Seongnam FC U15: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2021-01-01 | Seung-bin Jung | Seongnam FC U15 | FC Dongtan U15 | — |
| 2021-01-01 | Neung Kwon | Seongnam FC U15 | Boin HS | — |
| 2020-01-01 | Ji-soo Kim | Seongnam FC U15 | Seongnam FC U18 | — |
| 2019-01-01 | Seung-bin Jung | Seongnam Yth. | Seongnam FC U15 | — |
| 2018-01-01 | Neung Kwon | I. Bupyeong ES | Seongnam FC U15 | — |
| 2017-01-01 | Ji-soo Kim | Donggok ES | Seongnam FC U15 | — |
| 2015-01-01 | Tae-joon Park | Seongnam FC U15 | Seongnam FC U18 | — |
| 2014-01-01 | Min-kyu Kim | Seongnam FC U15 | Seongnam FC U18 | — |
| 2011-01-01 | Tae-joon Park | Eojeong ES | Seongnam FC U15 | — |
| 2011-01-01 | Min-kyu Kim | S. Jungang ES | Seongnam FC U15 | — |