Sree Valliappa Investments Private Limited · Sona Synthetics Private Limited · Karpaga Vinayaga Textiles Private Limited · Sona Vana Textiles Private Limited · Spinwell Valliappa Private Limited · Shree Raajarajeshweri Industries Private Limited · Valliappa Software Technological Park Private Limited · Chockalingam Foundation · Karpagam Foundation · Sona Incubation Foundation