Società Sportiva Lazio S.p.A. (Serie A): every transfer in and out, fees paid and earned, squad market value, €416m spent and €361m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Toma Bašić | Lazio | Venezia | Free |
| 2026-07-01 | Pedro | Lazio | Without Club | — |
| 2026-07-01 | Elseid Hysaj | Lazio | Without Club | — |
| 2026-07-01 | Boulaye Dia | Salernitana | Lazio | €11m |
| 2026-07-01 | Alfonso Pedraza | Villarreal | Lazio | Free |
| 2026-06-30 | Leonardo Di Tommaso | Cerignola | Lazio | Free |
| 2026-06-30 | Alessandro Milani | Avellino | Lazio | Free |
| 2026-03-02 | Marcos Antônio | Lazio | São Paulo | €4.2m |
| 2026-02-02 | Matías Vecino | Lazio | Celta de Vigo | Free |
| 2026-01-31 | Adrian Przyborek | Pogon Szczecin | Lazio | €4.5m |
| 2026-01-27 | Edoardo Motta | Reggiana | Lazio | €1.2m |
| 2026-01-27 | Daniel Maldini | Atalanta | Lazio | Loan |
| 2026-01-27 | Christos Mandas | Lazio | Bournemouth | Loan |
| 2026-01-17 | Dimitrije Kamenovic | Lazio | NK Lokomotiva | Free |
| 2026-01-09 | Kenneth Taylor | Ajax | Lazio | €17m |
| 2026-01-08 | Petar Ratkov | Salzburg | Lazio | €13m |
| 2026-01-08 | Mattéo Guendouzi | Lazio | Fenerbahçe | €28m |
| 2026-01-05 | Taty Castellanos | Lazio | West Ham | €29m |
| 2026-01-04 | Diego González | Lazio | Atlas | €1.2m |
| 2025-08-21 | Gaetano Castrovilli | Lazio | Bari | Free |