On 1 January 2016, Leonardo-Finmeccanica became a single industrial company by integrating the activities of its subsidiaries AgustaWestland, Alenia Aermacchi, DRS Technologies, Selex ES, OTO Melara and WASS.

In 1989, an internal IRI reorganization process brought STET electronic enterprises to Finmeccanica, and the Aeritalia-Selenia merger constituted its aerospace subsidiary Alenia.

[5] In 1992 EFIM was wound up because of its troubled financial situation; and Agusta, Oto Melara, Officine Galileo and Breda passed to Finmeccanica, which became one of the main Italian industrial groups.

According to Finmeccanica emails published in the Syria Files release by WikiLeaks on 5 July 2012,[12] Finmeccanica increased its sale of mobile communications equipment to Syrian authorities during 2011, delivering 500 of these to the Damascus suburb Muadamia in May 2011,[13][14] after the Syrian uprising had started, and sending engineers to Damascus in February 2012 to provide training in using the communications equipment in helicopter terminals,[15] while the uprising continued.

In the first half of 2014, Finmeccanica's new Chief Executive Officer and General Manager Mauro Moretti started a significant process of change for the Group, both in terms of strategic choices and organizational structure.

The goal was to create a more cohesive and efficient group in which all processes (research, marketing and sales, engineering, procurement, strategies and governance) are centralized and integrated and can interact each other.

[19] This encompasses the 100% owned companies of the core aerospace and defence business (AgustaWestland, Alenia Aermacchi, Oto Melara, Selex ES and WASS) being transformed into seven new Finmeccanica divisions.

FATA, another subsidiary of the Finmeccanica Group since 2004 that was not part of the core business, was sold in 2015 to the Gruppo Danieli, dealing in the production of steel plants.

On 1 January 2016, Finmeccanica became a single integrated industrial entity, that absorbed the activities of AgustaWestland, Alenia Aermacchi, Selex ES, OTO Melara and WASS.

In December 2021, Leonardo Electronics announced it would be building a semiconductor device fabrication facility in Oro Valley, Arizona with construction beginning in the first half of 2022.