Summary of champions, Asian football quotas, and relegations in the BYD SEALION 6 LEAGUE 1 Thai League after matchday 30, the final round of the 2025-26 season.
On 10 May 2026, the final round (matchday 30) of the 2025-26 BYD SEALION 6 LEAGUE 1 Thai League concluded officially, wrapping up the season after the last matches were played.
The confirmed champion is "The Thunder Castle" Buriram United, who secured the 2025-26 Thai League title and claimed their fifth consecutive championship on 11 April, before the Songkran holiday, clinching the title with five rounds remaining. This followed True Bangkok United, known as "The Angels," failing to beat "The Swat Cats" Nakhon Ratchasima Mazda FC. Buriram also secured automatic qualification to the league phase. Port FC, nicknamed "The Sea Port Lions," finished second and also qualified automatically. Third place went to "The Dragon Kings," Ratchaburi FC, who secured a spot in the AFC Champions League group stage.
Another automatic league phase qualification spot will be awarded to the winner of the 2025-26 Chang FA Cup, currently at the semifinal stage. The semifinals feature Buriram United "The Thunder Castle" versus Ayutthaya United "The Ayodhya Warriors," and PT Prachuap FC "The Wasps" against Lamphun Warrior "The White Bulls." These matches will take place on 17 May at 19:00 Thailand time. Should Buriram win the FA Cup, the qualification spot will pass to the third-placed team in the Thai League.
Regarding relegations, "The Iron Horses" Phonkan FC, ranked 16th, were relegated earlier. Two more teams will join them going down. These are 14th place "The Kirins" Muangthong United, finishing the season with 26 points from 30 matches, and 15th place "The Swat Cats" Nakhon Ratchasima Mazda FC, who ended with 24 points from 30 matches.
The top scorer is Brazilian striker Guilherme Bissoli from champions Buriram United, who scored 23 goals. The player with the most assists is Brazilian midfielder Kaka Mendes of Port FC, who provided 14 assists.