Hideki Sekine at ONE: Age of Domination on Dec 2, 2016 2. def.
Aung La Nsang at ONE: Quest for Power on Jan 14, 2017 1. def.
Ken Hasegawa at ONE: Spirit of a Warrior on Jun 29, 2018 2. def.
Mohammad Karaki at ONE: Pursuit of Greatness on Oct 26, 2018 3. def.
against Luis Santos at ONE: Valor of Champions on Apr 24, 2015 1. def.
Georgiy Kichigin at ONE: Reign of Valor on Mar 8, 2019 1. def.
Matheus Gabriel at ONE on Prime Video 5 on Dec 3, 2022 2. def.
Jadamba Narantungalag at ONE: Defending Honor on Nov 11, 2016 1. def.
Interim champion Thanh Le at ONE 166 on Mar 1, 2024 1. def.
Superbon Singha Mawynn at ONE Friday Fights 46 on Dec 22, 2023 3. def.
Toni Tauru at ONE: Kingdom of Warriors on Jul 18, 2015 4. def.
Kevin Belingon at ONE: Dynasty of Champions (Changsha) on Jan 23, 2016 5. def.
Reece McLaren at ONE: Age of Domination on Dec 2, 2016 6. def.
Brice Delval at ONE: Immortal Triumph on Sep 6, 2019 3. def.
Liam Harrison at ONE on Prime Video 1 on Aug 27, 2022 7. def.
Felipe Lobo at ONE Fight Night 19 on Feb 17, 2024 1. def.
Joshua Pacio at ONE: State of Warriors on Oct 7, 2016 1. def.
Xiong Jing Nan at ONE: Century − Part 1 on Oct 13, 2019 5. def.
Alma Juniku at ONE: Legendary Quest on Jun 15, 2019 1. def.
interim champion Janet Todd at ONE Fight Night 8 on Mar 25, 2023 2. def.
Cristina Morales at ONE Fight Night 20 on Mar 9, 2024 This table, different from the previous one, only counts the periods in which the fighter loaded the titles simultaneously and the defenses in that period of time.
Fighters with multiple title reigns in a specific division are only counted once.