The story
Founded by Fiat in 1919, in Sesto San Giovanni.1
Founded in 1919 as Fabbrica Italiana Magneti Marelli (FIMM), a joint-venture between Fiat and Ercole Marelli (1891–1993), an Italian electrical manufacturing company, the firm initially made ignition magnetos for the automotive and aviation industries, with its first plant in Sesto San Giovanni near Milan.
It was a subsidiary of FIAT (now Stellantis) from 1967 onwards.
On 22 October 2018, FCA announced that Magneti Marelli was being bought by KKR, to be merged with the Japanese automotive company Calsonic Kansei for $7.2 billion, a deal that would create one of the world's largest auto parts suppliers.
In May 2019, Magneti Marelli and Calsonic Kansei merged to form Marelli.
From Wikipedia’s article on Marelli Europe, shared under CC BY-SA 4.0.4