Southern Petrochemical Industries Corporation Limited · Tamil Nadu State Transport Corporation Coimbatore Limited · Tamilnadu Industrial Development Corporation Limited · Southern Structurals Limited · Tamil Nadu Water Investment Company Limited · Tamilnadu Transmission Corporation Limited · Tidel Park Coimbatore Limited · Tidel Park Limited · Tamil Nadu Road Infrastructure Development Corporation · Tamilnadu Forest Plantation Corporation Limited · Tamilnadu Polymer Industries Park Limited · Ticel Bio Park Limited · Tamil Nadu Telecommunication Limited · Tamilnadu Handloom Development Corporation Limited · Small Industries Product Promotion Organisation