/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Naoya Inoue | 26 Dec 2023 | Current | 1,029 |
| Murodjon Akhmadaliev | 30 Jan 2020 | 8 Apr 2023 | 1,164 |
| Daniel Roman | 9 Dec 2017 | 26 Apr 2019 | 503 |
| Guillermo Rigondeaux | 14 May 2016 | 9 Dec 2017 | 574 |
| Scott Quigg | 30 Oct 2015 | 27 Feb 2016 | 120 |
| Guillermo Rigondeaux | 20 Jan 2012 | 13 Apr 2013 | 449 |
| Rico Ramos | 9 Jul 2011 | 20 Jan 2012 | 195 |
| Lee Ryol-li | 10 Dec 2010 | 31 Jan 2011 | 52 |
| Celestino Caballero | 4 Oct 2006 | 21 Nov 2008 | 779 |
| Mahyar Monshipour | 4 Jul 2003 | 18 Mar 2006 | 988 |
| Salim Medjkoune | 9 Oct 2002 | 4 Jul 2003 | 268 |
| Yober Ortega | 17 Nov 2001 | 21 Feb 2002 | 96 |
| Clarence Adams | 4 Mar 2000 | 3 Jul 2001 | 486 |
| Néstor Garza | 12 Dec 1998 | 4 Mar 2000 | 448 |
| Antonio Cermeño | 13 May 1995 | 4 Oct 1997 | 875 |
| Wilfredo Vázquez | 27 Mar 1992 | 13 May 1995 | 1,142 |
| Raúl Pérez | 7 Oct 1991 | 27 Mar 1992 | 172 |
| Jesus Salud | 11 Nov 1989 | 5 Apr 1990 | 145 |
| Juan José Estrada | 28 May 1988 | 11 Nov 1989 | 532 |
| Julio Gervacio | 28 Nov 1987 | 27 Feb 1988 | 91 |
| Victor Callejas | 26 May 1984 | 21 Nov 1986 | 909 |
| Leo Cruz | 12 Jun 1982 | 22 Feb 1984 | 620 |
| Sergio Víctor Palma | 9 Aug 1980 | 12 Jun 1982 | 672 |
| Ricardo Cardona | 7 May 1978 | 4 May 1980 | 728 |
| Hong Soo-hwan | 26 Nov 1977 | 7 May 1978 | 162 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
