Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 08.01.2021 | S. Haller | West Ham | Ajax | N/A |
| 08.01.2021 | R. Snodgrass | West Ham | — | N/A |
| 01.01.2021 | F. Alves | Silkeborg | West Ham | N/A |
| 01.01.2021 | W. Reid | — | West Ham | N/A |
| 16.10.2020 | S. Benrahma | Brentford | West Ham | Loan |
| 12.10.2020 | C. Dawson | — | West Ham | Loan |
| 06.10.2020 | Felipe Anderson | West Ham | FC Porto | Loan |
| 05.10.2020 | J. Cullen | West Ham | Anderlecht | € 500K |
| 05.10.2020 | Xande Silva | West Ham | Aris Thessalonikis | Loan |
| 02.10.2020 | V. Coufal | Slavia Praha | West Ham | € 5M |
| 04.09.2020 | G. Diangana | West Ham | — | N/A |
| 03.09.2020 | D. Kemp | West Ham | — | Loan |
| 28.08.2020 | Roberto Jiménez | West Ham | Valladolid | N/A |
| 24.08.2020 | J. Hugill | West Ham | — | N/A |
| 14.08.2020 | J. Ngakia | West Ham | — | Free |
| 13.08.2020 | A. Ajeti | West Ham | Celtic | N/A |
| 04.08.2020 | Roberto Jiménez | Alaves | West Ham | N/A |
| 01.08.2020 | J. Cullen | — | West Ham | N/A |
| 01.08.2020 | G. Diangana | — | West Ham | N/A |
| 01.08.2020 | J. Hugill | — | West Ham | N/A |
| 24.07.2020 | T. Souček | Slavia Praha | West Ham | € 16M |
| 01.07.2020 | C. Coventry | — | West Ham | N/A |
| 14.02.2020 | W. Reid | West Ham | — | Loan |
| 01.02.2020 | D. Kemp | West Ham | — | Loan |
| 31.01.2020 | J. Bowen | — | West Ham | € 20M |
| 29.01.2020 | T. Souček | Slavia Praha | West Ham | Loan |
| 20.01.2020 | Roberto Jiménez | West Ham | Alaves | Loan |
| 16.01.2020 | M. Samuelsen | West Ham | — | N/A |
| 15.01.2020 | D. Randolph | — | West Ham | € 4.9M |
| 14.01.2020 | J. Powell | West Ham | — | N/A |
| 10.01.2020 | C. Coventry | West Ham | — | Loan |
| 08.01.2020 | N. Holland | West Ham | — | Loan |
| 03.09.2019 | Kusu Moses Makasi | West Ham | — | Free |
| 02.09.2019 | J. Hernández | West Ham | Sevilla | € 7.8M |
| 08.08.2019 | G. Diangana | West Ham | — | Loan |
| 08.08.2019 | A. Ajeti | FC Basel 1893 | West Ham | N/A |
| 08.08.2019 | A. Carroll | West Ham | Newcastle | Free |
| 07.08.2019 | J. Cullen | West Ham | — | Loan |
| 06.08.2019 | Gonçalo Cardoso | Boavista | West Ham | € 3M |
| 05.08.2019 | Adrián | West Ham | Liverpool | Free |
| 02.08.2019 | R. Oxford | West Ham | FC Augsburg | N/A |
| 28.07.2019 | J. Hugill | West Ham | — | Loan |
| 26.07.2019 | M. Browne | West Ham | — | N/A |
| 24.07.2019 | Pedro Obiang | West Ham | Sassuolo | N/A |
| 17.07.2019 | S. Haller | Eintracht Frankfurt | West Ham | € 40M |
| 16.07.2019 | S. Byram | West Ham | — | € 830K |
| 08.07.2019 | M. Arnautović | West Ham | — | € 25M |
| 05.07.2019 | S. Nasri | West Ham | Anderlecht | Free |
| 01.07.2019 | S. Byram | Nottingham Forest | West Ham | N/A |
| 01.07.2019 | J. Cullen | — | West Ham | N/A |