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...
13. Alex Oxlade-Chamberlain - 10/1
The Liverpool midfielder is 10/1 to join Newcastle this summer despite the Magpies not appearing to show any interest at this stage. Photo: Andrew Powell
14. Ollie Watkins - 10/1
The Aston Villa striker is a potential option for Newcastle this summer as they eye attacking reinforcements. Photo: Tony Marshall
15. Anthony Martial - 9/1
The Manchester United winger was linked with a move to Newcastle in January but joined Sevilla on loan instead. With his future seemingly away from Old Trafford, could Newcastle make a move? Photo: David Ramos
16. Dwight McNeil - 8/1
Burnley’s relegation has alerted clubs to Dwight McNeil’s potential availability this summer. Having already signed Chris Wood and Nick Pope, could Newcastle be tempted to sign another player from The Clarets? Photo: Jan Kruger