia and New Pendolino high-speed trains, in addition to suburban, regional and metro trains, and Citadis trams.

Alsthom (originally Als-Thom) was formed by a merger between Compagnie Française Thomson-Houston and the electric engineering division of Société Alsacienne de Constructions Mécaniques in 1928. 

Alstom Transport is one of the world's largest manufacturers of high-speed trains, tramways and metros, electrical and diesel trains, information systems, traction systems, power supply systems, and track work. The company also operates in the rail infrastructure market, designing, producing, and installing infrastructure for the rail network. These include information solutions, electrification, communication systems, track laying, station utilities, as well as workshops and depots. Maintenance, rebuilding, and renovation services are also provided by the company. Alstom Transport operates in 70 countries and employs 26,000 people.

With demand for global mobility on the rise, cities and countries need transport solutions that help decrease greenhouse gas emissions, congestion, pollution and improve public health for the years to come.

Alstom’s eco-design policy consists of continuously improving the sustainability performance of its solutions by monitoring and reducing their environmental impact throughout their entire lifecycles. The priorities set in Alstom’s eco-design policy focus on : energy efficiency of rail transport systems; use of clean, recyclable, and natural materials; reduction of noise and vibrations; reduction of air emissions; and end-of-life management of products, particularly in maintenance activities.

Alstom’s objective to reduce the energy consumption of its solutions by 25% by 2025 (compared to 2014). As of March 2021, it has achieved a reduction of almost 22%

According to Wikipedia; Alstom