BHEL tied up with Horizon Fuel Cell for hydrogen-based rolling stock, while Aurobindo Pharma and Zydus Lifesciences reported FDA observations. PNB Housing cleared a ₹5,000 crore NCD issue, SpiceJet posted a Q1 loss, Vedanta led bids for Jaiprakash Associates, and Adani Power announced a Bhutan hydro project. Auto firms like Tata Motors, M&M rolled out GST-linked price cuts, and Aegis Logistics plans capacity expansion at Mumbai Port. Here are the key stocks to watch before Monday’s trading session.