(Bloomberg) -- Arctos Partners LP is buying a minority stake in Paris Saint-Germain, the football club home to superstar Kylian Mbappe, in a deal that shows American investors are continuing to bet on the valuation of European sports teams.

Paris Saint-Germain’s Qatari owners have agreed to sell a 12.5% minority stake to Arctos at a valuation of about €4 billion ($4.3 billion), people familiar with the matter told Bloomberg. That’s a steep increase from 2011, when Qatar Sports Investments bought a 70% stake for €70 million. 

PSG said in a statement on Thursday that the arrival of the new shareholder would help the club fund its international presence, including in the US. 

Read More: The Great Billionaire Takeover of Europe’s Football Giants

The club has grown into an international brand under Qatari ownership, replete with a 4,400 square-foot (409 square-meter) store on Fifth Avenue.

PSG spent heavily on costly stars like Neymar and Lionel Messi that raised its profile, although it has so far failed to win a European Champions League title, its main sporting target.

The Arctos investment will also help the club fund investment in its infrastructure, such as upgrading its stadium and building a new training ground, PSG said. The club has been looking to renovate and expand the Parc des Princes, which is currently the subject of a fight with the city of Paris authorities.

Arctos also has a stake in the Boston Red Sox and Liverpool Football Club owner Fenway Sports Group, and recently bought a minority stake in the Aston Martin team.

Qatar Sports Investments has also expanded its portfolio of sports investments. It recently bought a minority stake in Portugal’s SC Braga, and is the owner of the Premier Padel professional tour.

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--With assistance from David Hellier.

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