Ansaldo Energia is the Finmeccanica specialist in the production of energy. It operates on the international market for customers including governments, independent power producers and industrial users. The company offers a complete and largely proprietary range of products, including single or combined cycle, atomic energy and services.

Finmeccanica is active in the railroad business through the design, development and production of rolling stock, signalling gear and complete urban transport systems.

ANSALDO STS controls Ansaldo Signal N.V., which operates in the field of railway and urban transport signalling, and Ansaldo Trasporti-Sistemi Ferroviari S.p.A., whose skills lay in the integration of systems and technologies for the supply of turnkey rail and mass transit systems.
AnsaldoBreda is the Finmeccanica company that builds rolling stock for mass transit systems.