The consultancy arm of Coal India, Central Mine Planning and Design Institute (CMPDI), will open its IPO on March 20. The offer for sale of 10.71 crore shares will list on BSE and NSE, with 50% reserved for QIBs and 35% for retail investors. As the issue is entirely an OFS, CMPDI will not receive any proceeds from the offer, and the funds raised will go to the selling shareholders.