Mumbai, May 25 -- Apollo Micro Systems Ltd, Enviro Infra Engineers Ltd, HFCL Ltd and Samhi Hotels Ltd are among the other gainers in the BSE's 'A' group today, 25 May 2026.Premier Explosives Ltd soared 20.00% to Rs 714.7 at 11:46 IST. The stock was the biggest gainer in the BSE's 'A' group. On the BSE, 2.84 lakh shares were traded on the counter so far as against the average daily volumes of 27356 shares in the past one month. Apollo Micro Systems Ltd surged 11.43% to Rs 395.7. The stock was the second biggest gainer in 'A' group. On the BSE, 42.03 lakh shares were traded on the counter so far as against the average daily volumes of 13.39 lakh shares in the past one month. Enviro Infra Engineers Ltd spiked 9.03% to Rs 204.1. The stock was...