Saijai Wangpattanasirikul

Part of Siam City Cement Public Co., Ltd., Conwood Co., Ltd. offers Conwood Innovation products for interior and exterior home decorating ideas. The company is based in Bangkok, Thailand. The Thai company's products are designed to meet all ideas for a more decorative timber and offer a fully equipped home. Conwood Co. was acquired by Siam City Cement Public Co., Ltd. on March 05, 2002.

General Motors (Thailand) Ltd. manufactures motor vehicles. It assembles commercial and passenger vehicles. The firms brands include Buick, Cadillac, Chevrolet, GMC, Hummer, Holden, Oldsmobile, Opel, Pontiac, Saturn, Saab and Vauxhall. The firm was founded in 1997 and is headquartered in Bangkok, Thailand.

Part of Holcim Ltd., Holcim Group Support Ltd. is a world leader in innovative and sustainable building solutions. The company is based in Zurich, Switzerland. The Swiss company strives for superior environmental, social, and governance (ESG) performance and is at the forefront of decarbonizing building end-to-end. Holcim has four business lines of high-quality and innovative building materials, including cement, ready-mix concrete, aggregates, solutions, and products.

Part of Siam City Cement Public Co., Ltd., Insee Super Block Co. Ltd. is a Thai company that manufactures lightweight blocks. The company is based in Bangkok, Thailand.

Insee Digital Co. Ltd. is a Thai company that provides IT and digital services. Ittaya Sirivasukarn has been the CEO of the private company since 2015.