/
| Champion | Won | Lost | Days |
|---|---|---|---|
| José Salas | 13 Dec 2025 | Current | 313 |
| Ryosuke Nishida | 4 May 2024 | 8 Jun 2025 | 400 |
| Emmanuel Rodríguez | 12 Aug 2023 | 4 May 2024 | 266 |
| Naoya Inoue | 18 May 2019 | 13 Jan 2023 | 1,336 |
| Emmanuel Rodríguez | 5 May 2018 | 18 May 2019 | 378 |
| Ryan Burnett | 10 Jun 2017 | 12 Feb 2018 | 247 |
| Lee Haskins | 20 Nov 2015 | 10 Jun 2017 | 568 |
| Randy Caballero | 25 Oct 2014 | 20 Nov 2015 | 391 |
| Stuart Hall | 21 Dec 2013 | 7 Jun 2014 | 168 |
| Leo Santa Cruz | 2 Jun 2012 | 11 Feb 2013 | 254 |
| Abner Mares | 13 Aug 2011 | 8 Feb 2012 | 179 |
| Joseph Agbeko | 11 Dec 2010 | 13 Aug 2011 | 245 |
| Yonnhy Pérez | 31 Oct 2009 | 11 Dec 2010 | 406 |
| Joseph Agbeko | 19 Sept 2007 | 31 Oct 2009 | 773 |
| Tim Austin | 19 Jul 1997 | 15 Feb 2003 | 2,037 |
| Mbulelo Botile | 29 Apr 1995 | 19 Jul 1997 | 812 |
| Orlando Canizales | 9 Jul 1988 | 21 Dec 1994 | 2,356 |
| Kelvin Seabrooks | 15 May 1987 | 9 Jul 1988 | 421 |
| Jeff Fenech | 26 Apr 1985 | 10 Feb 1987 | 655 |
| Satoshi Shingaki | 15 Apr 1984 | 26 Apr 1985 | 376 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.