CoStar Group announces new public offering by Brian Blum in Real Estate 26 Sep 2017 CoStar Group, which made the classified ad headlines earlier this month when it bought rival ForRent from Dominion Enterprises, yesterday announced it has commenced a public offering of $750 million U.S. of its common stock. This article is only available to AIM Group clients. Please subscribe now or log in to view. Share Costar GroupDominion Enterprisesforrentnasdaq Brian Blum Brian Blum covers the U.S., Canada and Israel for Classified Intelligence Report, and contributes to our special reports and research projects. Originally from San Francisco and now based in Jerusalem, he has been with the AIM Group since 2004. He is the president of Blum Interactive Media, specializing in writing and multimedia content development for online, print, video and audio. His clients include newspapers, universities and non-profits. He is currently working on a book about the billion-dollar bankruptcy of a once high-flying Israeli startup.