Swansea U21: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-01-14 | Joel Cotterill | Swansea U21 | Dundee FC | Loan |
| 2025-09-01 | Joel Cotterill | Swansea U21 | Bristol Rovers | Loan |
| 2025-08-29 | Kyrell Wilson | Swansea U21 | Falkirk | Loan |
| 2025-07-01 | Filip Lissah | Swansea U21 | Swansea | — |
| 2025-01-24 | Kyrell Wilson | Swansea U21 | Yeovil Town | Loan |
| 2024-07-30 | Joel Cotterill | Swansea U21 | Swindon Town | Loan |
| 2023-09-01 | Kristian Fletcher | D.C. United | Swansea U21 | Loan |
| 2023-08-28 | Joel Cotterill | Swansea U21 | Stockport | Loan |
| 2023-07-01 | Kyrell Wilson | Swansea U18 | Swansea U21 | — |
| 2023-07-01 | Filip Lissah | Swansea U18 | Swansea U21 | — |
| 2022-08-01 | Nicolas Hansen | Swansea U21 | Atherton Collieries | Free |
| 2022-07-01 | Joel Cotterill | Swansea U18 | Swansea U21 | — |
| 2021-07-01 | Nicolas Hansen | Everton U23 | Swansea U23 | Free |
| 2021-07-01 | Ali Al-Hamadi | Swansea U23 | Without Club | — |
| 2020-07-01 | Ali Al-Hamadi | Swansea U18 | Swansea U23 | — |
| 2020-01-01 | Liam Cullen | Swansea U23 | Swansea | — |
| 2019-07-02 | Marco Dulca | Swansea U23 | FC Viitorul | Free |
| 2019-07-01 | Ben Cabango | Swansea U23 | Swansea | — |
| 2018-07-02 | Ben Cabango | Swansea U23 | The New Saints | Loan |
| 2018-07-01 | Steven Benda | Swansea U23 | Swansea | — |