AirAsia X would sell 790.12 million shares in the initial public offering (IPO) with listing scheduled for July 10 on Bursa Malaysia, a source familiar with the deal told AFP on condition of anonymity.
The funds are expected to be used for a mixture of activities including capital expenditure and repayment of loans.
Fernandes, who declined to reveal details of the IPO due to regulatory compliance, told AFP that a roadshow to promote his airline business would start in the second week of June with retail investors being his primary target.
"I will go on the road to meet retail investors," he added.
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The listing comes as Fernandes tries to tap the Kuala Lumpur exchange's popularity as a centre to launch initial public offerings.
Shukor Yusof, an aviation analyst with Standard and Poor's Equity Research in Singapore said the AirAsia X listing would be a success.
"It is doable. With Tony at the helm it lends credibility to the IPO. The financial market is conducive and there is an appetite for shares in a low cost carrier especially one with a proven track record like AirAsia, despite the global economic turbulence," he told AFP.
Fernandes has previously announced plans to list AirAsia's Indonesian unit and Tune Insurance in a bid to raise funds to expand in a bigger marketplace.
Tune Group is owned by Fernandes and his deputy Kamarudin Meranum who are founders of AirAsia, the region's largest budget carrier.
Meanwhile Dow Jones Newswires said the planned offering by AirAsia X kickstarts the IPO momentum in Malaysia that saw deals worth about USD 4 billion held back due to elections in the country earlier this month.