Chiangmai (Thai Premier League): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-02 | Player | Ayutthaya United | Chiangmai | Free |
| 2026-08-02 | Tossaporn Chuchin | Lamphun Warrior | Chiangmai | Free |
| 2026-07-22 | Pattara Soimalai | Chiangmai | Kanchanaburi | Free |
| 2026-07-22 | Thanathorn Namchan | Bangkok | Chiangmai | Free |
| 2026-07-22 | Player | Chiangmai | Khonkaen United | Free |
| 2026-07-15 | Player | Chiangmai | TBC | Free |
| 2026-07-15 | Player | Chiangmai | TBC | Free |
| 2026-07-15 | Player | Chiangmai | TBC | Free |
| 2026-07-15 | Player | Chiangmai | TBC | Free |
| 2026-07-01 | Player | Chiangmai | TBC | Free |
| 2026-07-01 | Pattara Soimalai | Chiangmai | Kanchanaburi | Free |
| 2026-07-01 | Player | Chiangmai | Khonkaen United | Free |
| 2026-01-01 | Wittawin Clowuttiwat | Chiangmai | Bangkok | Free |
| 2025-08-13 | Player | Chiangmai | Kasetsart | Free |
| 2025-07-25 | Player | Chiangmai | Hougang United | Free |
| 2025-07-22 | Player | Chiangmai | Nakhon Si Thammarat | Free |
| 2025-07-18 | Player | Nakhon Si Thammarat | Chiangmai | Free |
| 2025-07-18 | Wittawin Clowuttiwat | Lamphun Warrior | Chiangmai | Free |
| 2025-07-16 | Pattara Soimalai | Singha Chiangrai United | Chiangmai | Free |
| 2025-07-15 | Player | Chiangmai | Mahasarakham United | Free |