Southampton FC (Premier League): every transfer in and out, fees paid and earned, squad market value, €794m spent and €818m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Daniel Peretz | Bayern Munich | Southampton | €8m |
| 2026-02-02 | Juan Larios | Southampton | Real Zaragoza | Loan |
| 2026-02-02 | Joe Aribo | Southampton | Leicester | Loan |
| 2026-02-02 | Cyle Larin | RCD Mallorca | Southampton | Loan |
| 2026-02-02 | Armel Bella-Kotchap | Southampton | Hellas Verona | €5m |
| 2026-02-02 | Adam Armstrong | Southampton | Wolves | €8.1m |
| 2026-01-23 | Ryan Fraser | Southampton | Western Sydney | Free |
| 2026-01-13 | Gavin Bazunu | Southampton | Stoke City | Loan |
| 2026-01-09 | Ronnie Edwards | Southampton | QPR | €5.2m |
| 2026-01-08 | Daniel Peretz | Bayern Munich | Southampton | Loan |
| 2026-01-07 | Damion Downs | Southampton | Hamburg | Loan |
| 2025-11-06 | Oriol Romeu | Without Club | Southampton | — |
| 2025-09-01 | Will Smallbone | Southampton | Millwall | Loan |
| 2025-09-01 | Léo Scienza | Heidenheim | Southampton | €9m |
| 2025-09-01 | James Bree | Southampton | Charlton | Loan |
| 2025-09-01 | Charlie Taylor | Southampton | West Brom | Loan |
| 2025-08-31 | Ben Brereton Díaz | Southampton | Derby | Loan |
| 2025-08-29 | Mateus Fernandes | Southampton | West Ham | €44m |
| 2025-08-29 | Finn Azaz | Middlesbrough | Southampton | €14m |
| 2025-08-27 | Armel Bella-Kotchap | Southampton | Hellas Verona | Loan |