Money Dan Gilbert’s Rocket Companies IPO raises $1.8 billion, launches trading on Wall Street August 6, 2020 Susan Tompor, Detroit Free Press Comments Off on Dan Gilbert’s Rocket Companies IPO raises $1.8 billion, launches trading on Wall Street The IPO for Rocket Companies, the parent of Detroit-based Quicken Loans, was fueled by a super hot mortgage market and the popularity of IPOs.