Macquarie Group Limited (ASX:MQG) and Mitsubishi are set to submit a joint bid for RBS Aviation according to the Dow Jones Newswires.
Final bids are due for the aircraft leasing business being sold by the Royal Bank of Scotland.
The auction is being run by Goldman Sachs, valuing the business at between $US6 billion and $US8 billion.
RBS is expected to decide who it will sell the business to early next year.
In the six months to September 30, 2011 Macquarie Group reported a net profit of $308 million.