The BSE Sensex index has seen a significant shift, with legacy companies making way for modern businesses. The number of Central Public Sector Undertakings (CPSUs) has increased, and independent companies now hold a larger share. While the Tata group has maintained its presence, Reliance Industries, Adani, Bajaj, and Bharti groups have seen substantial growth. Conversely, historical business groups like Birla, Goenka, Thapar, and Wadia have lost their index representation.