PT Semen Indonesia (Persero) Tbk is a leading Indonesian multinational company specializing in the production and distribution of cement and building materials. Established in 1953 and based in Jakarta, the company operates through two principal segments: cement production and non-cement production. Its core business focuses on manufacturing, packaging, and supplying cement for diverse uses, ranging from property development to major infrastructure projects, serving both domestic and international markets, including regions in Asia and Oceania.

Beyond cement, PT Semen Indonesia is active in industries such as limestone and clay mining, manufacturing of packaging materials, ready-mix concrete, aggregates, industrial real estate, as well as logistics and information systems support. The company manages an extensive supply chain, operating packaging factories, distribution networks, and ports throughout Indonesia and Vietnam.

Notably, the company is state-owned, with the Indonesian government holding a controlling stake. Through its 17 subsidiaries, PT Semen Indonesia plays a crucial role in supporting both the national construction sector and broader regional development, particularly in public works, housing, and industrial infrastructure.