Who is Rocco Basilico and why the Ray-Ban heir has rejected a $3.9 billion buyout offer for stake in family firm Delfin?

Summary
A family dispute at Delfin has escalated after Rocco Basilico turned down a $3.9 billion buyout offer from Leonardo Maria del Vecchio for his 12.5% stake. Basilico reportedly wants $4.8 billion, while three shareholders are seeking to ease rules governing board changes.
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Who is Rocco Basilico and why the Ray-Ban heir has rejected a $3.9 billion buyout offer for stake in family firm Delfin?
A family dispute at Delfin has escalated after Rocco Basilico turned down a $3.9 billion buyout offer from Leonardo Maria del Vecchio for his 12.5% stake. Basilico reportedly wants $4.8 billion, while three shareholders are seeking to ease rules governing board changes.