A Mint analysis of India's top business groups in 2025 reveals a significant divergence in performance. Despite foreign investment outflows and a weakening rupee, some conglomerates significantly outperformed benchmark indices, creating substantial shareholder wealth. The Aditya Birla Group led this performance, with its market capitalization jumping 26.2%, driven by strong gains in companies like Vodafone Idea and Aditya Birla Capital. However, the top 10 corporate groups collectively saw more modest growth, with two experiencing valuation declines.