PT Semen Indonesia (Persero) Tbk, previously named PT Semen Gresik (Persero) Tbk. Is a company engaged in the cement industry.Inaugurated in Gresik on August 7, 1957 by the first President of the Republic of Indonesia with an installed capacity of 250,000 tons of cement per year.

On July 8, 1991 the Company’s shares listed on the Jakarta Stock Exchange and Surabaya Stock Exchange (now Indonesia Stock Exchange) and is the first state-owned companies to go public by selling 40 million shares to the public. The composition of the shareholders at the time: State of RI 73% and 27% people.

In September 1995, the Company made a Rights Issue I (Right Issue I), which alter the composition of share ownership to the State of RI 65% and 35% people. On June 15 September 1995 by PT Semen Gresik consolidate with PT Semen Padang and PT Semen Tonasa. Total installed capacity of the Company at the time of 8.5 million tons of cement per year.

On September 17, 1998, the State of RI off its stake in the Company by 14% through an open offer, which was won by CEMEX S. A. de C. V., a global cement company based in Mexico. Shareholding composition changed to Republic of Indonesia 51%, the 35%, 14% and Cemex. Then on 30 September 1999 shareholding changed to: The Government of the Republic of Indonesia 51.0%, 23.4% and the 25.5% Cemex.

On July 27, 2006, there was the sale of shares of Cemex Asia Holdings Ltd.. to Blue Valley Holdings PTE Ltd.. so the shareholding composition changed to 51.0% RI State Blue Valley Holdings PTE Ltd.. 24.9%, 24.0%, and the community. In late March 2010, Blue Valley Holdings PTELtd, sold all of its shares through a private placement, so the composition of the shareholders of the Company changed to 51.0% Government 48.9% and the public.

In April 2012, the Company successfully completed the construction of Tuban IV plant with a capacity of 2.5 million tons. After commissioning, in July 2012 the new factory was handed over, followed by the inauguration of commercial operations in October 2012. Furthermore, in the third quarter of 2012, the Company also successfully completed the construction of the Tonasa V cement plant in Sulawesi. The new plant, with a capacity of 2.5 million tons, is commissioning since September 2012, and is targeted to start commercial operations in the first quarter of 2013.
On December 18, 2012 the Company officially acquired 70% of Than Long Cement Joint Stock Company (TLCC) from Hanoi General Export-Import Joint Stock Company (Geleximco) in Vietnam, with a capacity of 2.3 million tons. This corporate action made the Company the first Multinational SOE listed in Indonesia.
On 20 December 2012 the Company officially acts as a Strategic Holding Company and changed it’s name from PT Semen Gresik (Persero) Tbk to PT Semen Indonesia (Persero) Tbk.