St. Louis City Soccer Club (Major League Soccer): every transfer in and out, fees paid and earned, squad market value, €16m spent and €6.6m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Cedric Teuchert | St. Louis CITY | Without Club | — |
| 2026-06-05 | Joshua Yaro | St. Louis CITY | AC Boise | Loan |
| 2026-02-24 | Sergio Córdova | Young Boys | St. Louis CITY | Loan |
| 2026-02-10 | Lukas MacNaughton | D.C. United | St. Louis CITY | Free |
| 2026-02-03 | Jayden Reid | St. Louis CITY | Kansas City | Free |
| 2026-01-30 | Dante Polvara | Aberdeen FC | St. Louis CITY | €200k |
| 2026-01-29 | Rasmus Alm | St. Louis CITY | Örgryte | Free |
| 2026-01-29 | Mamadou Mbacke | Barça Atlètic | St. Louis CITY | Free |
| 2026-01-29 | Henry Kessler | St. Louis CITY | Charlotte | Free |
| 2026-01-27 | Rafael Santos | Colorado | St. Louis CITY | Free |
| 2026-01-27 | João Klauss | St. Louis CITY | LA Galaxy | €2m |
| 2026-01-26 | Conrad Wallem | Slavia Praha | St. Louis CITY | €2m |
| 2026-01-13 | Daniel Edelman | New York | St. Louis CITY | €600k |
| 2026-01-09 | Selmir Pidro | St. Louis City Soccer Club | Velez | Free |
| 2025-09-12 | Jake Girdwood-Reich | St. Louis CITY | Auckland FC | Loan |
| 2025-07-24 | Sang-bin Jeong | Minnesota | St. Louis CITY | €1.4m |
| 2025-07-24 | Fallou Fall | Fredrikstad FK | St. Louis CITY | €3m |
| 2025-07-22 | Devin Padelford | Minnesota | St. Louis CITY | Loan |
| 2025-07-18 | Njabulo Blom | St. Louis City Soccer Club | Thép Xanh Nam Định | Free |
| 2025-07-18 | Jaziel Orozco | St. Louis 2 | St. Louis CITY | — |