Vivo Energy Plc., the downstream joint venture of Vitol and Helios Investment Partners, launched its initial public offering on the London Stock Exchange Friday with a valuation of roughly 2 billion (U.S. $2.71 billion). This marks the largest Africa-focused London IPO in over a decade, according to a Reuters article. The joint venture partners each cut their stakes of the company to offer almost 30 percent of the company in the IPO. Vivo sells Shell-branded lubricants and fuels across 15 African countries.