Africa-focused private investment firm Helios Investment Partners and Netherlands-based energy trader The Vitol Group have agreed to acquire a 60 percent stake and 51 percent of the voting rights in the downstream business of Oando, a Nigeria-based oil and gas company, for US$276 million. The new downstream and retail business will be established as a standalone, independent company led by a local management team. The transaction is subject to the receipt of regulatory approvals and customary purchase price adjustments, including working capital. Separately, Helios has sold a 2.4 percent stake in Equity Group Holdings, a Kenya-based financial services company, to the National Social Security Fund of Uganda. The transaction was structured through Helios EB Investors II. In a separate transaction, Helios, alongside emerging markets asset management firm The Rohatyn Group and Sub-Saharan Africa-focused private equity firm RMB Corvest, has completed the sale of Continental Outdoor Media, a South Africa-based outdoor advertising company, to global advertising company JCDecaux.  Financial details of the two exits were not disclosed.