However , they come in at the ninth position in the richest list .
Raj Kumar and Kishin RK - Father - son duo Raj Kumar and Kishin RK have combined assets of USD2. 6 billion coming out top among the Indian - origin businessmen in Singapore .
Businessmen come in at the ninth position in the richest list .
Raj Kumar and Kishin RK - Father - son duo Raj Kumar and Kishin RK have combined assets of USD2. 6 billion coming out top among the Indian - origin businessmen in Singapore .