Union Saint-Gilloise (Jupiler Pro League): every transfer in and out, fees paid and earned, and the market value of the squad. €87m spent, €189m earned. Tracked squad: ACTUAL Value €97m, in line with the market. Valued as of 2026-09-08.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-09-03 | Ousseynou Niang | Union Saint-Gilloise | Zulte Waregem | Free |
| 2026-09-03 | Marc Giger | Union Saint-Gilloise | ETO FC | Loan |
| 2026-09-02 | Dylan Aquino | Club Atlético Lanús | Union Saint-Gilloise | €7m |
| 2026-09-02 | Dennis Egel | Astoria Walldorf | Union Saint-Gilloise | Free |
| 2026-09-01 | Mohammed Fuseini | Union Saint-Gilloise | Derby | Loan |
| 2026-08-29 | Denzel De Roeve | Sportsklubben Brann | Union Saint-Gilloise | Free |
| 2026-08-21 | Fedde Leysen | Union Saint-Gilloise | US Sassuolo | Loan |
| 2026-08-18 | Promise David | Union Saint-Gilloise | Brighton & Hove Albion | Loan |
| 2026-08-15 | Anan Khalaili | Union Saint-Gilloise | Crystal Palace | €25m |
| 2026-08-01 | Hervé Koffi | RC Lens | Union Saint-Gilloise | Loan |
| 2026-08-01 | Mamadou Thierno Barry | Union Saint-Gilloise | Al-Shabab Club | Loan |
| 2026-07-28 | Kjell Scherpen | Union Saint-Gilloise | Ipswich Town | €10m |
| 2026-07-02 | Relebohile Mofokeng | Orlando Pirates | Union Saint-Gilloise | €3.5m |
| 2026-07-01 | Nikki Havenaar | SV Ried | Union SG | €400k |
| 2026-07-01 | Ondrej Kricfalusi | Banik Ostrava | Union SG | €5m |
| 2026-07-01 | Nikki Havenaar | SV Ried | Union Saint-Gilloise | €400k |
| 2026-07-01 | Nohim Chibani | Quevilly Rouen | Union Saint-Gilloise | Free |
| 2026-07-01 | Ilan Hurtevent | KV Kortrijk | Union Saint-Gilloise | Free |
| 2026-07-01 | Darius Olaru | FCSB | Union Saint-Gilloise | €3m |
| 2026-07-01 | Christian Burgess | Union Saint-Gilloise | KAA Gent | Free |