 COLUMBUS, Ohio, Aug. 24, 2021 PRNewswire -- Horizon , a fiber-optic broadband company based in Columbus, Ohio, announces today that it and its shareholders have entered into an agreement with GCM Grosvenor NASDAQ: GCMG, a leading global alternative asset management solutions provider, to acquire a significant ownership stake of the company. GCM Grosvenor will invest through its Labor Impact Strategy and joins the existing investor group led by Novacap TMT , one of Canadas leading private equity firms. 