According to Tuttosport, Inter have refused to sell six players, turning down offers from Barcelona, Tottenham and Manchester City.
The club’s owners Suning are looking for new partners to support Inter financially.
The Zhang family could decide to sell a majority or a minority stake in the club, and a €250m bid from Fortress is the latest proposal they are considering.
That would allow them to keep a majority stake in the club, but no agreement has been reached yet.
According to Tuttosport, several top clubs in Europe are trying to tempt Inter with big-money offers for their stars.
However, the Serie A leaders are determined to keep hold of their best players, regardless of the economic crisis.
The Turin-based paper reports Inter rejected Barcelona’s offers for Lautaro Martinez, Nicolò Barella and Romelu Lukaku.
The Italian midfielder had also attracted interest from Bayern Munich, Atletico Madrid and Tottenham, with the Spurs who had tried to sign Milan Skriniar too.
Marcelo Brozovic received an offer from PSG while Manchester City attempted to sign Alessandro Bastoni, but Inter rejected the proposal and soon extended the defender’s contract.