Radius | Global Growth Experts | 11,336 followers on LinkedIn. Radius was acquired by VISTRA | Radius was acquired by VISTRA and has been re-branded to VISTRA International Expansion. Radius helps companies expand and win globally. Clients from startups to larger multinationals take advantage of Radius’ international accounting, finance, banking, tax, HR, legal and compliance support to simplify their core operations, reduce their risk exposure and improve the management and control of their overseas businesses.