Simplify the following text for a Grade 10 native English-speaking person.
Original: 20 % of the shares are held through the state Treasury and 10 % are held through the Cassa depositi e prestiti ( a bank mostly owned by the Ministry of Economy and Finance of Italy ) .
Simplified: The Italian Government owns a 30 % golden share in the company , 20 % held through the state Treasury and 10 % held through the Cassa depositi e prestiti .