Eddie Howe has secured the signings of Matt Targett, Nick Pope and Sven Botman for a combined total of roughly £60million.
And with just under two months to go before the window slams shut, United still have plenty of time to secure further signings.
But who are the players deemed the most likely to join Newcastle before September? A total of 28 players who played in the Premier League during the 2021-22 campaign have had Newcastle listed by Sky Bet as their potential next destination this summer.
Here they are ranked in order of least to most likely...
5. Jordan Pickford - 20/1
Was linked with a spectacular move to Newcastle earlier in the window but the signing of Nick Pope has ruled out any possibility of that happening. Photo: Alex Livesey
6. Riyad Mahrez - 20/1
The Manchester City winger is unlikely to leave the club this summer but he has been priced at 20/1 to join Newcastle by September 3. Photo: Gonzalo Arroyo Moreno
7. Harry Winks - 18/1
Winks has been linked with a move away from Tottenham Hotspur this summer but Newcastle are considered outsiders at this stage with no interest reported. Photo: Justin Setterfield
8. Marcus Rashford - 16/1
A potential Manchester United exit has been rumoured for Rashford but it is unlikely we will see him at Newcastle this summer. Photo: Ash Donelon