The Canada Pension Plan Investment Board (CPPIB), a state-owned pension fund, is seeking to buy part of a stake in Gatwick airport that could be worth more than 3 billion pounds ($3.92 billion).

CPPIB is said to be part of a group of investors proposing to buy out U.S. infrastructure investment fund Global Infrastructure Partner (GIP)'s 42 percent stake in the second-busiest airport in Britain.

The Canadian pension fund would invest hundreds of millions of pounds in the airport if the deal gets finalized.

GIP owns 42 percent of Gatwick but is expected to retain a management contract even after it sells most or all of its direct equity stake.