Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 02.07.2024 | M. Fuseini | Sturm Graz | Union St. Gilloise | N/A |
| 02.07.2024 | P. David | — | Union St. Gilloise | N/A |
| 01.07.2024 | V. Boone | Union St. Gilloise | — | Free |
| 01.07.2024 | V. Boone | — | Union St. Gilloise | N/A |
| 01.07.2024 | H. Lindner | Union St. Gilloise | FC Sion | N/A |
| 01.07.2024 | M. Traore | — | Union St. Gilloise | N/A |
| 26.06.2024 | N. Huygevelde | Union St. Gilloise | — | Loan |
| 17.06.2024 | A. Khalaili | — | Union St. Gilloise | N/A |
| 15.06.2024 | K. Van de Perre | — | Union St. Gilloise | Free |
| 15.06.2024 | V. Chambaere | Genk | Union St. Gilloise | Free |
| 17.01.2024 | M. Sorinola | Union St. Gilloise | — | Free |
| 16.01.2024 | H. Lindner | FC Sion | Union St. Gilloise | Loan |
| 09.01.2024 | A. Dony | Dender | Union St. Gilloise | N/A |
| 06.09.2023 | A. Dony | Union St. Gilloise | Dender | Loan |
| 05.09.2023 | V. Boone | Union St. Gilloise | — | Loan |
| 01.09.2023 | K. Rodríguez | — | Union St. Gilloise | N/A |
| 01.09.2023 | A. Castro-Montes | Gent | Union St. Gilloise | N/A |
| 31.08.2023 | M. Traore | Union St. Gilloise | — | Loan |
| 25.08.2023 | L. Pirard | Union St. Gilloise | — | N/A |
| 18.08.2023 | M. Amoura | FC Lugano | Union St. Gilloise | N/A |
| 14.08.2023 | Z. Antonio | Union St. Gilloise | — | Free |
| 10.08.2023 | B. Nieuwkoop | Union St. Gilloise | Feyenoord | N/A |
| 08.08.2023 | S. Lynen | Union St. Gilloise | Werder Bremen | € 2M |
| 27.07.2023 | N. Sadiki | Anderlecht | Union St. Gilloise | N/A |
| 22.07.2023 | V. Boniface | Union St. Gilloise | Bayer Leverkusen | € 20M |
| 20.07.2023 | O. El Azzouzi | Union St. Gilloise | Bologna | € 2M |
| 18.07.2023 | S. Van der Heyden | Union St. Gilloise | Mallorca | € 2.5M |
| 13.07.2023 | K. Mac Allister | — | Union St. Gilloise | N/A |
| 12.07.2023 | I. Kandouss | Union St. Gilloise | Gent | N/A |
| 07.07.2023 | T. Teuma | Union St. Gilloise | Reims | € 3.6M |
| 01.07.2023 | M. Rasmussen | Brann | Union St. Gilloise | N/A |
| 01.07.2023 | K. Machida | — | Union St. Gilloise | N/A |
| 01.07.2023 | Daryl Lopes Ribeiro | Union St. Gilloise | — | Free |
| 01.07.2023 | S. Adingra | Union St. Gilloise | Brighton | N/A |
| 01.07.2023 | José Rodríguez | Union St. Gilloise | — | Free |
| 01.07.2023 | M. Sorinola | — | Union St. Gilloise | N/A |
| 01.07.2023 | Y. Vertessen | Union St. Gilloise | PSV Eindhoven | N/A |
| 22.06.2023 | C. Vanhoutte | Cercle Brugge | Union St. Gilloise | N/A |
| 15.06.2023 | M. El Boukammiri | Union St. Gilloise | — | N/A |
| 15.06.2023 | H. Teklab | — | Union St. Gilloise | Free |
| 15.06.2023 | F. Leysen | PSV Eindhoven | Union St. Gilloise | Free |
| 03.02.2023 | D. Vanzeir | Union St. Gilloise | — | € 5M |
| 28.01.2023 | Y. Vertessen | PSV Eindhoven | Union St. Gilloise | Loan |
| 07.01.2023 | A. De Bolle | — | Union St. Gilloise | Free |
| 01.01.2023 | C. Terho | — | Union St. Gilloise | N/A |
| 25.11.2022 | I. Moutha-Sebtaoui | Union St. Gilloise | Beerschot VA | N/A |
| 08.10.2022 | I. Moutha-Sebtaoui | Charleroi | Union St. Gilloise | Free |
| 31.08.2022 | Pedro Lubamba | Union St. Gilloise | — | Free |
| 18.08.2022 | A. Hamzaoui | Union St. Gilloise | RAAL La Louvière | Free |
| 12.08.2022 | José Rodríguez | — | Union St. Gilloise | Free |