Stellantis shares were down 2.1% by 0720 GMT, the worst performers within Italy's blue-chip index (.FTMIB).
Jefferies analysts said in a note that while revenues were improving, the inventory situation was to be monitored.
CHIP FULFILMENTIn the first quarter, Stellantis' net revenue rose to 47.2 billion euros ($52 billion), topping analyst expectations of 45.5 billion euros in a Reuters poll, while consolidated shipments were up 7% to around 1.48 million units.
"A better fulfilment of semiconductor orders is slowly but surely improving our capacity to produce vehicles," Palmer said.
Sales of battery electric vehicles (BEV) rose 22% in the first quarter, Stellantis said, adding it would add nine new BEV models this year.