Origin of Name
The name originates from Jet Records, a small British record label founded in 1974 by Don Arden.
In 1991, Bagdasarian Productions bought the label and renamed it Chipmunk Records.
Alvin and the Chipmunks
In the film, the company is one of the two locations at which Dave is currently employed and is the building where The Chipmunks arrive at in their tree after it was cut down to be displayed for Christmas.
JETT Records becomes The Chipmunks' official record label after "The Chipmunk Song" becomes a hit.
By the end of the film, Ian is removed as an executive in the company after he loses everything that he invested in The Chipmunks.
Alvin and the Chipmunks: The Squeakquel
In the film, Ian doesn't leave the company, even after being removed from it. He is seen below the building making coffee and eating a muffin from the garbage shoot. Later, Ian brushes his teeth next to the fountain in front of the building where The Chipettes find him, excited that they finally made it to JETT Records.
After The Chipettes sing in Ian's "penthouse office," he offers to be their manager and they happily accept, even though he is no longer connected to the company.
Near the climax, when the girls find out Ian had lied to them about everything, they decided to go with Alvin (who had arrived to save them) on his motorcycle instead. As well, Brittany teasingly shouts out to Ian as they drive by Ian's limousine, "Hey, Ian! In the words of the Donald, you're fired!," to which Ian responds with an angry, "AAAALLLLVIIIIIIN!!!"
Alvin and the Chipmunks: Chipwrecked
Although the company isn't seen in the film, it's mentioned by Ian as he, Dave, Zoe, The Chipmunks, and The Chipettes call out to the rescue helicopter while on the raft.