Indigo Star Holdings Limited, an investment holding company, operates as a subcontractor for structural reinforced and concrete works in Singapore. The company undertakes reinforced concrete works, including steel reinforced, formwork erection, and concrete works of general building and civil engineering projects. It undertakes general building projects, such as construction of hotels, hospitals, mixed development, and court buildings; and civil engineering works comprising construction of MRT stations. The company was founded in 1996 and is headquartered in Singapore. Indigo Star Holdings Limited is a subsidiary of Amber Capital Holdings Limited.