Record label mogul Allen Klein who once represented and both fell in and out of favor with the Beatles and the Rolling Stones, died after a battle with Alzheimer's disease at the age of 77.

Klein's ABKCO Music & Records is one of the largest independent labels in the industry. According to company publicist Bob Merlis, the company would remain controlled by family, with his son Jody retaining his post as head of ABKCO.

ABKCO's music publishing division holds over 2,000 copyrights, including songs by musical greats including Pete Townshend, Ray Davies, Mick Jagger, Keith Richards, and Bobby Womack, amongst many others.

Throughout Klein's over 50-year career in the music business he developed a reputation for bulldozing his way through deals. He represented both the Rolling Stones and the Beatles in arrangements that eventually spun out into lawsuits.

Klein also represented the Beatles in their final months before the band's break up in 1970. He helped the group secure re-negotiations between Apple Corps. Ltd. and EMI in 1969, which landed what was at the time the largest ever royalty rate paid out to an artist.

However, Klein also played a key role in the Fab Four's demise. A disagreement amongst the group over bringing Klein onboard eventually led to a court battle just prior to their break-up. Nevertheless, once the band split, Klein continued to work with John Lennon and his wife, Yoko Ono.

Klein also tried to gain control of copyrights for the Beatles, however Michael Jackson eventually secured the lucrative rights in a massive $47.5 million deal in 1985.

Klein's relationship with the Rolling Stones also eventually came to an end. However, he retained the rights to some of the group's biggest hits, such as "(I Can't Get No) Satisfaction" and "Jumpin' Jack Flash."

Klein also co-produced "The Concert for Bangladesh" with George Harrison, and produced a handful of films including "The Greek Tycoon", "El Topo" and "Holy Mountain."

Even though he was convicted of tax fraud in 1979 for not reporting income from the sales of several promotional records, and serving two months in prison, his success did not falter and did not take a hit.

Klein is survived by longtime companion Iris Keitel, his wife Betty, three children, four grandchildren, and a sister. Funeral services will be held in New York on Thursday at the Riverside Memorial Chapel, far away from the Michael Jackson circus/memorial taking place on the country's West Coast.