Reliance Industries' (RIL) subsidiary Nauyaan Tradings Pvt Ltd has acquired a 74% stake in Nauyaan Shipyard Pvt Ltd (NSPL) for ₹382.73 crore from Welspun Corp Ltd, an exchange filing on Friday stated. It highlighted that the acquisition makes NSPL a step-down subsidiary of RIL. NTPL had previously extended an unsecured loan of ₹93.66 crore to NSPL, the exchange filing added.