The 71-year-old Clifford was jailed in May on an eight-year sentence. MCA shutters with debt of about $750K and assets of $20K.
Clifford faces lawsuits, which could result in the sell-off of his three properties in Surrey and Spain, worth a combined $15M.
One suit seeks compensation of $2.4M. More are in the works.
Clifford and daughter Louise are sole shareholders of MCA. He had hoped MCA would continue under the leadership of his 43-year-old daughter, but she launched her own firm.
Clifford claimed that while a press officer at EMI in the early 1960s he helped launch The Beatles.
During his heyday, he represented Frank Sinatra, Muhammad Ali, Marlon Brando and Marvin Gaye.