Chief Executive Chanin Vongkusolkit said the company expect to complete its  tender offer for the remaining 80.1% of Centennial by the end of September or early October at the cost of A$2.017 billion or 55.29 billion baht. Banpu earlier acquired 19.9% of Centennial for A$380 million. On July 5, Banpu announced it would buy all of the ordinary shares of the Australian company it does not already control at the price of A$6.2 per share. Centennial, with 10 mines, has marketable coal reserves of 386 million mt as of June 30 this year. Banpu, which operates coal mines in Indonesia and China, has reserves of 318 million mt.