Vantiv, based in Cincinnati, Ohio, will pay 3.97 pounds a share in cash, stock and dividends for Worldpay, 24 percent more than the closing price on July 3, when news of the talks became public.
Paysafe Group last week was agreed to be bought by Blackstone Group and CVC Capital Partners for $3.9 billion, while several buyout firms are considering bids for Danish payment-services company Nets A/S.
"The growth of e-commerce and the way consumers expect to transact is increasing complexity for businesses around the world," said Philip Jansen, chief executive officer of Worldpay, in a statement.
"Our unique combination of scale, innovation, technology, and global presence will mean that we can offer more payment solutions to businesses, whether large or small, global or local, enabling them to meet consumers' increasing demands and helping them prosper."
The takeover will combine Vantiv's U.S.-focused business with WorldPay's operations around the world.
- Worldpay seals £9bn merger with US rival VantivBBC News
- US card firm Vantiv clinches $10 billion deal to buy WorldpayYahoo Finance
- For Worldpay, Everything Must GrowBloomberg
- Vantiv Agrees to Purchase Worldpay Group for $10.4 BillionBloomberg
- Vantiv and Worldpay Just Agreed Terms for Their $10 Billion MergerFortune
- Vantiv seals $10.4 billion merger with WorldpayCNBC
- US jobs most at risk as Worldpay agrees £9.3bn tie-up with VantivTelegraph.co.uk
- Vantiv Agrees Terms for $12.1 Billion Takeover of Britain's Worldpay GroupTheStreet.com
- Vantiv seals $10 billion Worldpay acquisitionMarketWatch
