Registered as a Company Limited: January 15, 1952
Listed in The Stock Exchange of Thailand: June 30, 1978
Registered as a Public Company Limited: May 9, 1994
Auditor: Mr. Wichart Lokatekrawee EY OFFICE LIMITED and/or Mrs. Saifon Inkaew EY OFFICE LIMITED and/or Miss Kamontip Lertwitworatep EY OFFICE LIMITED