EnglandDir | ||||||
|---|---|---|---|---|---|---|
| 2/1/2024 | Transfer | West Ham Utd | Real Betis | Midfielder | ||
| 2/1/2024 | Loan | West Ham Utd | Olympique LyonnaisUntil 6/30/2024 | Forward | ||
| 1/26/2024 | Loan | West Ham Utd | West Bromwich AlbionUntil 5/31/2024 | Forward | ||
 🏴Kalvin Phillips | 1/26/2024 | Loan | Manchester City | West Ham UtdUntil 6/30/2024 | Midfielder | |
 🏴Conor Coventry | 1/12/2024 | Transfer | West Ham Utd | Charlton Athletic | Midfielder | |
| 1/5/2024 | Loan | West Ham Utd | MonacoUntil 6/30/2024 | Defender | ||
 🏴Andy Irving | 9/1/2023 | Loan | West Ham Utd | Austria KlagenfurtUntil 6/30/2024 | Midfielder | |
 🏴Archie Woods | 9/1/2023 | Loan | West Ham Utd | DartfordUntil 5/31/2024 | Midfielder | |
🏴Andy Irving | 8/30/2023 | Transfer | Austria Klagenfurt | West Ham UtdUntil 9/1/2023 | Midfielder | |
| 8/27/2023 | Transfer | Ajax | West Ham UtdUntil 7/10/2025 | Midfielder | ||
| 8/22/2023 | Transfer | Stuttgart | West Ham Utd | Defender | ||
 🏴Flynn Downes | 8/21/2023 | Loan | West Ham Utd | SouthamptonUntil 5/31/2024 | Midfielder | |
 🏴James Ward-Prowse | 8/14/2023 | Transfer | Southampton | West Ham UtdUntil 8/30/2024 | Midfielder | |
| 8/10/2023 | Transfer | Ajax | West Ham Utd | Midfielder | ||
| 8/8/2023 | Transfer | West Ham Utd | Torino | Midfielder | ||
| 8/7/2023 | Transfer | West Ham Utd | Atalanta | Forward | ||
| 8/2/2023 | Transfer | West Ham Utd | River Plate | Midfielder | ||
 🏴Declan Rice | 7/15/2023 | Transfer | West Ham Utd | Arsenal | Midfielder | |
| 7/1/2023 | Transfer | West Ham Utd | BeşiktaşUntil 7/1/2025 | Defender | ||
| 7/1/2023 | Transfer | West Ham Utd U18 | West Ham UtdUntil 1/26/2024 | Forward | ||
 🏴Divin Mubama | 7/1/2023 | Transfer | West Ham Utd U21 | West Ham UtdUntil 8/29/2024 | Forward | |
| 6/30/2023 | Back from Loan | Beşiktaş | West Ham UtdUntil 7/1/2023 | Defender | ||
| 6/30/2023 | Back from Loan | Torino | West Ham UtdUntil 8/8/2023 | Midfielder |
