In profit-making Pawan Hans Ltd, the government holds 51 per cent stake and the remaining shareholding is with oil behemoth ONGC.
Under the strategic disinvestment, the government would offload its entire 51 per cent stake in the company.
The civil aviation ministry official said employees' union of Pawan Hans wants to participate in the disinvestment and they would get some preferential treatment as per regulations.
Since the union is keen on participating in the process, the last date for submission of Expression of Interest has been extended to December 15. Earlier, the deadline was December 8, the official added.
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According to the official, employees can form a consortium to bid in the disinvestment process.
"Ownership of the consortium should be with the employees," the official noted.
Rohini heliport, located in the national capital, would not be part of the disinvestment process and it would be hived off into a special purpose vehicle.
The heliport would be hived off because it is in the land which belongs to the government.
"There will be a separate SPV which will be a mirror company of Pawan Hans," the official said, adding that in the SPV, the government would have 51 per cent stake and the rest would be with ONGC.
In October, the government had invited bids from private companies, including foreign ones, to buy out its entire 51 per cent stake along with management control in Pawan Hans.
The company maintains and operates more than 50 helicopters, according to its website.
A Miniratna PSU, Pawan Hans is under the administrative control of the civil aviation ministry.