Timothé Sembéry Mumenthaler OLY (born 12 December 2002) is a Swiss sprinter.

[5] However, after running 100m in 10.61 seconds aged 16 years-old, his progress was slowed by injury.

[7] He finished fifth in the 200 metres at the 2023 European Athletics Team Championships First Division in Silesia in June 2023.

[10][11] He competed at the 2024 European Athletics Championships in Rome and won the final of the Men's 200 metres, running 20.28 seconds.

He is currently pursuing a BSc in microengineering at Ecole polytechnique fédérale de Lausanne (EPFL) in parallel with his athletic career.