Vodafone Idea Ltd. emerged as the top gainer in the BSE's 'A' group on January 1, 2026, surging 9.48% to Rs 11.78. Other notable gainers included Adani Total Gas Ltd., Transformers Rectifiers India Ltd., Sunteck Realty Ltd., and Adani Power Ltd., with significant percentage increases. Trading volumes for Vodafone Idea and Adani Total Gas saw substantial spikes compared to their monthly averages.