Mumbai, Aug. 11 -- Aarti Pharmalabs Ltd, Chennai Petroleum Corporation Ltd, Sundram Fasteners Ltd and Gland Pharma Ltd are among the other gainers in the BSE's 'A' group today, 11 August 2026.Lumax Auto Technologies Ltd spiked 18.23% to Rs 2058.1 at 11:45 IST. The stock was the biggest gainer in the BSE's 'A' group. On the BSE, 3.49 lakh shares were traded on the counter so far as against the average daily volumes of 7809 shares in the past one month. Aarti Pharmalabs Ltd surged 12.48% to Rs 924. The stock was the second biggest gainer in 'A' group. On the BSE, 7.46 lakh shares were traded on the counter so far as against the average daily volumes of 15659 shares in the past one month. Chennai Petroleum Corporation Ltd soared 10.91% to Rs...