| # | Champion | Event | Date | Opponent |
|---|---|---|---|---|
| IC | Masaaki Noiri | ONE 172 | March 23, 2025 | Tawanchai PK Saenchai |
| 3 | Superbon Singhamawynn | – | January 7, 2025 | – |
| IC | Superbon Singhamawynn | ONE Friday Fights 58 | April 5, 2024 | Marat Grigorian |
| 2 | Chingiz Allazov | ONE Fight Night 6 | January 14, 2023 | Superbon Singhamawynn |
| 1 | Superbon Singhamawynn | ONE: First Strike | October 25, 2021 | Giorgio Petrosyan |
