Niklas Horst Castelle is a professional footballer from GER and is currently 24 years old. He is on the books of Alemannia Aachen and wears shirt number 44. His main role on the pitch is Forward. His stronger foot is Right. His estimated market valuation currently stands at 200K €.

His latest transfer saw him join SSV Ulm 1846 from Alemannia Aachen via Loan on 2026-06-30.

During the German 3.Liga 2025-2026 campaign, Niklas Horst Castelle made 22 appearances, scoring 1 goals and adding 1 assists. He averaged 0 goals per match from 20 shots, with 4 on target.