The Numaligarh Refinery, located at Morangi, Golaghat district, Assam in India. Numaligarh Refinery Limited (NRL) is a Government of India Enterprise, it is a group company of Oil India Limited (earlier subsidiary of BPCL) and the present shareholding pattern of NRL is OIL-80.16%, Govt. of Assam (GoA)-15.47% and Engineers India Ltd (EIL) – 4.37%. NRL is a Category-I Mini Ratna PSU and it is one of 4 refineries in Assam. The other 3 refineries in Assam are owned by M/s IOCL. It opened in 1999. The commercial production commenced from 1st October, 2000.