 Grupo Garnier, a Stagwell global affiliate, will rebrand office in 8 local markets, enhancing its service offerings to drive significant growth throughout the region NEW YORK, Sept. 30, 2021 PRNewswire -- Stagwell NASDAQ: STGW announced today a significant expansion of its creative, content, media, and marketing communications capabilities throughout Latin America following a new partnership between Stagwell agency AllisonPartners and Grupo Garnier. 