The Department of Disinvestment has invited bids from merchant bankers who would advise it in selling 29.54 per cent stake in the company, sources said.
The merchant bankers would have to suggest the timing of the open auction, conduct market survey and ensure best return to the government, they added.
Last month, the Cabinet had cleared the stake sale in HZL through auction route.
The Prime Minister and the Attorney General were both of the view that the residual stake in HZL should be sold through through an open auction.
During 2001-03, the government had sold majority stakes in the erstwhile PSU to the Vedanta group. At present, London-listed Vedanta holds 64.92 per cent stake in HZL.
Last October, shareholders of Vedanta gave their nod to raise offers for acquiring the remaining government stake in HZL.
After shareholders approval, Vedanta Board is now empowered to make an offer of up to Rs 21,636.56 crore for the remaining government stake in HZL.
