AZ Alkmaar (Eredivisie): every transfer in and out, fees paid and earned, squad market value, €100m spent and €342m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Daniël Deen | AZ Alkmaar | Without Club | — |
| 2026-02-01 | Mayckel Lahdo | AZ Alkmaar | Bröndby IF | Loan |
| 2026-01-31 | Rion Ichihara | RB Omiya | AZ Alkmaar | — |
| 2026-01-12 | Kasper Boogaard | AZ Alkmaar U21 | AZ Alkmaar | — |
| 2026-01-11 | Dave Kwakman | AZ Alkmaar | FC Volendam | Loan |
| 2026-01-08 | Lequincio Zeefuik | AZ Alkmaar | Heracles Almelo | Loan |
| 2026-01-02 | Jizz Hornkamp | Heracles Almelo | AZ Alkmaar | €4.5m |
| 2026-01-01 | Ayoub Oufkir | Sparta R. | AZ Alkmaar | €5m |
| 2025-09-06 | Myron van Brederode | AZ Alkmaar | KV Mechelen | — |
| 2025-09-01 | Zico Buurmeester | AZ Alkmaar | PEC Zwolle | Loan |
| 2025-08-29 | Matej Sin | Banik Ostrava | AZ Alkmaar | €4m |
| 2025-08-28 | Weslley Patati | M. Tel Aviv | AZ Alkmaar | €7.3m |
| 2025-08-13 | Mayckel Lahdo | AZ Alkmaar | FC Nantes | Loan |
| 2025-08-12 | Ernest Poku | AZ Alkmaar | Leverkusen | €10m |
| 2025-08-04 | Billy van Duijl | AZ Alkmaar U21 | AZ Alkmaar | — |
| 2025-08-02 | David Møller Wolfe | AZ Alkmaar | Wolves | €12m |
| 2025-07-15 | Isak Jensen | Viborg FF | AZ Alkmaar | €4m |
| 2025-07-15 | Bruno Martins Indi | AZ Alkmaar | Sparta R. | Free |
| 2025-07-11 | Ruben van Bommel | AZ Alkmaar | PSV | €16m |
| 2025-07-04 | Jayden Addai | AZ Alkmaar | Como | €14m |