Heavyweight (+200 lbs IBF, WBO; +224 lbs WBA, WBC)
- IBF: Vacant
- WBA: Vacant*
- WBC: Vacant**
- WBO: Daniel Dubois (UK)
*WBA Regular: Murat Gassiev
**WBC Interim: Agit Kabayel (DE)
Bridgerweight (224 lbs WBA, WBC)
- IBF: N/A
- WBA: Muslim Gadzhimagomedov
- WBC: Kevin Lerena (ZA)
- WBO: N/A
*WBA Interim: Vartan Arutyunyan
**WBC Interim: Krzysztof Wlodarczyk (PL)
Cruiserweight (200 lbs)
- IBF: Vacant
- WBA: David Benavidez (US)
- WBC: Noel Mikaelian (DE)*
- WBO: David Benavidez (US)
*WBC Interim: Michal Cieslak (PL)
Light Heavyweight (175 lbs)
- IBF: Dmitry Bivol (KG)
- WBA: Dmitry Bivol (KG)*
- WBC: David Benavidez (US)
- WBO: Dmitry Bivol (KG)**
*WBA Regular: David Benavidez (US)
*WBA Interim: Albert Ramirez (VE)
**WBO Interim: Callum Smith (UK)
Super Middleweight (168 lbs)
- IBF: Osleys Iglesias (CU)
- WBA: Jaime Munguia (MX)
- WBC: Christian Mbilli (FR)*
- WBO: Hamzah Sheeraz (UK)
*WBC Interim: Lester Martinez (GT)
Middleweight (160 lbs)
- IBF: Vacant
- WBA: Erislandy Lara (CU)
- WBC: Carlos Adames (DO)*
- WBO: Janibek Alimkhanuly (KZ)**
*WBC Interim: Jesus Ramos (US)
**WBO Interim: Denzel Bentley (UK)
Super Welterweight (154 lbs)
Also known as Junior Middleweight or Light Middleweight
- IBF: Josh Kelly (UK)
- WBA: Jaron Ennis (US)
- WBC: Sebastian Fundora (US)*
- WBO: Jaron Ennis (US)
*WBC Interim: Vergil Ortiz Jr. (US)
Welterweight (147 lbs)
- IBF: Liam Paro (AU)
- WBA: Rolando Romero (US)*
- WBC: Ryan Garcia (US)
- WBO: Devin Haney (US)
*WBA Regular: Jack Catterall (UK)
Super Lightweight (140 lbs)
Also known as Junior Welterweight or Light Welterweight
- IBF: Richardson Hitchins (US)
- WBA: Gary Antuanne Russell (US)
- WBC: Dalton Smith (UK)
- WBO: Shakur Stevenson (US)
*WBC Interim: Isaac Cruz (MX)
Lightweight (135 lbs)
- IBF: Raymond Muratalla (US)
- WBA: Vacant
- WBC: Vacant
- WBO: Abdullah Mason (US)
*WBC Interim: Jadier Herrera (CU)
Super Featherweight (130 lbs)
Also known as Junior Lightweight
- IBF: Emanuel Navarrete (MX)
- WBA: Anthony Cacace (UK)*
- WBC: O’Shaquie Foster (US)**
- WBO: Emanuel Navarrete (MX)
*WBA Interim: Elnur Samedov (AZ)
**WBC Interim: Ryan Garner (UK)
Featherweight (126 lbs)
- IBF: Angelo Leo (US)
- WBA: Brandon Figueroa (US)*
- WBC: Bruce Carrington (US)
- WBO: Rafael Espinoza (MX)
*WBA Interim: Mirco Cuello (AR)
Super Bantamweight (122 lbs)
Also known as Junior Featherweight
- IBF: Naoya Inoue (JP)
- WBA: Naoya Inoue (JP)*
- WBC: Naoya Inoue (JP)
- WBO: Naoya Inoue (JP)
*WBA Interim: Victor Santillan (DO)
Bantamweight (118 lbs)
- IBF: Jose Salas Reyes (MX)
- WBA: Jesse Rodriguez (US)
- WBC: Takuma Inoue (JP)
- WBO: Christian Medina (MX)
Super Flyweight (115 lbs)
Also known as Junior Bantamweight
- IBF: Andrew Moloney (AU)
- WBA: Jesse Rodriguez (US)
- WBC: Jesse Rodriguez (US)
- WBO: Jesse Rodriguez (US)
*WBA Interim: David Jimenez (CR)
Flyweight (112 lbs)
- IBF: Masamichi Yabuki (JP)
- WBA: Ricardo Rafael Sandoval (US)*
- WBC: Ricardo Rafael Sandoval (US)**
- WBO: Anthony Olascuaga (US)
*WBA Interim: Abraham Perez (US)
**WBC Interim: Francisco Rodriguez Jr (MX)
Super Strawweight (108 lbs)
Also known as Junior Flyweight or Light Flyweight
- IBF: Thanongsak Simsri (TH)
- WBA: Rene Santiago (PR)
- WBC: Shokichi Iwata (JP)
- WBO: Rene Santiago (PR)
Strawweight (105 lbs)
Also known as Mini Flyweight, Minimumweight or Super Atomweight
- IBF: Pedro Taduran (PH)
- WBA: Oscar Collazo (PR)*
- WBC: Melvin Jerusalem (PH)
- WBO: Oscar Collazo (PR)
*WBA Regular: Ryusei Matsumoto (JP)