Sarpsborg 08 Fotballforening (Eliteserien): every transfer in and out, fees paid and earned, squad market value, €6m spent and €37m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Menno Koch | Sarpsborg 08 | Without Club | — |
| 2026-03-31 | Nikolai Skuseth | Sarpsborg 08 | Kristiansund BK | Loan |
| 2026-03-19 | Chriso | Qarabağ | Sarpsborg 08 | €300k |
| 2026-03-06 | Håvar Jenssen | Sarpsborg 08 | KFUM Oslo | Free |
| 2026-02-06 | Noa Williams | Kongsvinger | Sarpsborg 08 | €500k |
| 2026-02-01 | Camil Mmaee | MVV Maastricht | Sarpsborg 08 | — |
| 2026-01-30 | Sigurd Rosted | Toronto | Sarpsborg 08 | Free |
| 2026-01-30 | Claus Niyukuri | Haugesund | Sarpsborg 08 | €430k |
| 2026-01-01 | Mathias Svenningsen-Grønn | Sarpsborg 08 II | Sarpsborg 08 | — |
| 2025-09-02 | Momodou Lion Njie | KFUM Oslo | Sarpsborg 08 | Loan |
| 2025-09-02 | Anders Trondsen | IFK Göteborg | Sarpsborg 08 | Loan |
| 2025-08-29 | Nikolai Skuseth | Sarpsborg 08 | Aalesunds FK | Loan |
| 2025-08-21 | Bjørn Inge Utvik | Vancouver | Sarpsborg 08 | €250k |
| 2025-08-16 | Andreas Nibe | Mafra | Sarpsborg 08 | — |
| 2025-08-15 | Michael Opoku | Lyngby BK | Sarpsborg 08 | €1m |
| 2025-08-15 | Franklin Tebo Uchenna | Sarpsborg 08 | Red Star | €2.7m |
| 2025-08-13 | Sondre Ørjasæter | Sarpsborg 08 | FC Twente | €5m |
| 2025-08-08 | Sondre Sørli | Bodø/Glimt | Sarpsborg 08 | €420k |
| 2025-08-05 | Bop Guèye | Oslo FA Dakar | Sarpsborg 08 | — |
| 2025-08-01 | Carljohan Eriksson | Sarpsborg 08 | Sandefjord | Loan |