This is a list of ONE Championship champions in each weight division of each sport.
Current champions
+ MenDivisionChampionSinceRef.DefensesMixed martial arts Heavyweight May 15, 2026 Light heavyweightMay 15, 2026 MiddleweightMay 15, 2026Welterweight Christian Lee Nov 19, 20220LightweightAug 26, 20221Featherweight Tang KaiAug 26, 20222Bantamweight Elbek Alyshov Jul 31, 2026 0Flyweight Avazbek KholmirzaevApr 29, 20260Strawweight Joshua PacioMar 1, 20242Kickboxing Heavyweight Roman KrykliaJun 19, 20260Light Heavyweight Roman KrykliaNov 16, 20192Lightweight Regian EerselApr 10, 20260Featherweight Jan 6, 2025 1Bantamweight Jonathan Haggerty Nov 4, 2023 2Flyweight Superlek Kiatmuukao Jan 14, 2023 2Strawweight Jonathan Di Bella Oct 4, 20250Muay Thai Heavyweight Roman KrykliaDec 8, 20231Lightweight Regian EerselOct 22, 20223FeatherweightJul 21, 20260Bantamweight Yod-IQ Or.PimolsriSep 11, 20260Flyweight Asadula Imangazaliev June 26, 2026 0Strawweight Prajanchai P.K. SaenchaiDec 22, 2023 1Atomweight Nadaka YoshinariNovember 16, 20251Submission grapplingWelterweight Tye RuotoloNov 4, 20233Lightweight Kade RuotoloOct 22, 20223Flyweight Diogo Reis Dec 6, 20250
+ WomenDivisionChampionSinceRef.DefensesMixed martial artsAtomweight June 23, 2026KickboxingStrawweightFeb 14, 20260AtomweightMar 9, 20242Muay ThaiStrawweight Stella Hemetsberger Sep 6, 2025 – 1AtomweightAug 28, 20205
Men's championship history Heavyweight World Championship Weight limit — MMA: — Kickboxing / Muay Thai: Unlimited
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Brandon VeraDec 11, 20152 Arjan BhullarONE: Dangal May 15, 2021 769 days — Anatoly Malykhin ONE: Bad Blood Feb 11, 2022 —3 Anatoly MalykhinONE Friday Fights 22 Jun 23, 2023 505 days4 Oumar KaneONE 169 Nov 9, 2024 552 days5 Anatoly Malykhin The Inner Circle 14 May 15, 2026 The title was vacated after Malykhin announced his retirement from MMA on May 15, 2026.Muay ThaiNo.NameEventDateReignDefenses1 Roman KrykliaONE Fight Night 17 Dec 8, 2023 (incumbent)1. def. Lyndon Knowles at ONE Fight Night 30 on April 5, 2025KickboxingNo.NameEventDateReignDefenses1 Samet AgdeveONE Fight Night 37 Nov 8, 2025 223 days2 Roman KrykliaThe Inner Circle 19 Jun 19, 2026 (incumbent)
Light Heavyweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Roger GracieMay 6, 2016The title was vacated after Roger Gracie announced his retirement from MMA on October 14, 2017.2 Aung La NsangONE: Quest for GoldFeb 23, 20183 Reinier de RidderONE on TNT 4Apr 28, 20214Dec 3, 2022 The title was vacated after Malykhin announced his retirement from MMA on May 15, 2026.KickboxingNo.NameEventDateReignDefenses1 Nov 16, 2019(incumbent)
Middleweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Igor SviridNov 7, 20142 Vitaly BigdashONE: Tigers of AsiaOct 9, 20153 Aung La NsangONE: Light of a NationJun 30, 20174ONE: Inside the MatrixOct 30, 20205Mar 1, 2024 The title was vacated after Malykhin announced his retirement from MMA on May 15, 2026.
Welterweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Nobutatsu Suzuki ONE: War of Nations Mar 14, 2014 2 Ben Askren Aug 29, 2014 Askren vacated the title on October 27, 2018 when he was released from his contract.3 ONE: Warrior's Dream Nov 17, 2018 4 Kiamrian AbbasovONE: Dawn Of Valor Oct 25, 2019 Abbasov was stripped of the title on November 17, 2022, after failing to make weight for his title defense against Christian Lee at ONE on Prime Video 4.5ONE on Prime Video 4Nov 19, 2022(incumbent)Submission grapplingNo.NameEventDateReignDefenses1 Tye Ruotolo ONE Fight Night 16 Nov 4, 2023 (incumbent)
Lightweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Kotetsu BokuONE: Rise of KingsOct 6, 20122 Shinya AokiONE: Kings and ChampionsApr 5, 20133 Eduard FolayangONE: Defending HonorNov 11, 20164 Martin NguyenONE: Legends of the WorldNov 10, 2017Nguyen vacated the title on September 28, 2018 due to suffering an injury in training, rendering him unable to defend the title.5Nov 23, 2018 (492 days)6 Shinya Aoki ONE: A New EraMar 31, 2019(1410 days)7 Christian LeeONE: Enter the DragonMay 17, 20198 Ok Rae-yoonONE: RevolutionSep 24, 20219 Christian Lee ONE 160Aug 26, 2022(incumbent) KickboxingNo.NameEventDateReignDefenses1May 17, 20192 Alexis NicolasONE Fight Night 21April 6, 2024182 days3 Regian Eersel ONE Fight Night 25Oct 5, 2024180 days (1966 days)Eersel was stripped of the title on April 3, 2025, after failing to hydration test for his title defense against Alexis Nicolas at ONE Fight Night 30.4 Apr 10, 2026(incumbent)Muay ThaiNo.NameEventDateReignDefenses1 Regian EerselONE on Prime Video 3 Oct 22, 2022 (incumbent)Submission grapplingNo.NameEventDateReignDefenses1 Kade RuotoloONE on Prime Video 3 Oct 22, 2022 (incumbent)
Featherweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Honorio BanarioONE: Return of WarriorsFeb 2, 20132 Koji OishiONE FC: Rise to PowerMay 31, 20133ONE: Reign of ChampionsAug 29, 2014 — Marat GafurovONE: Odyssey of ChampionsSep 27, 2015—4 Marat GafurovNov 21, 20155 Martin NguyenONE: Quest for GreatnessAug 18, 20176 Thanh LeONE: Inside the MatrixOct 30, 20207 Tang KaiONE 160Aug 26, 2022(incumbent) — Thanh LeONE Fight Night 15Oct 7, 2023—KickboxingNo.NameEventDateReignDefenses1Oct 15, 20212 Chingiz AllazovONE Fight Night 6Jan 14, 2023 — Superbon Singha MawynnONE Friday Fights 58Apr 5, 2024—Allazov vacated the title on August 31, 2024, when he was released from his contract. Interim champion Superbon was officially promoted to undisputed champion on January 6, 2025.3–Jan 6, 2025(incumbent)– Masaaki Noiri ONE 172 Mar 3, 2025—Muay ThaiNo.NameEventDateReignDefenses1Feb 7, 20202 Tawanchai P.K. SaenchaiSep 29, 20221391 days– Nico Carrillo ONE Fight Night 40 Feb 14, 2026—Tawanchai vacated the title on July 21, 2026, due to a leg injury.3 Nico Carrillo–Jul 21, 2026(incumbent)
Bantamweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Kim Soo-chulONE FC: Rise of KingsOct 6, 2012 — Bibiano FernandesONE FC: Rise to PowerMay 31, 2013—2 Bibiano FernandesOct 18, 2013 — Kevin BelingonONE: Reign of KingsJul 27, 2018—3 Kevin BelingonONE: Heart of the LionNov 9, 20184 Bibiano Fernandes ONE: A New EraMar 31, 20195 John LinekerONE: Lights OutMar 11, 2022Lineker was stripped of the title on October 20, 2022, after failing to make weight for his title defense against Fabrício Andrade at ONE on Prime Video 3.6 Fabrício AndradeONE Fight Night 7Feb 25, 20237 Enkh-Orgil BaatarkhuuONE Fight Night 38Dec 6, 2025237 days8 Elbek AlyshovONE: The Inner Circle 24Jul 31, 2026(incumbent)KickboxingNo.NameEventDateReignDefenses1 Alaverdi RamazanovDec 6, 20192ONE: UnbreakableJan 22, 20213 Hiroki AkimotoONE: XMar 26, 20224 Petchtanong PetchfergusONE 163Nov 19, 2022Petchtanong was stripped of the title on July 26, 2023, due to tested positive for both metenolone and noldenone, which is a banned substance according to International Doping Tests & Management.5Nov 4, 2023(incumbent) Muay ThaiNo.NameEventDateReignDefenses1Feb 16, 20192Apr 22, 2023503 days3 Superlek KaitmuukaoSep 6, 2024183 days– Nabil Anane ONE 170Jan 24, 2025–Superlek was stripped of the title on March 22, 2025, after failing to hydration test for his title unification bout against Nabil Anane at ONE 172. Anane has officially promoted to undisputed champion during ONE Friday Fights 114 on June 27, 2025.4 Nabil Anane –Jun 27, 2025266 days5 Rambolek Chor.AjalaboonMar 20, 2026Rambolek was stripped of the title on September 10, 2026, after failing to hydration test for his title unification bout against Yod-IQ Or.Pimonsri at ONE: The Inner Circle 30.6 Yod-IQ Or.PimolsriSep 11, 2026(incumbent)
Flyweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Adriano MoraesONE: Rise of the KingdomSep 12, 20142 Kairat AkhmetovNov 21, 2015 — Adriano MoraesONE: Heroes of the WorldAug 13, 2016—3 Adriano Moraes ONE: Kings & ConquerorsAug 5, 2017 (757 days) — Geje Eustaquio ONE: Global SuperheroesJan 26, 2018—4 Geje EustaquioONE: Pinnacle of PowerJun 23, 20185 Adriano Moraes ONE: Hero's AscentJan 25, 2019(2067 days)6 Demetrious JohnsonONE on Prime Video 1Aug 27, 2022741 days Johnson announced his retirement from MMA during at ONE 168 on September 6, 2024.7 Yuya Wakamatsu ONE 172 Mar 23, 2025 402 days8 Avazbek KholmirzaevONE Samurai 1 Apr 29, 2026 (incumbent)KickboxingNo.NameEventDateReignDefenses1May 10, 20192 Ilias EnnahachiONE: Dreams of GoldAug 16, 2019Ennahachi vacated the belt on January 3, 2023, due to his inability to make the flyweight limit of 135 pounds while hydrated.3 Superlek KiatmuukaoJan 14, 2023– Takeru Segawa ONE Samurai 1 Apr 29, 2026 (incumbent)Superlek vacated the title on September 24, 2026, due to a knee injury.Muay ThaiNo.NameEventDateReignDefenses1 Sam-A GaiyanghadaoMay 18, 20182 Jonathan HaggertyONE: For HonorMay 4, 20193ONE: Dawn of HeroesAug 2, 20191924 days Rodtang was stripped of the title on November 7, 2024, after failing to make weight and failing his hydration test for his title defense against Jacob Smith at ONE 169.4Jun 26, 2026(incumbent)Submission grapplingNo.NameEventDateReignDefenses1 Mikey Musumeci ONE on Prime Video 2 Oct 1, 2022 705 days Musumeci was stripped of the title on September 5, 2024, after failing to make weight for his title defense against Bebeto Oliveira at ONE 168.2 Diogo Reis ONE Fight Night 38 Dec 6, 2025 (incumbent)
Strawweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1ONE: Warrior's QuestMay 22, 20152 Yoshitaka NaitoMay 27, 20163 Alex SilvaONE: Warriors of the WorldDec 9, 20174 Yoshitaka Naito ONE: Grits And GloryMay 12, 2018 (694 days)5 Joshua PacioONE: Conquest of HeroesSep 22, 20186 Yosuke SarutaONE: Eternal GloryJan 19, 20197 Joshua Pacio Apr 12, 2019 (1450 days)8 Jarred BrooksDec 3, 20229 Joshua Pacio ONE 166Mar 1, 2024(incumbent)1. def. Interim champion Jarred Brooks at ONE 171: Qatar on Feb 20, 20252. def. Mansur Malachiev at The Inner Circle 21 on Jul 10, 2026 — Jarred Brooks ONE Fight Night 24Aug 3, 2024—KickboxingNo.NameEventDateReignDefenses1Dec 6, 2019Sam-A vacated the title on February 19, 2022 due to retirement.2 Jonathan Di Bella ONE 162Oct 21, 2022Di Bella was stripped of the title on April 4, 2024, after failing to make hydration for his title defense against Prajanchai P.K. Saenchai at ONE Friday Fights 58. He was stripped of his title after failing to meet the required hydration levels at the weigh-ins.3 ONE Friday Fights 68Jun 28, 2024463 days — Jonathan Di Bella ONE 172 Mar 23, 2025 – 4 Jonathan Di Bella ONE Fight Night 36 Oct 4, 2025 (incumbent)Muay ThaiNo.NameEventDateReignDefenses1 Sam-A GaiyanghadaoFeb 28, 20202ONE: BattlegroundJul 30, 20213 Joseph LasiriONE 157May 20, 2022 — Prajanchai P.K. Saenchai ONE Friday Fights 22 Jun 23, 2023 —4 Prajanchai P.K. Saenchai ONE Friday Fights 46 Dec 22, 2023(incumbent)1. def. Ellis Barboza at ONE Fight Night 28 on Feb 7, 2025 — Aliff Sor Dechapan The Inner Circle 23 Jul 24, 2026 —
Atomweight World Championship Weight limit:
Muay ThaiNo.NameEventDateReignDefenses1 Nadaka YoshinariONE 173Nov 16, 2025(incumbent)
Women's championship history Women's Strawweight World Championship Weight limit:
Mixed martial arts (MMA)No.NameEventDateReignDefenses1 Jan 20, 2018On March 26, 2026, it was announced that the Women's Strawweight MMA division was being discontinued.Kickboxing1 Nov 9, 20242 Feb 14, 2026(incumbent)Muay Thai1ONE 156Apr 22, 2022Sundell was stripped of the title on May 2, 2024, after failing to make weight for her title defense against Natalia Diachkova at ONE Fight Night 22.2ONE Fight Night 35Sept 6, 2025 (incumbent)
Women's Atomweight World Championship Weight limit: