Karlsruher SC: every transfer in and out, fees paid and earned, squad market value, €2.9m spent and €24m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-11 | Sandro Trémoulet | FK Radnik Surdulica | Karlsruher SC | €250k |
| 2026-08-11 | Andreas Müller | Karlsruher SC | Fortuna Düsseldorf | Loan |
| 2026-07-30 | Meiko Wäschenbach | Karlsruher SC | Alemannia Aachen | Free |
| 2026-07-28 | Philipp Förster | Karlsruher SC | Fortuna Düsseldorf | Free |
| 2026-07-23 | Mateo Kritzer | Karlsruher SC | Eintracht Trier | Loan |
| 2026-07-22 | Santeri Väänänen | Rosenborg Ballklub | Karlsruher SC | €100k |
| 2026-07-16 | Noah Rupp | Karlsruher SC | FC Wil 1900 | Free |
| 2026-07-11 | Viktor Bergh | Djurgården | Karlsruher SC | Free |
| 2026-07-08 | Efe-Kaan Sihlaroglu | Karlsruher SC | Igdir FK | Free |
| 2026-07-04 | Deniz Ofli | Bayern Munich | Karlsruher SC | Loan |
| 2026-07-02 | Moritz Broschinski | FC Basel 1893 | Karlsruher SC | Loan |
| 2026-07-01 | Paul Scholl | Bayern Munich | Karlsruher SC | €150k |
| 2026-07-01 | Kevin Wiethaup | VfL Osnabrück | Karlsruher SC | Free |
| 2026-07-01 | Noel Eichinger | Jahn Regensburg | Karlsruher SC | Free |
| 2026-07-01 | Ferdinand Gebert | Astoria Walldorf | Karlsruher SC | Free |
| 2026-07-01 | Tim Civeja | Saarbrücken | Karlsruher SC | Free |
| 2026-07-01 | Shio Fukuda | Borussia Mönchengladbach | Karlsruher SC | €700k |
| 2026-07-01 | David Herold | Karlsruher SC | Borussia Mönchengladbach | €3.5m |
| 2026-07-01 | Aki Koch | Karlsruher SC | Zelvia | Free |
| 2026-07-01 | Nicolai Rapp | Karlsruher SC | Dynamo Dresden | Free |