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| Champion | Won | Lost | Days |
|---|---|---|---|
| Yuya Wakamatsu | 16 Nov 2025 | Current | 338 |
| Superlek Kiatmuu9 | 28 Jan 2024 | 16 Nov 2025 | 658 |
| Demetrious Johnson | 5 May 2023 | 5 May 2023 | 0 |
| Rodtang Jitmuangnon | 5 May 2023 | 28 Jan 2024 | 268 |
| Superlek Kiatmuu9 | 25 Mar 2023 | 5 May 2023 | 41 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.