Investing.com -- Global Payments (NYSE: GPN ) stock rose 5.5% following reports that activist hedge fund Elliott Management has built a "sizeable" stake in the payment processing company.

The investment comes as the Atlanta-based payments group navigates investor concerns after its $24.2 billion acquisition of Worldpay earlier this year, according to the Financial Times, citing unidentified people familiar with the matter. The deal, which involved private equity group GTCR and financial technology company Fidelity Information Services (NASDAQ: III ), reportedly sent Global Payments shares to a 10-year low.

The specific demands from Elliott Management and the exact size of its stake in Global Payments have not been disclosed, according to the report.

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