| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| David Aubry | OWS/SWI | 8 November 1996 | |
| Anastasiya Azarova | OWS | 19 January 1997 | |
| Kirill Belyayev | OWS | 27 August 1997 | |
| Thore Bermel | OWS/SWI | 17 June 1998 | |
| Marion Brunel | OWS/SWI | 16 October 1996 | |
| Sophie Evans | OWS | 28 January 1999 | |
| Martina Franceschi | OWS | 19 March 1998 | |
| Attila Kiss | OWS | 14 March 1996 | |
| Nikoletta Kiss | OWS/SWI | 29 April 1997 | |
| Daniel Kober | OWS | 6 March 1997 | |
| Diego Marino | OWS | 1998 | |
| Duje Milan | OWS | 4 July 1997 | |
| Dimitrios Negris | OWS/SWI | 14 March 1998 | |
| Ádám Orosz | OWS | 22 October 1996 | |
| Paula Ruiz | OWS/SWI | 16 February 1999 | |
| Ivan Šitić | OWS | 11 January 1998 | |
| Alisia Tettamanzi | OWS/SWI | 8 February 1997 | |
| Patricia-Lucia Wartenberg | OWS | 28 February 1996 | |
| Anton Yevsikov | OWS | 25 January 1996 |