Dir | ||||||
|---|---|---|---|---|---|---|
 🏴Jamie Jones | 2/11/2026 | Transfer | Warrington Town | SouthamptonUntil 7/1/2026 | Goalkeeper | |
| 2/2/2026 | Transfer | Southampton | Hellas VeronaUntil 7/1/2026 | Defender | ||
 🏴Adam Armstrong | 2/2/2026 | Transfer | Southampton | Wolverhampton | Forward | |
 🏴Joseph Aribo | 2/2/2026 | Loan | Southampton | Leicester CityUntil 5/31/2026 | Midfielder | |
| 2/2/2026 | Loan | Southampton | Real ZaragozaUntil 6/30/2026 | Defender | ||
| 2/2/2026 | Loan | Mallorca | SouthamptonUntil 6/30/2026 | Forward | ||
| 2/1/2026 | Back from Loan | Hellas Verona | SouthamptonUntil 2/2/2026 | Defender | ||
 🏴Ryan Fraser | 1/23/2026 | Transfer | Southampton | Western Sydney WanderersUntil 7/1/2026 | Forward | |
 🏴James Bree | 1/18/2026 | Back from Loan | Charlton Athletic | Southampton | Defender | |
| 1/16/2026 | Back from Loan | Cultural Leonesa | SouthamptonUntil 2/2/2026 | Defender | ||
| 1/13/2026 | Loan | Southampton | Stoke CityUntil 5/31/2026 | Goalkeeper | ||
 🏴Ronnie Edwards | 1/9/2026 | Transfer | Southampton | Queens Park Rangers | Defender | |
| 1/8/2026 | Loan | Hamburger SV | SouthamptonUntil 6/30/2026 | Goalkeeper | ||
| 1/7/2026 | Loan | Southampton | Hamburger SVUntil 6/30/2026 | Forward | ||
| 1/1/2026 | Back from Loan | Red Star | Southampton | Defender | ||
| 11/6/2025 | Free Transfer | Unknown | SouthamptonUntil 7/13/2026 | Midfielder | ||
🏴James Bree | 9/1/2025 | Loan | Southampton | Charlton AthleticUntil 1/18/2026 | Defender | |
 🏴Will Smallbone | 9/1/2025 | Loan | Southampton | MillwallUntil 6/30/2026 | Midfielder | |
 🏴Charlie Taylor | 9/1/2025 | Loan | Southampton | West Bromwich AlbionUntil 6/30/2026 | Defender | |
| 9/1/2025 | Transfer | Heidenheim | Southampton | Forward | ||
 🏴Ben Brereton Díaz | 8/31/2025 | Loan | Southampton | Derby CountyUntil 5/31/2026 | Forward | |
| 8/31/2025 | Loan | Galatasaray | SouthamptonUntil 6/30/2026 | Defender | ||
| 8/29/2025 | Transfer | Southampton | West Ham UtdUntil 7/2/2026 | Midfielder | ||
🏴Finn Azaz | 8/29/2025 | Transfer | Middlesbrough | Southampton | Midfielder | |
| 8/29/2025 | Transfer | Nürnberg | Southampton | Midfielder | ||
 🏴Tom Fellows | 8/29/2025 | Transfer | West Bromwich Albion | Southampton | Midfielder | |
| 8/27/2025 | Loan | Southampton | Hellas VeronaUntil 2/1/2026 | Defender | ||
| 8/26/2025 | Loan | Southampton | Werder BremenUntil 6/30/2026 | Defender | ||
| 8/25/2025 | Loan | Southampton | Red StarUntil 1/1/2026 | Defender | ||
 🇧🇷Juan | 8/25/2025 | Transfer | Southampton | Göztepe | Forward | |
🏴George Long | 8/25/2025 | Loan | Norwich City | SouthamptonUntil 6/30/2026 | Goalkeeper | |
🇧🇷Juan | 8/24/2025 | Back from Loan | Göztepe | SouthamptonUntil 8/25/2025 | Forward | |
| 8/21/2025 | Transfer | Brentford | Southampton | Defender | ||
| 8/6/2025 | Transfer | Southampton | ValenciennesUntil 6/30/2026 | Forward | ||
 🏴Aaron Ramsdale | 8/2/2025 | Loan | Southampton | Newcastle UtdUntil 6/30/2026 | Goalkeeper | |
 🏴Joe Lumley | 8/1/2025 | Transfer | Southampton | Bristol CityUntil 10/21/2025 | Goalkeeper | |
| 7/28/2025 | Transfer | Southampton | Porto | Defender | ||
 🏴Kyle Walker-Peters | 7/20/2025 | Transfer | Southampton | West Ham Utd | Defender | |
| 7/9/2025 | Transfer | Köln | SouthamptonUntil 1/7/2026 | Forward | ||
| 7/4/2025 | Loan | Southampton | Cultural LeonesaUntil 1/16/2026 | Defender | ||
| 7/2/2025 | Transfer | Southampton | Atalanta | Forward | ||
 🏴Samuel Amo-Ameyaw | 7/1/2025 | Transfer | Southampton | Strasbourg | Forward | |
| 7/1/2025 | Transfer | Southampton | Trabzonspor | Forward | ||
 🏴Adam Lallana | 7/1/2025 | Retired | Southampton | Unknown | Midfielder | |
| 7/1/2025 | Transfer | Hoffenheim | Southampton | Defender | ||
| 6/30/2025 | Back from Loan | Southampton | ChelseaUntil 8/6/2025 | Midfielder | ||
| 6/30/2025 | Back from Loan | Southampton | RennesUntil 7/1/2025 | Midfielder | ||
| 6/30/2025 | Back from Loan | Göztepe | Southampton | Forward | ||
 🏴Samuel Edozie | 6/30/2025 | Back from Loan | Anderlecht | Southampton | Forward | |
🏴Ronnie Edwards | 6/30/2025 | Back from Loan | Queens Park Rangers | SouthamptonUntil 1/9/2026 | Defender | |
| 6/30/2025 | Back from Loan | Standard Liège | SouthamptonUntil 1/13/2026 | Goalkeeper | ||
🏴Samuel Amo-Ameyaw | 6/30/2025 | Back from Loan | Strasbourg | SouthamptonUntil 7/1/2025 | Forward |
