do Tambangraya Megah was established in 1987 as a Limited Liability Company [or PT/Perseroan Terbatas] and in 2007 was acquired by Banpu Group Thailand and then in the month of December 2007 became a public company. Banpu, through PT Centralink Wisesa International, owns 77.60% of shares. PT Sigma Buana Cemerlang, 2.40% shares and the remaining shares are owned by the public.
In 2008, PT Centralink Wisesa International transferred 73.72% of its shares to Banpu Minerals (Singapore) Pte. Ltd. thus making public shares amount to 26.28%. In 2010, Banpu Minerals (Singapore) Pte. Ltd. sold 8.72% of its shares to the public and thus maintained majority ownership of 65% where the remainder was owned by the public in which, individually, had shares of less than 5%.