George Dobson, Jordan Willis, Laurens De Bock and Marc McNulty are just some of the names Jack Ross has signed to try and bolster his squad as the Black Cats target promotion back to the Championship at the second attempt.
Here, we round-up the figures – including incoming and outgoing players - who have won and lost as a result of the Black Cats’ transfer business. Scroll down and click through the pages to see our Sunderland AFC summer window winners and losers.
9. Jack Diamond - winner
Good window. Sunderland have confirmed Jack Diamond has joined Vanarama National League side Harrogate Town on a youth loan. The 19-year-old, who made his first-team debut for Sunderland last season in a 3-1 win against Carlisle United in the EFL Trophy, has signed for the Wetherby Road club until January 2020. Photo: FRANK REID
10. Stewart Donald - winner
Sunderland's chairman has taken further steps towards making the club sustainable, managing to reach agreements and find deals for big earners. Photo: Pete Norton