Millwall: every transfer in and out, fees paid and earned, squad market value, €33m spent and €31m earned. Tracked squad: ACTUAL Value €23m, in line with the market. Valued as of 2026-08-26.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-21 | Jordi Osei-Tutu | Bolton | Millwall | Free |
| 2026-08-06 | Lyndon Dykes | Charlton | Millwall | Free |
| 2026-08-02 | Danny Batth | Derby | Millwall | Free |
| 2026-08-01 | Kamarl Grant | Millwall | Bromley | Loan |
| 2026-07-23 | Danny McNamara | Millwall | Charlton | Free |
| 2026-07-19 | Billy Mitchell | Millwall | Sheffield Wednesday | Free |
| 2026-07-15 | Elkan Baggott | Ipswich Town | Millwall | Free |
| 2026-07-14 | Adam Mayor | Millwall | Hibernian FC | Free |
| 2026-07-09 | Mark Sykes | Bristol City | Millwall | Free |
| 2026-07-09 | Barry Bannan | Millwall | Sheffield Wednesday | Free |
| 2026-07-06 | Mathis Servais | KV Mechelen | Millwall | €4m |
| 2026-07-03 | Macaulay Langstaff | Millwall | Salford City | Free |
| 2026-07-01 | Taïryk Arconte | Rodez AF | Millwall | €3m |
| 2026-07-01 | Jenson Metcalfe | Bradford | Millwall | Free |
| 2026-07-01 | Wes Harding | Millwall | Plymouth | Free |
| 2026-02-02 | Wes Harding | Millwall | Plymouth | Loan |
| 2026-02-02 | Aidomo Emakhu | Millwall | Oxford United | Free |
| 2026-02-01 | Tom Watson | Brighton | Millwall | Loan |
| 2026-02-01 | Anthony Patterson | Sunderland AFC | Millwall | Loan |
| 2026-01-28 | Barry Bannan | Sheffield Wednesday | Millwall | Free |