/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Ricardo Malajika | 27 Sept 2026 | Current | 25 |
| Jesse Rodriguez | 29 Jun 2024 | 9 Jun 2026 | 710 |
| Román González | 3 Dec 2022 | 29 Jun 2024 | 574 |
| Juan Francisco Estrada | 26 Apr 2019 | 26 Mar 2021 | 700 |
| Srisaket Sor Rungvisai | 18 Mar 2017 | 26 Apr 2019 | 769 |
| Román González | 10 Sept 2016 | 18 Mar 2017 | 189 |
| Carlos Cuadras | 31 May 2014 | 10 Sept 2016 | 833 |
| Srisaket Sor Rungvisai | 3 May 2013 | 31 May 2014 | 393 |
| Yota Sato | 27 Mar 2012 | 3 May 2013 | 402 |
| Suriyan Sor Rungvisai | 19 Aug 2011 | 27 Mar 2012 | 221 |
| Tomás Rojas | 20 Sept 2010 | 10 Aug 2011 | 324 |
| Vic Darchinyan | 1 Nov 2008 | 3 Aug 2010 | 640 |
| Cristian Mijares | 6 Dec 2006 | 1 Nov 2008 | 696 |
| Masamori Tokuyama | 18 Jul 2005 | 6 Dec 2006 | 506 |
| Katsushige Kawashima | 28 Jun 2004 | 18 Jul 2005 | 385 |
| Masamori Tokuyama | 27 Aug 2000 | 28 Jun 2004 | 1,401 |
| Gerry Peñalosa | 20 Feb 1997 | 29 Aug 1998 | 555 |
| Hiroshi Kawashima | 4 May 1994 | 20 Feb 1997 | 1,023 |
| José Luis Bueno | 13 Nov 1993 | 4 May 1994 | 172 |
| Moon Sung-kil | 20 Jan 1990 | 13 Nov 1993 | 1,393 |
| Nana Konadu | 7 Nov 1989 | 20 Jan 1990 | 74 |
| Gilberto Román | 8 Apr 1988 | 7 Nov 1989 | 578 |
| Sugar Baby Rojas | 8 Aug 1987 | 8 Apr 1988 | 244 |
| Gilberto Román | 30 Mar 1986 | 16 May 1987 | 412 |
| Jiro Watanabe | 5 Jul 1984 | 30 Mar 1986 | 633 |
| Payao Poontarat | 27 Nov 1983 | 5 Jul 1984 | 221 |
| Rafael Oronó | 28 Nov 1982 | 27 Nov 1983 | 364 |
| Rafael Oronó | 2 Feb 1980 | 24 Jan 1981 | 357 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.