Middlesbrough FC (Premier League): every transfer in and out, fees paid and earned, squad market value, €133m spent and €154m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Sam Silvera | Middlesbrough | Without Club | — |
| 2026-07-01 | Dan Barlaser | Middlesbrough | Without Club | — |
| 2026-01-27 | Jeremy Sarmiento | Brighton | Middlesbrough | Loan |
| 2026-01-26 | Lukas Engel | Middlesbrough | Salt Lake | €830k |
| 2025-09-02 | Dan Barlaser | Middlesbrough | Hibernian FC | Loan |
| 2025-09-01 | Tom Glover | Middlesbrough | Without Club | — |
| 2025-09-01 | David Strelec | Slo. Bratislava | Middlesbrough | €7.5m |
| 2025-08-29 | Finn Azaz | Middlesbrough | Southampton | €14m |
| 2025-08-27 | Matt Targett | Newcastle | Middlesbrough | Loan |
| 2025-08-19 | Sverre Nypan | Man City | Middlesbrough | Loan |
| 2025-08-13 | Rav van den Berg | Middlesbrough | 1.FC Köln | €8m |
| 2025-07-25 | Anfernee Dijksteel | Middlesbrough | Kocaelispor | Free |
| 2025-07-25 | Alfie Jones | Hull City | Middlesbrough | €4.2m |
| 2025-02-11 | Lukas Engel | Middlesbrough | Cincinnati | Loan |
| 2025-02-04 | Emmanuel Latte Lath | Middlesbrough | Atlanta | €21m |
| 2025-02-03 | Samuel Iling-Junior | Aston Villa | Middlesbrough | Loan |
| 2025-02-03 | Kelechi Iheanacho | Sevilla FC | Middlesbrough | Loan |
| 2025-01-31 | Matthew Hoppe | Middlesbrough | Sönderjyske | Free |
| 2025-01-29 | Mark Travers | Bournemouth | Middlesbrough | Loan |
| 2025-01-25 | George Edmundson | Ipswich | Middlesbrough | €710k |