Meanwhile, Vinicius will expect to be a key man when Real aim to reach the Champions League last 16 by seeing off City.
The Real Madrid winger sealed the deal ahead of Wednesday's massive Champions League play-off with Manchester City.
Alverca confirmed: "(Previous owner) Ricardo Vicintin has sold his qualified stake in the public limited company to a group of investors.
The club, based near capital city Lisbon, are second in Liga Portugal 2 club.
It comes just a year after Alverca won Liga 3, having folded for 12 months in 2005 following financial problems.