Ed Woodward has told Manchester United fans to expect more signings this summer as new boss Louis van Gaal aims to bolster his squad ahead of the new season.
Luke Shaw and Ander Herrera both have already arrived at Old Trafford for a combined fee of 71 million euro, while Juventus star Arturo Vidal and Everton midfielder James McCarthy are also targets.
And Woodward - who drew criticism for United's pursuit of key transfer targets last summer - is confident he will have more new faces to present to the fans in the coming weeks.
"We’ve been working with Louis over several weeks with regards to targets and we’re continuing to move forward on some of those targets," Woodward told MUTV.
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"We are still a huge attraction to top football stars around the world – there is no doubt about that. I hope [fans] will see the direction we’re heading in with the new manager, coaching staff and players, and a commitment to do what it takes to get back to the top.
"We are willing to invest. There is no fixed budget. Financially we are extremely strong and funds are available. Louis is assessing what’s going on and there is a lot of work going on behind the scenes, so watch this space."
When asked if players would be leaving Old Trafford to make way for new arrivals, Woodward added: "Yes, I think so. The manager makes that decision. A few players have already gone and there may well be a few others.
"It’s also worth commenting that we’re not in Europe this year, so there are fewer games and Louis may take the view that he wants a tighter squad to bed in.
"If you do the analysis over the last year, Liverpool performed extremely well with a smaller number of players, but that’s a decision for the manager."
Woodward also reiterated that a top-four finish is the minimum requirement for United this season after a disastrous campaign under David Moyes last term.
"We’re a club that absolutely should be in the Champions League," he continued. "That’s what our fans want, that’s what our players want and that’s what every member of staff wants.
"We have to strive to win. We’re not here to be an also-ran; we’re here to win trophies to add to that huge, incredible list that we’ve won over many years."