Unlisted shares of EV maker Ather Energy were trading at ₹321 apiece, a zero grey market premium (GMP) over the IPO issue price of ₹321, reports said on Saturday. The ₹2,981-crore IPO of Ather Energy, open from April 28 to April 30, was subscribed 1.5 times overall. Ather's listing will take place on both BSE and NSE on May 6.