/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Naoya Inoue | 26 Dec 2023 | Current | 1,030 |
| Murodjon Akhmadaliev | 30 Jan 2020 | 8 Apr 2023 | 1,164 |
| Daniel Roman | 26 Apr 2019 | 30 Jan 2020 | 279 |
| TJ Doheny | 16 Aug 2018 | 26 Apr 2019 | 253 |
| Ryōsuke Iwasa | 13 Sept 2017 | 16 Aug 2018 | 337 |
| Yukinori Oguni | 31 Dec 2016 | 13 Sept 2017 | 256 |
| Carl Frampton | 6 Sept 2014 | 28 Apr 2016 | 600 |
| Kiko Martínez | 17 Aug 2013 | 6 Sept 2014 | 385 |
| Takalani Ndlovu | 26 Mar 2011 | 24 Mar 2012 | 364 |
| Takalani Ndlovu | 27 Mar 2010 | 26 Mar 2011 | 364 |
| Celestino Caballero | 21 Nov 2008 | 10 Feb 2010 | 446 |
| Steve Molitor | 10 Nov 2006 | 21 Nov 2008 | 742 |
| Israel Vázquez | 25 Mar 2004 | 19 Apr 2006 | 755 |
| Manny Pacquiao | 23 Jun 2001 | 16 Jan 2004 | 937 |
| Vuyani Bungu | 20 Aug 1994 | 11 Mar 1999 | 1,664 |
| Kennedy McKinney | 2 Dec 1992 | 20 Aug 1994 | 626 |
| Welcome Ncita | 10 Mar 1990 | 2 Dec 1992 | 998 |
| Fabrice Benichou | 10 Mar 1989 | 10 Mar 1990 | 365 |
| Jose Sanabria | 21 May 1988 | 10 Mar 1989 | 293 |
| Lee Seung-hoon | 18 Jan 1987 | 23 Mar 1988 | 430 |
| Kim Ji-won | 3 Jan 1985 | 12 Dec 1986 | 708 |
| Suh Sung-in | 15 Apr 1984 | 3 Jan 1985 | 263 |
| Bobby Berna | 4 Dec 1983 | 15 Apr 1984 | 133 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
