Fiat Chrysler Automobiles N.V. /zigman2/quotes/204248628/composite FCAU -1.44% said Friday it was in the process of converting its first plant to making face masks to donate to first responders and health chare workers. The automaker said the first machinery to make the masks were installed with supply expected "in the coming weeks." Fellow auto makers Ford Motor Co. /zigman2/quotes/208911460/composite F -1.52% and General Motors Co. /zigman2/quotes/205226835/composite GM +0.41% have also announced measures to make personal protective equipment. Fiat Chrysler's stock slumped 5.8% in premarket trading after running up 21.7% over the past three sessions. Over the past three months, the stock has shed 48.0% through Thursday, while the S&P 500 /zigman2/quotes/210599714/realtime SPX -0.15% has lost 18.8%.