As of 7 September 2026, the world boxing landscape has been significantly altered by the retirement of Katie Taylor, who vacated the undisputed super lightweight championship (WBA, WBC, IBF, WBO, and Ring) following her farewell victory on 5 September 2026. Additionally, the IBF lightweight title is now vacant after Raymond Muratalla officially stepped down on 3 September 2026 to move up in weight, while the heavyweight division remains fragmented among four primary titleholders following Filip Hrgovic's recent IBF victory.
- Super Lightweight Title Vacancies: All major world titles (WBA, WBC, IBF, WBO, and Ring Magazine) in the super lightweight division are currently vacant following the retirement of undisputed champion Katie Taylor on 5 September 2026.
- Heavyweight Champions: WBA (Super) & Ring: Oleksandr Usyk; WBA (World): Murat Gassiev; WBC: Agit Kabayel; IBF: Filip Hrgovic (won 29 Aug 2026); WBO: Daniel Dubois.
- Lightweight Title Status: The IBF Lightweight title is vacant as of 3 September 2026 following Raymond Muratalla's move to the 140-pound division. Other champions include William Zepeda (WBC) and Abdullah Mason (WBO).
- Welterweight & Middleweight Champions: Welterweight: Teofimo Lopez (WBA), Ryan Garcia (WBC), Liam Paro (IBF), Devin Haney (WBO). Middleweight: Aaron McKenna (IBF), Erislandy Lara (WBA), Carlos Adames (WBC), Janibek Alimkhanuly (WBO).
- New WBA Champions in Japan: On 2 September 2026, Daiya Kira captured the WBA Light Flyweight title and Takeshi Ishii won the WBA Minimumweight title in Tokyo.