Def Jam Recordings was created in 1984.

Def Jam recordings is worth $1.2 billion dollars. Def Jam is a hip hop record label that was founded by Rick Rubin.

The Island Def Jam Music Group is owned by the Universal Music Group, who is in turn owned by the French, mass media conglomerate, Vivendi. "Island Def Jam" was formed in 1999 when Universal Music Group merged the Island Records and Def Jam Recordings labels.

Def Jam records is comprised of Island Records and Def Jam Recordings. They have artists including Mariah Carey, Bon Jovi and Lionel Richie. They started in 1984 and sign an average of 7-8 artists a year.