PT Timah Tbk is a holding company, which engages in the business of mining, industrial, trading, transportation, and services related to mining business. It operates through the following segments: Tin Mining, Coal Mining, Construction, Industrial, and Other. The Tin Mining segment includes tin mining and smelting. The Coal Mining segment primarily focuses on the operation of TAJ which is involved in coal mining and trading. The Construction segment includes the company subsidiaries and DAK, which involves workshop, construction, and shipping dockyard services. The Industrial segment relates to the tin chemical and tin solder production. The Other segment are primarily from the trading of real estate, nickel sales, and reclamation services. The company was founded on August 2, 1976 and is headquartered in Pangkal Pinang, Indonesia.