Fiat Heir Elkann’s Mother Seeks to Join in Tax Case Against Son

Stellantis NV Chairman John Elkann is facing a new legal claim from his mother, Margherita Agnelli, who moved to join a criminal tax case against the Fiat heir as a civil party.

Margherita Agnelli, 70, is seeking damages for alleged moral and reputational harm over what her lawyers described as a fraudulent scheme tied to her parents’ succession and the ownership of the family holding company Dicembre, according to a statement.

The filing in a Turin court would add a layer to a criminal proceeding that’s entangled the head of one of Europe’s most prominent industrial dynasties. Elkann ...