The Stellantis group -- which includes the Fiat, Jeep, Lancia, Chrysler, Alfa Romeo, Peugeot, Opel, Citroen/Ds. brands, among others -- saw growth of 3.5 percent with a market share of 32.9 percent from 34.05 percent in April, based on Reuters calculations.

(Sara Rossi, editing Sabina Suzzi)