K. Demirbay transfers
| Date | Type | From | To |
|---|---|---|---|
| 2026-01-14 | Free agent | Eyüpspor | Kasımpaşa |
| 2026-01-12 | Free agent | Eyüpspor | Kasımpaşa |
| 2025-07-02 | Transfer | Galatasaray | Eyüpspor |
| 2023-08-03 | € 3.7M | Bayer Leverkusen | Galatasaray |
| 2019-07-01 | € 32M | 1899 Hoffenheim | Bayer Leverkusen |
| 2016-07-13 | € 1.7M | Hamburger SV | 1899 Hoffenheim |
| 2016-06-01 | N/A | Fortuna Düsseldorf | Hamburger SV |
| 2015-08-25 | Loan | Hamburger SV | Fortuna Düsseldorf |
| 2015-06-01 | N/A | 1. FC Kaiserslautern | Hamburger SV |
| 2014-09-01 | Loan | Hamburger SV | 1. FC Kaiserslautern |
| 2013-07-01 | Free | Borussia Dortmund | Hamburger SV |