Following is a list in alphabetical order of some of Italy's main companies will be doing, including those that announced changes before the shutdown:

BREMBO

The premium brakes maker had already suspended production at its four Italian plants until March 29.

CNH INDUSTRIAL

The Italian-American vehicle maker is suspending most European assembly due to supply chain constraints.

DE LONGHI

The home appliances maker halted production in Italy while warehousing and shipping will stop by March 25. Its Chinese and Romanian plants, as well as international logistics and distribution, are operating as usual.

ENI

The energy company is continuing refining, oil and gas production and power generation, classified as strategic, while asking white collar staff to work remotely. Its chemicals unit Versalis, whose products include plastics used in hospitals, is also a key industry and remains open.

FERRARI

The luxury carmaker had already closed its two plants until March 27 in response to parts shortages.

FIAT CHRYSLER

The Italian-American automaker is suspending production at all its European and North American plants and will help with the production of protective medical masks.

IMA

The maker of automated machinery for the pharmaceuticals, cosmetics and food industries will continue to operate to help keep supply chains running.

LEONARDO

The aerospace and defence group is keeping plants operating, while boosting health and safety measures.

LUXOTTICA

The maker of Ray Ban sunglasses has suspended all Italian activities.

PIRELLI

The tyre maker is suspending production at Italian factories.

SOGEFI

The automative parts supplier is suspending production activities in Italy, France and Spain. Limited production will continue in certain sites to fill aftermarket needs.

TOD'S

The luxury leather goods maker has stopped all activities.

(Reporting by Gianluca Semeraro, Stephen Jewkes and Valentina Za; Editing by David Clarke)