The Bundesliga transfer window hasn't officially opened yet, but deals are still being done ahead of July.
There was a major move for Naldo, as he swapped VfL Wolfsburg for Schalke 04 on a two-year deal.
Wolfsburg made a signing of their own and brought in highly sought-after attacker Josip Brekalo.
Another forward was also in the headlines after Bobby Wood made his anticipated switch to Hamburger SV.
Naldo heads for Gelsenkirchen
Christian Heidel has been installed as Schalke's sporting director for a matter of days but has already made a massive signing.
Naldo has swapped Lower Saxony for the Ruhr and will be a welcome addition to the Royal Blues' defence after the news that Joel Matip would be heading to Liverpool.
The 33-year-old brings a massive amount of experience to the Veltins-Arena, both in the Bundesliga and in Europe.
He said, "When Christian Heidel spoke to me it was clear that this would be a new and exciting challenge."
Brekalo bolsters Wolves' attack
A youngster who has been attracting attention from some of Europe's elite, Wolfsburg will be over the moon to tie down Brekalo.
The winger has penned a five-year deal at the Volkswagen Arena following his move from Dinamo Zagreb, with the Wolves reportedly paying over £5m for his services.
Brekalo commented, "It's always been my dream to play in the Bundesliga. Wolfsburg are a club with great prospects, where I can continue to develop at the highest level."
Can Wood cut it in the Bundesliga?
US international and 1. FC Union Berlin hitman, Bobby Wood, has been snapped up by HSV in a deal believed to be worth around £3m.
He has signed a deal through to 2020 and will be looking forward to taking his 17-goal season into the Bundesliga come August.
"We're very pleased to have sealed this transfer so early and are looking forward to welcoming a young player with huge potential for development," said Beiersdorfer.