| Champion | Event | Date | Opponent |
|---|---|---|---|
| Vacated | ONE Fight Night 30 | April 5, 2025 | *Regian Eersel failed hydration |
| Regian Eersel | ONE Fight Night 25 | October 5, 2024 | Alexis Nicolas |
| Alexis Nicolas | ONE Fight Night 21 | April 6, 2024 | Regian Eersel |
| Regian Eersel | ONE: Enter The Dragon | May 17, 2019 | Nieky Holzken |
