/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Naoya Inoue | 25 Jul 2023 | Current | 1,184 |
| Stephen Fulton | 23 Jan 2021 | 25 Jul 2023 | 913 |
| Angelo Leo | 1 Aug 2020 | 23 Jan 2021 | 175 |
| Emanuel Navarrete | 8 Dec 2018 | 11 Jul 2020 | 581 |
| Nonito Donaire | 11 Dec 2015 | 5 Nov 2016 | 330 |
| Guillermo Rigondeaux | 13 Apr 2013 | 28 Oct 2015 | 928 |
| Nonito Donaire | 4 Feb 2012 | 13 Apr 2013 | 434 |
| Wilfredo Vázquez, Jr. | 27 Feb 2010 | 7 May 2011 | 434 |
| Daniel Ponce de León | 29 Oct 2005 | 7 Jun 2008 | 952 |
| Joan Guzmán | 17 Aug 2002 | 4 Jul 2005 | 1,052 |
| Agapito Sánchez | 23 Jun 2001 | 13 Aug 2002 | 416 |
| Marco Antonio Barrera | 24 Feb 2000 | 1 Jun 2001 | 463 |
| Richie Wenton | 31 Oct 1998 | 19 Feb 2000 | 476 |
| Kennedy McKinney | 18 Apr 1997 | 30 May 1998 | 407 |
| Junior Jones | 22 Nov 1996 | 18 Apr 1997 | 147 |
| Marco Antonio Barrera | 31 Mar 1995 | 22 Nov 1996 | 602 |
| Daniel Jiménez | 9 Jun 1993 | 31 Mar 1995 | 660 |
| Duke McKenzie | 15 Oct 1992 | 9 Jun 1993 | 237 |
| Jesse Benavides | 24 May 1991 | 15 Oct 1992 | 510 |
| Orlando Fernandez | 12 May 1990 | 24 May 1991 | 377 |
| Valerio Nati | 9 Dec 1989 | 12 May 1990 | 154 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
