/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Erislandy Lara | 9 Mar 2023 | Current | 1,323 |
| Gennady Golovkin | 9 Apr 2022 | 9 Mar 2023 | 334 |
| Canelo Álvarez | 15 Sept 2018 | 1 Jan 2021 | 839 |
| Gennady Golovkin | 2 Nov 2012 | 3 Jun 2014 | 578 |
| Felix Sturm | 28 Apr 2007 | 24 Mar 2010 | 1,061 |
| Javier Castillejo | 14 Dec 2006 | 28 Apr 2007 | 135 |
| Jermain Taylor | 16 Jul 2005 | 14 Dec 2006 | 516 |
| Bernard Hopkins | 29 Sept 2001 | 5 Aug 2002 | 310 |
| William Joppy | 31 Jan 1998 | 12 May 2001 | 1,197 |
| Julio César Green | 23 Aug 1997 | 31 Jan 1998 | 161 |
| William Joppy | 24 Jun 1996 | 23 Aug 1997 | 425 |
| Shinji Takehara | 19 Dec 1995 | 24 Jun 1996 | 188 |
| Jorge Castro | 12 Aug 1994 | 19 Dec 1995 | 494 |
| John David Jackson | 1 Oct 1993 | 6 May 1994 | 217 |
| Reggie Johnson | 22 Apr 1992 | 1 Oct 1993 | 527 |
| Mike McCallum | 10 May 1989 | 4 Dec 1991 | 938 |
| Sumbu Kalambay | 23 Oct 1987 | 2 Mar 1989 | 496 |
| Vito Antuofermo | 30 Jun 1979 | 16 Mar 1980 | 260 |
| Hugo Corro | 22 Apr 1978 | 30 Jun 1979 | 434 |
| Rodrigo Valdez | 5 Nov 1977 | 22 Apr 1978 | 168 |
| Carlos Monzón | 7 Nov 1970 | 29 Aug 1977 | 2,487 |
| Nino Benvenuti | 4 Mar 1968 | 7 Nov 1970 | 978 |
| Emile Griffith | 29 Sept 1967 | 4 Mar 1968 | 157 |
| Emile Griffith | 25 Apr 1966 | 17 Apr 1967 | 357 |
| Dick Tiger | 21 Oct 1965 | 25 Apr 1966 | 186 |
| Joey Giardello | 7 Dec 1963 | 21 Oct 1965 | 684 |
| Dick Tiger | 23 Oct 1962 | 7 Dec 1963 | 410 |
| Carmen Basilio | 28 Aug 1959 | 23 Oct 1962 | 1,152 |
| Sugar Ray Robinson | 25 Mar 1958 | 4 May 1959 | 405 |
| Carmen Basilio | 23 Sept 1957 | 25 Mar 1958 | 183 |
| Sugar Ray Robinson | 9 Dec 1955 | 2 Jan 1957 | 390 |
| Bobo Olson | 21 Oct 1953 | 9 Dec 1955 | 779 |
| Sugar Ray Robinson | 12 Sept 1951 | 19 Dec 1952 | 464 |
| Jake LaMotta | 16 Jun 1949 | 14 Feb 1951 | 608 |
| Marcel Cerdan | 21 Sept 1948 | 16 Jun 1949 | 268 |
| Rocky Graziano | 16 Jul 1947 | 10 Jun 1948 | 330 |
| Tony Zale | 19 Jul 1940 | 16 Jul 1947 | 2,553 |
| Al Hostak | 27 Jun 1939 | 19 Jul 1940 | 388 |
| Solly Krieger | 1 Nov 1938 | 27 Jun 1939 | 238 |
| Freddie Steele | 11 Jul 1936 | 26 Jul 1938 | 745 |
| Eddie Babe Risko | 19 Sept 1935 | 11 Jul 1936 | 296 |
| Teddy Yarosz | 11 Sept 1934 | 19 Sept 1935 | 373 |
| Vince Dundee | 30 Oct 1933 | 11 Sept 1934 | 316 |
| Marcel Thil | 11 Jun 1932 | 19 Sept 1933 | 465 |
| Mickey Walker | 3 Dec 1926 | 19 Jun 1931 | 1,659 |
| Harry Greb | 31 Aug 1923 | 25 Feb 1926 | 909 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
