Complex sentence: So the nine original outsiders could slowly leverage their 21 1/4 shares to overwhelm the Peruzzi's collective 36 3/4 shares-although lack of clear leadership when the leading partner died has been suggested as another factor in the failure of the Bardi and Peruzzi banks.
Split into simpler sentences: So the nine original outsiders could slowly leverage their 21 shares to overwhelm the Peruzzi's collective 36 shares. The lack of clear leadership, though, when the leading partner died has been suggested as another factor in the failure of the Bardi and Peruzzi banks.