| Link | Location |
|---|
| Zi Kai Ong | Singapore, Singapore |
| Takeshi Onodera | Tokyo, Japan |
| Obiorah Onyesoh | Central London, United Kingdom of Great Britain and Northern Ireland |
| Shota Oonuma | Tokyo, Japan |
| Jikke op de Weegh | Den Haag, Netherlands |
| Keisuke Orita | Tokyo, Japan |
| Kirill Orlov | Moscow, Russian Federation |
| Claudia Orozco-Gomez | Toulouse, France |
| Rosendo Ortiz | mexico city, Mexico |
| Takayasu Osamu | Tokyo, Japan |
| Tsukasa Osawa | Tokyo, Japan |
| Pavel Osin | Moscow, Russian Federation |
| Kamil Osiński | Warszawa, Poland |
| Miłosz Osiński | Warszawa, Poland |
| Devin Osterhout | Salt Lake City, Utah, United States of America |
