About $150,000 of the $426,000 in donations received since Jan. 1 have come from California contributors, the Chicago Sun-Times reported.
More than 55 percent of the contributions have come from out of the state, documents filed this week with the Illinois State Board of Elections indicate.
The mayor's brother, Ari Emanuel, is a high-profile entertainment industry agent. He organized a fundraiser for his brother in California this year, which the mayor attended.
Ron Meyer, president and chief operating officer of NBCUniversal, and Robert Iger, chairman and chief executive officer of The Walt Disney Co., each gave $5,300, while former Disney CEO Michael Eisner donated $2,500.
The movie studio Lionsgate Entertainment contributed $10,500, the newspaper said.