Michael Jackson bought ATV, which owns the Beatles catalog, in 1985, and 10 years later, merged with Sony, creating Sony/ATV Music Publishing. Jackson and Sony co-owned the Beatles catalog. Following Jackson's death, Sony/ATV keeps control of the Beatles' songs.
It's not every Beatles song and they only have the publishing rights.
The (mechanical) rights to the Beatles recordings are totally separate and Sony/ATV has no control over these.
http://en.wikipedia.org/wiki/Northern_Songs