Atlantic Nickel reports continued first quartile cost performance in Q1 2021; upgrades and adds another 20% to the declared Underground Mineral Resource Q1 2021 operational highlights In the 6 th consecutive quarter of operation since restarting in Q4 2019, Atlantic Nickel produced 26kdmt of concentrate with 3.6kt of contained nickel and 1.1kt of contained copper, among other by-products Net revenues of US$63m achieved over the first 3 shipments of the year at an average realized nickel price of US$7.85/lb First quartile C1 and AISC cost performance of US$3.05/lb Ni and US$4.78/lb Ni, respectively, net of by-product credits Active COVID cases at site remain low and well-managed, supporting continuity of operations throughout the quarter