Global investment firm KKR has agreed to buy a majority stake in German payment processor Heidelpay, according to a company release. 

Heidelpay, which is majority owned by AnaCap Financial Partners, serves more than 30,000 retailers and marketplace operators, including SMEs and corporations. 

"We set out to become a market leader in onmichannel payment processing across the DACH region, and with AnaCap's powerful support we have reached our goal in a very short timeframe," Mirko Hullemann, founder and CEO of Heidelpay, said in the press release. "We are very excited to have attracted renowned global investor KKR to support us in our next stage of growth journey."

Hulleman and other managers will remain as long-term shareholders in the company, according to officials. 

KKR officials said they will continue to support Heidelpay's efforts to expand market share through organic growth and strategic mergers and acquisitions. 

Terms of the deal were not disclosed.