THE REF by Glass Jaw

ONE Heavyweight World Championship

🇸🇬ONE Championship. Founded in Singapore in 2011. It runs MMA, Muay Thai and kickboxing on the same cards across Asia.

EST. DEC 11, 2015 · 5 REIGNS · 7 TITLE FIGHTS · 4 CHAMPIONS

ONE crowned its first heavyweight champion in December 2015 near Manila. This is the MMA belt. ONE also has heavyweight Muay Thai and kickboxing belts.

Vacant since May 15, 2026, when Anatoly Malykhin won it back and retired the same night.

ONE Heavyweight World ChampionshipBELT VACANTSINCE MAY 15, 2026Anatoly Malykhin RETIRED WITH THE BELT
MOST DEFENSES2Brandon VeraNO. 1MOST REIGNS2Anatoly MalykhinNO. 3, NO. 5LONGEST REIGN5 YRS 4 MOSBrandon VeraNO. 1SHORTEST REIGN0 DAYSAnatoly MalykhinNO. 5

EVERY REIGN, BY DEFENSES

5 REIGNS · 7 TITLE FIGHTS · SINCE DEC 11, 2015
NO. 1 · Brandon Vera · DEC 11, 2015NO. 5 · Anatoly Malykhin · MAY 15, 2026

ROLL OF CHAMPIONS

Newest first. Open a reign for its defenses.

BELT VACANT · MAY 15, 2026Malykhin left his gloves in the ring and retired the night he won the belt back. All three of his ONE belts went vacant.
NO.NO. 5CHAMPION🇷🇺Anatoly Malykhin"Sladkiy"WONMAY 15, 2026TOOK IT FROMOumar KaneHOWKO R4 1:54DEFENSES0HELD0 DAYSENDEDRETIRED

HOW IT STARTED · MAY 15, 2026

TOOK IT FROM Oumar KaneThe Inner Circle 14ONEMAY 15, 2026KO (punches) · R4 1:54

Bangkok, Thailand

Held with ONE Friday Fights 154 at Lumpinee Stadium.

HOW IT ENDED · MAY 15, 2026

RETIRED.

  • A reign of one night.

SOURCES: en.wikipedia.org, sherdog.com

NO.NO. 4CHAMPION🇸🇳Oumar Kane"Reug Reug"WONNOV 9, 2024TOOK IT FROMAnatoly MalykhinHOWDEC (split)DEFENSES0HELD1 YR 6 MOSENDEDLOST TO Anatoly Malykhin

HOW IT STARTED · NOV 9, 2024

TOOK IT FROM Anatoly MalykhinONE 169: Malykhin vs. Reug ReugONENOV 9, 2024DEC (split)

Bangkok, Thailand

Sherdog lists the US broadcast date, November 8.

HOW IT ENDED · MAY 15, 2026

LOST TO Anatoly MalykhinThe Inner Circle 14ONEMAY 15, 2026KO (punches) · R4 1:54

  • Handed Malykhin the first loss of his career.

SOURCES: en.wikipedia.org, sherdog.com

NO.NO. 3CHAMPION🇷🇺Anatoly Malykhin"Sladkiy"WONJUN 23, 2023TOOK IT FROMArjan BhullarHOWTKO R3 2:42DEFENSES0HELD1 YR 4 MOSENDEDLOST TO Oumar Kane

HOW IT STARTED · JUN 23, 2023

TOOK IT FROM Arjan BhullarONE Friday Fights 22ONEJUN 23, 2023TKO (punches) · R3 2:42

Bangkok, Thailand

Unification bout.

HOW IT ENDED · NOV 9, 2024

LOST TO Oumar KaneONE 169: Malykhin vs. Reug ReugONENOV 9, 2024DEC (split)

  • Held ONE's light heavyweight belt at the same time and added the middleweight belt in March 2024.

SOURCES: en.wikipedia.org, sherdog.com

NO.NO. 2CHAMPION🇨🇦Arjan BhullarWONAPR 28, 2021TOOK IT FROMBrandon VeraHOWTKO R2 4:27DEFENSES0HELD2 YRS 1 MOENDEDLOST TO Anatoly Malykhin

HOW IT STARTED · APR 28, 2021

TOOK IT FROM Brandon VeraONE Championship: DangalONEAPR 28, 2021TKO (punches) · R2 4:27

Kallang, Singapore

Taped April 28, 2021 and first aired May 15, 2021.

HOW IT ENDED · JUN 23, 2023

LOST TO Anatoly MalykhinONE Friday Fights 22ONEJUN 23, 2023TKO (punches) · R3 2:42

  • Never defended. He did not fight again for more than two years.

SOURCES: en.wikipedia.org, sherdog.com

NO.NO. 1CHAMPION🇺🇸Brandon Vera"The Truth"WONDEC 11, 2015TOOK IT FROMPaul Cheng (NEW BELT)HOWKO R1 0:26DEFENSES2HELD5 YRS 4 MOSENDEDLOST TO Arjan Bhullar

HOW IT STARTED · DEC 11, 2015

WON THE NEW BELT OVER Paul ChengONE Championship: Spirit of ChampionsONEDEC 11, 2015KO (punch and head kick) · R1 0:26

Pasay, Philippines

For the inaugural belt.

THE DEFENSES

DATERESULTOPPONENTHOWEVENTPROMOTION
DEC 2, 2016W🇯🇵Hideki SekineTKO (body kick and punches) · R1 3:11ONE Championship: Age of DominationONE
NOV 23, 2018W🇮🇹Mauro CerilliKO (punch) · R1 1:04ONE Championship: Conquest of ChampionsONE

HOW IT ENDED · APR 28, 2021

LOST TO Arjan BhullarONE Championship: DangalONEAPR 28, 2021TKO (punches) · R2 4:27

  • Held it more than five years with two defenses.

SOURCES: en.wikipedia.org, sherdog.com

INTERIM BELTS

Stand-in belts, kept apart from the numbered reigns.

INTERIM CHAMPION🇷🇺Anatoly Malykhin"Sladkiy"WONFEB 11, 2022BEATKirill GrishenkoHOWKO R2 3:42DEFENSES0ENDEDUNIFIED: Arjan Bhullar

HOW IT STARTED · FEB 11, 2022

ONE Championship: Bad BloodONEFEB 11, 2022KO (punch) · R2 3:42

HOW IT ENDED · JUN 23, 2023

UNIFIED: Arjan BhullarONE Friday Fights 22ONEJUN 23, 2023TKO (punches) · R3 2:42

  • Won while champion Arjan Bhullar was out of action.

SOURCES: en.wikipedia.org, sherdog.com

WHERE THE BELT WENT

The belt is still in play. ONE still promotes fights.

Follow the belt through the line ▶

SOURCES

SHOW ALL 22 SOURCES
  1. https://en.wikipedia.org/wiki/List_of_ONE_Championship_champions
  2. https://cagesidepress.com/2026/05/15/anatoly-malykhin-wins-back-heavyweight-title-from-reug-reug-retires/
  3. https://www.lowkickmma.com/anatoly-malykhin-regains-one-crown-retires-and-effectively-vacates-3-titles/
  4. https://www.sherdog.com/fighter/Anatoly-Malykhin-256721
  5. https://en.wikipedia.org/wiki/ONE_Championship
  6. https://www.onefc.com/
  7. https://en.wikipedia.org/wiki/2015_in_ONE_Championship#ONE_Championship:_Spirit_of_Champions
  8. https://www.sherdog.com/events/One-Championship-36-Spirit-of-Champions-46887
  9. https://en.wikipedia.org/wiki/2016_in_ONE_Championship#ONE_Championship:_Age_of_Domination
  10. https://www.sherdog.com/events/One-Championship-Age-of-Domination-49617
  11. https://en.wikipedia.org/wiki/2018_in_ONE_Championship#ONE_Championship:_Conquest_of_Champions
  12. https://www.sherdog.com/events/One-Championship-Conquest-of-Champions-67327
  13. https://en.wikipedia.org/wiki/2021_in_ONE_Championship#ONE_Championship:_Dangal
  14. https://www.sherdog.com/events/One-Championship-Dangal-89278
  15. https://en.wikipedia.org/wiki/ONE_Friday_Fights_22
  16. https://www.sherdog.com/events/One-Championship-One-Friday-Fights-22-97977
  17. https://en.wikipedia.org/wiki/ONE_169
  18. https://www.sherdog.com/events/One-Championship-One-169-Bangkok-101164
  19. https://en.wikipedia.org/wiki/2026_in_ONE_Championship#ONE_Friday_Fights_154_&_The_Inner_Circle_14
  20. https://www.sherdog.com/events/One-Championship-One-Friday-Fights-154-112346
  21. https://en.wikipedia.org/wiki/2022_in_ONE_Championship#ONE_Championship:_Bad_Blood
  22. https://www.sherdog.com/events/One-Championship-Bad-Blood-91595

EVERY BELT IN THE DIVISION