African payment giant backed by SoftBank is sprinting towards U.S. stocks! Opay (OPAY.US) plans to raise $336 million, with a valuation possibly exceeding $4 billion.

According to Jinse Finance, Opay Ltd., a payment platform focused on the Nigerian market, plans to raise up to $336 million through an initial public offering (IPO). According to documents filed with the U.S. Securities and Exchange Commission (SEC) on Friday, Opay plans to issue 16 million American Depositary Receipts (ADR) at a price of $19 to $21 per share. Each ADR represents 10 Opay ordinary shares. Based on the midpoint of the offering price range and the number of outstanding ordinary shares listed in the documents, Opay's market value could exceed $4 billion. The company expects its ADRs to be listed on the New York Stock Exchange under the ticker symbol "OPAY."