And Aon, a Chicago-based global financial services company, are understood to have won the race to have their logo on United's shirts from the start of the 2010-11 season.
Related ArticlesD-Day for Tevez?Liverpool lose ground in race for TevezPremier League Transfer TalkSport on televisionManchester United will keep disgraced AIG logo on their shirtsManchester United look to Indias Sahara Group as potential shirt sponsorsIt is understood that the deal could be worth £20 million a year for the Premier League champions.
Despite AIG's announcement earlier this year that they would not be renewing their deal with United, the company will continue to have its name on the club's shirts next season.
Shirt manufacturers Nike have already produced next season's United kit, which is due to be unveiled on the club's Far East tour next month, and the prohibitive cost of pulping more than a million shirts in order to sport a new logo has ensured that Sir Alex Ferguson's players will continue to wear AIG on their jerseys next term.
A number of companies have been linked with the United shirt deal, including Indian firms Sahara and TATA, plus electronics giant Samsung and Saudi Telecom.
But Aon now appear to have moved into pole position to claim one of the most prestigious advertising deals in world sport.
BIGGEST SHIRT DEALS
Manchester United's £80m shirt deal outstrips the sponsorship packages agreed by their Premier League and European rivals.
Bayern Munich - £17m-a-year, four-year deal with telecommunications company T-Home.
Real Madrid - £15m-a-year, four-year deal with Austrian gambling company Bwin.com.
Juventus - £15m-a-year, five-year deal with Libya-based oil company Tamoil.
Chelsea - £10m-a-year, five-year deal with Korean electronics giant Samsung.
Liverpool - £8m-a-year, four-year deal with Carlsberg.
Manchester City - £8m-a-year, three-year deal with Etihad Airways.
Barcelona - European champions donate £1.5m-a-year to Unicef in order to wear the charity's logo.