Cedars-Sinai Medical Center spokeswoman Simi Singer says John Atterberry died Monday.
The 40-year-old executive, who's worked with the Spice Girls, Jessica Simpson and others, was shot in the face and upper body as he drove his Mercedes-Benz during Friday's random attack.
He was the only seriously injured victim of 26-year-old Tyler Brehm, who police say fired nearly 20 bullets in the air and at cars as he screamed that he wanted to die. He was killed by police minutes later.
