Michael Jackson is a twit.
The original question in in error - Lennon & McCartney were screwed by their music publisher, Dick James into selling their songs. Remember this was 1963, and nobody thought these songs would still be around nearly fifty years later. No songwriter today would sign a deal like that.
At any rate, the company the songs were "sold" to (Northern Songs) was on the London Stock Exchange, but the Beatles themselves owned large chunks of the stock. In 1969, Dick James was fed up with the band's seemingly 'druggy' lifestyle, and sold his majority interest to Lew Grade (ITV), without offering the shares to the band first. So they had no chance to purchase their own songs. Many years later, Grade sold the shares, and Jacko won the bidding war. No songs from other bands were involved. McCartney already owns lots of other people's songs, including Buddy Holly, and standards like "Autumn Leaves".
I wonder how all the Jacko fans would feel if the shoe was on the other foot, and McCartney owned "Billie Jean" and "Thriller"?
At any rate, Jacko sold most of his interest in the songs to Sony some years ago to finance his degenerate lifestyle.