Alenia Marconi Systems (AMS) was a major European integrated defence electronics company and an equal shares joint venture between BAE Systems and Finmeccanica (now Leonardo S.p.A.)[1] until its dissolution on 3 May 2005.
AMS was formed in 1998 by the merger of GEC-Marconi Radar and Defence Systems and Alenia Difesa.
Equal shares in the resulting company were then held by Finmeccanica, and GEC-Marconi (later Marconi Electronic Systems (MES)), a division of The General Electric Company (GEC).
With the demerger and subsequent sale of its MES division in 1999, GEC's interest in AMS passed to BAE Systems.
On 28 January 2005 BAE Systems and Finmeccanica announced the intention to dissolve their partnership in the AMS joint venture with AMS' UK and Italian operations taken over by the respective partners as arranged through the Eurosystems Transaction.