In addition to HSC Haltern-Sythen, 77 other teams from 14 different countries do play in Boys 18. They are divided into 12 different groups, whereof HSC Haltern-Sythen can be found in Group 5 together with HEI Håndbold, HK Järnvägen, SF CalHeat EU EU, Lödde Vikings HK, Nordstrand IF 3 and Redbergslids IK 1. HSC Haltern-Sythen also participated in Boys 18 during Partille Cup 2023. They reached the 1/8 Final in B18 B-Play-off, but lost it against Kolding IF with 16-24.