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...
25. Conor Gallagher - 4/1
Conor Gallagher enjoyed an impressive season with Crystal Palace last time out. Despite no strong links at this stage, Newcastle are favourites to sign the midfielder. Photo: ADRIAN DENNIS
26. Armando Broja - 4/1
The Chelsea youngster is targeted by several Premier League clubs having spent last season on loan at Southampton. Newcastle are interested, but they face stiff competition. Photo: Steve Bardens
27. Ivan Toney - 3/1
Newcastle are the favourites to sign their former striker Ivan Toney from Brentford. Photo: Marc Atkins
28. Dominic Calvert-Lewin - 5/4
Newcastle are also favourites to sign Dominic Calvert-Lewin from Everton despite being quoted £60million for the England striker. Photo: Marc Atkins