Foreign portfolio investors' (FPIs) stake in National Aluminium increased from 13.30% to 16.71% between January and June, while in Hindustan Aeronautics, their stake rose from 3.15% to 5.56%. In Oil India, FPIs increase their stake from 10.11% to 12.42%. Similarly, these investors increased their stake in RCF, BEML, Chennai Petro, Engineers India, Shipping Corporation, Bharat Dynamics, and Mazagon Dock, among others.