YI U15 Wonsam: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-01-01 | Eo-jin Kim | YI U15 Wonsam | Yongin FC U18 | — |
| 2022-01-01 | Young-jun Cho | YI U15 Wonsam | Pohang St. U15 | — |
| 2022-01-01 | In-woo Back | YI U15 Wonsam | Yongin FC U18 | — |
| 2021-01-01 | Min-ha Shin | YI U15 Wonsam | Yongin FC U18 | — |
| 2020-01-01 | Eo-jin Kim | Yongin Star U12 | YI U15 Wonsam | — |
| 2019-01-01 | Seung-won Lee | YI U15 Wonsam | Shingal HS | — |
| 2019-01-01 | Seung-hyun Yu | YI U15 Wonsam | Shingal HS | — |
| 2019-01-01 | Seung-ho Park | YI U15 Wonsam | Shingal HS | — |
| 2019-01-01 | Joon-seob Im | YI U15 Wonsam | Jeju United U18 | — |
| 2019-01-01 | In-woo Back | SD FC U12 | YI U15 Wonsam | — |
| 2017-01-01 | Si-woo Jin | YI U15 Wonsam | Yangji FC U15 | — |
| 2016-01-01 | Seung-hyun Yu | Chelsea Siheung | YI U15 Wonsam | — |
| 2016-01-01 | Seung-ho Park | Yuljeon MS | YI U15 Wonsam | — |
| 2016-01-01 | Joon-seob Im | Suwon MB U15 | YI U15 Wonsam | — |
| 2015-01-01 | Si-woo Jin | Bluewings Acad. | YI U15 Wonsam | — |
| 2013-01-01 | Tae-wook Jeong | Wonsam MS | Jeju United U18 | — |