There are many white cement sack companies in the world. Some of the most popular ones are: 1. Cemex: Cemex is a Mexican multinational building materials company that manufactures, distributes, and sells cement, ready-mix concrete, aggregates, and other building materials in more than 50 countries. 2. HeidelbergCement: HeidelbergCement is a German multinational building materials company headquartered in Heidelberg, Germany. It is one of the world's largest global building materials companies with operations in around 60 countries. 3. LafargeHolcim: LafargeHolcim is a Swiss multinational building materials company headquartered in Zurich, Switzerland. It is the world's largest building materials company with operations in over 80 countries. 4. Anhui Conch Cement: Anhui Conch Cement is a Chinese company that manufactures and sells cement, clinker, and other building materials. It is the largest cement manufacturer in China with operations in over 20 provinces and regions. 5. Taiwan Cement: Taiwan Cement is a Taiwanese company that manufactures and sells cement, clinker, and other building materials. It is one of the largest cement manufacturers in Taiwan with operations in over 10 countries.