/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Dmitry Bivol | 22 Feb 2025 | Current | 605 |
| Artur Beterbiev | 12 Oct 2024 | 22 Feb 2025 | 133 |
| Dmitry Bivol | 14 Oct 2017 | 10 Oct 2019 | 726 |
| Andre Ward | 19 Nov 2016 | 21 Sept 2017 | 306 |
| Sergey Kovalev | 8 Nov 2014 | 19 Nov 2016 | 742 |
| Beibut Shumenov | 29 Jan 2010 | 8 Oct 2013 | 1,348 |
| Gabriel Campillo | 20 Jun 2009 | 29 Jan 2010 | 223 |
| Hugo Garay | 3 Jul 2008 | 20 Jun 2009 | 352 |
| Danny Green | 16 Dec 2007 | 25 Mar 2008 | 100 |
| Silvio Branco | 19 Oct 2006 | 28 Apr 2007 | 191 |
| Fabrice Tiozzo | 3 Jul 2004 | 19 Oct 2006 | 838 |
| Antonio Tarver | 8 Nov 2003 | 15 May 2004 | 189 |
| Lou Del Valle | 20 Sept 1997 | 18 Jul 1998 | 301 |
| Frank Tate | 29 Sept 1992 | 13 Jun 1997 | 1,718 |
| Thomas Hearns | 3 Jun 1991 | 20 Mar 1992 | 291 |
| Virgil Hill | 5 Sept 1987 | 3 Jun 1991 | 1,367 |
| Leslie Stewart | 9 Feb 1986 | 23 May 1987 | 468 |
| Michael Spinks | 18 Jul 1981 | 5 Nov 1985 | 1,571 |
| Eddie Mustafa Muhammad | 31 Mar 1980 | 18 Jul 1981 | 474 |
| Marvin Johnson | 30 Nov 1979 | 31 Mar 1980 | 122 |
| Mike Rossman | 15 Sept 1978 | 14 Apr 1979 | 211 |
| Víctor Galíndez | 7 Dec 1974 | 15 Sept 1978 | 1,378 |
| Bob Foster | 7 Apr 1972 | 16 Sept 1974 | 892 |
| Vicente Rondón | 27 Feb 1971 | 7 Apr 1972 | 405 |
| Bob Foster | 24 May 1968 | 9 Dec 1970 | 929 |
| Dick Tiger | 16 Dec 1966 | 24 May 1968 | 525 |
| José Torres | 30 Mar 1965 | 16 Dec 1966 | 626 |
| Willie Pastrano | 1 Jun 1963 | 30 Mar 1965 | 668 |
| Harold Johnson | 7 Feb 1961 | 1 Jun 1963 | 844 |
| Archie Moore | 17 Dec 1952 | 25 Oct 1960 | 2,869 |
| Joey Maxim | 24 Jan 1950 | 17 Dec 1952 | 1,058 |
| Freddie Mills | 26 Jul 1948 | 24 Jan 1950 | 547 |
| Gus Lesnevich | 24 May 1941 | 26 Jul 1948 | 2,620 |
| Billy Conn | 13 Jul 1939 | 20 Dec 1940 | 526 |
| John Henry Lewis | 31 Oct 1935 | 19 Jun 1939 | 1,327 |
| Bob Olin | 16 Nov 1934 | 31 Oct 1935 | 349 |
| Maxie Rosenbloom | 24 Mar 1933 | 17 Sept 1934 | 542 |
| Tommy Loughran | 12 Dec 1927 | 3 Sept 1929 | 631 |
| Jack Delaney | 16 Jul 1926 | 26 Jul 1927 | 375 |
| Paul Berlenbach | 30 May 1925 | 16 Jul 1926 | 412 |
| Mike McTigue | 17 Mar 1923 | 30 May 1925 | 805 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
