FC Groningen (Eredivisie): every transfer in and out, fees paid and earned, squad market value, €22m spent and €90m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Travis Hernes | Newcastle U21 | FC Groningen | — |
| 2026-07-01 | Thijs Oosting | FC Groningen | PEC Zwolle | €750k |
| 2026-07-01 | Mats Seuntjens | FC Groningen | Without Club | — |
| 2026-07-01 | Hidde Jurjus | FC Groningen | Without Club | — |
| 2026-07-01 | Dirk Baron | FC Groningen | FC Emmen | Free |
| 2026-05-01 | Ryan Metu | Groningen U19 | FC Groningen | — |
| 2026-02-03 | Noam Emeran | FC Groningen | FC Emmen | Loan |
| 2026-01-29 | Kristian Strømland Lien | FC Groningen | Djurgården | €700k |
| 2025-09-02 | Travis Hernes | Newcastle U21 | FC Groningen | Loan |
| 2025-09-02 | Fofin Turay | FC Groningen | TOP Oss | Loan |
| 2025-08-28 | Tygo Land | PSV | FC Groningen | Loan |
| 2025-08-19 | Dies Janse | Ajax U21 | FC Groningen | Loan |
| 2025-08-15 | Lovro Stubljar | FC Empoli | FC Groningen | — |
| 2025-08-06 | Maxim Mariani | FC Groningen | TOP Oss | Free |
| 2025-07-31 | Kevin van Veen | FC Groningen | FC Eindhoven | Free |
| 2025-07-17 | Tyrique Mercera | SC Cambuur | FC Groningen | €663k |
| 2025-07-17 | Thijs Oosting | FC Groningen | PEC Zwolle | Loan |
| 2025-07-11 | Oskar Zawada | RKC Waalwijk | FC Groningen | €750k |
| 2025-07-07 | Younes Taha | FC Twente | FC Groningen | Loan |
| 2025-07-02 | Luciano Valente | FC Groningen | Feyenoord | €6.8m |