The Primera Division leader has been linked with players such as Borussia Dortmund defender Mats Hummels and Santos forward Neymar in the past few months, but Bartomeu has stressed that they have not reached an agreement with the latter just yet.
"We'll make four or five signings in the summer. We need to shake up the squad. We've also got players from the B team," Barca's vice president told Catalunya Radio. "We haven't signed Neymar. He's a player we are interested in, we've said that before, and we'll see what happens when the season finishes."
Bartomeu also had his say on the future of Tito Vilanova and insisted that the 44-year-old will continue to be Barcelona's head coach, succinctly saying, "Tito will continue next year."
Vilanova replaced Pep Guardiola as Barca coach at the start of the 2012-13 campaign and guided the club to its best-ever start in La Liga.
The Camp Nou side currently sits atop of the league table, holding a 13-point lead over second-placed Real Madrid while closing in on a league title in the wake of its 4-0 loss to Bayern Munich in the first leg of their UEFA Champions League semifinal tie.