| Chearavanont Soopakij | 15-Sep-14 | 24-Feb-26 | Ch | | Re-designated from a non-executive director to an executive director as he will take on an executive role in the Group |
| Phityaisarakul Thirayut | 15-Feb-88 | 24-Feb-26 | Dir | | Ceased to be the CEO (Biochemical Division) following the appointment of Mr. Na Muangtoun. He remains as an executive director |
| Phityaisarakul Thirayut | 15-Sep-14 | 24-Feb-26 | ED | | Ceased to be the CEO (Biochemical Division) following the appointment of Mr. Na Muangtoun. He remains as an executive director |
| Seriburi Thanakorn | 12-Feb-88 | 24-Feb-26 | ED | | Resigned to devote more time to personal commitments. |
| Phityaisarakul Thirayut | | 24-Feb-26 | Chief Executive Officer (Biochemical Division) | | Ceased to be the CEO (Biochemical Division) following the appointment of Mr. Na Muangtoun. He remains as an executive director |
| Rounroengrom Surasak | 15-Sep-14 | 23-Feb-24 | INED | | No reasons provided |
| Chearavanont Soopakij | | 23-Feb-24 | ChNC | | No reasons provided |
| Cheng Yuk Wo | | 23-Feb-24 | MbNC | | No reasons provided |
| Rounroengrom Surasak | | 23-Feb-24 | MbCC | | No reasons provided |
| Edward Ko Ming Tung | | 23-Feb-24 | MbCC | | No reasons provided |
| Ng Mon Mei Wah | 16-Nov-15 | 31-Aug-22 | CoSec | | |
| Ng Mei Wah | | 31-Aug-22 | CoSec | | No reasons provided. |
| Yao Minpu | 15-Sep-14 | 11-Dec-18 | ED | | |
| Lau Kevin Wing Yuen | 31-Aug-22 | 26-Jul-17 | CoSec | | |
| Man Karen Sau Ying | 15-Sep-14 | 16-Nov-15 | CoSec | | |
| Ikezoe Yoichi | 23-Oct-15 | 01-May-10 | Non-Executive Director | | |
| Ko Edward Ming Tung | 15-Sep-14 | 11-Sep-07 | INED | | |
| Na Muangtoun Chawalit | 18-Feb-19 | 01-Jul-07 | ED | | |
| Chiaravanont Nopadol | 22-Jul-14 | 30-Sep-06 | ED | | |
| Cheng Erik Yuk Wo | 15-Sep-14 | 01-Sep-05 | INED | | |
| Cheung Katherine Marn Kay | 23-Feb-24 | 21-Apr-98 | INED | | |
