Swee Kim Toh

Part of Ley Choon Group Holdings Ltd., Chin Kuan Engineering & Contractors Pte Ltd. provides road and sewer construction. The private company is based in Singapore, Singapore.

Zheng Choon Holding Pte Ltd. operates as investment holding company. The company is headquartered in Singapore.

Ultro Technologies Ltd. engages in the sourcing, supplying, trading, and distribution of natural resources and minerals. The company used to manufacture and distribute electronics but now focuses on its business venture such as its Indonesian thermal coal trading and mining venture. The company was founded by Lim Ee Chuan on February 6, 1987 and is headquartered in Singapore

Part of Ley Choon Group Holdings Ltd., Ley Choon Constructions & Engineering Pte Ltd. provides construction and maintenance, pipeline rehabilitation, and waste recycling services. The private company is based in Singapore, Singapore. Ley Choon Constructions & Engineering was acquired by Ultro Technologies Ltd. on July 25, 2012 for $78.96 million.