Over three dozen firms including Alembic, Astec Lifesciences, Binani Ind, Century Enka, Coromandel International, Elgi Equipments, Equitas, Escorts, NIIT, NDTV, HeidelbergCement, India Cements, Karur Vysya Bank, LIC Housing Finance, L&T, NR Agarwal, Oriental Carbon, Ramky Infrastructure, SKF India, Subex, Tanla Solutions and Zuari Agro Chemicals will announce their April-June quarter numbers on Friday.