US card payment processing giant Vantiv

US card payment processing giant Vantiv has agreed to purchase Worldpay in a deal which values its British peer at £9.3 billion ($12.1 billion, 10.3 billion euros), the pair said Wednesday.
The announcement, which came after the two companies announced an initial agreement last month, will see Vantiv shareholders own a majority 57 percent of the combined group, they said in a statement. Worldpay investors will hold the remaining 43 percent.