Paris Saint-Germain have announced that American private equity firm Arctos Partners have purchased a minority stake in the club.
Back in August, it was reported that Arctos had positioned themselves at the head of the queue to buy a stake in PSG, with the aim of helping to end years of Champions League disappointment.
The American investors already possess a share in Liverpool's owners Fenway Sports Group and paid £29.2m to purchase a stake in Serie A giants Atalanta BC last year, while they are also involved with a plethora of MLB, NBA, MLS, NHL and Formula One franchises.
A statement from PSG announced that the "minority common equity stake" marked a "landmark strategic partnership", but Qatar Sports Investments - who have owned PSG since 2011 - will retain full control over all sporting decisions.
"We are delighted to welcome Arctos into the Paris Saint-Germain family as a strategic partner and investor," PSG president and QSI chairman Nasser Al-Khelaifi told the club's website.
"As a Club and institution, we are entering the next exciting phase of PSG's growth and development, both on and off the pitch – which is based on long-term ambitions and attaining excellence in everything we do.
"Arctos is a fantastic partner to help us achieve our goals, bringing strategic expertise, ideas and innovation to our business, while providing investment and new relationships to support our footballing and sporting goals.
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"From day one, they have passionately believed in our project, our plan and vision for the Club – and we are proud to have them as part of our family. Today is an important milestone in Paris Saint Germain's history, which will contribute greatly to the continued success and growth of our great Club."
Doc O'Connor, who serves as the Co-Founder and Managing Partner of Arctos Partners, added: "SI has transformed Paris Saint-Germain into one of the most renowned and successful football clubs in the world, building both a global brand and one of the most engaged fan communities in the world.
"Today, PSG is an iconic sports institution with a proud history and a regular contender for leading honors in domestic and European competitions. The first time we visited the Club, we felt the magic of PSG and its deep connection to the city of Paris.
"Our investment in the Club fully aligns with our strategy of partnering with best-in-class teams across North America and Europe. We are excited to be joining the PSG family and look forward to working together with President Nasser Al-Khelaifi to maximise the Club's potential, providing strategic expertise and investment to drive the next phase of development, growth and success of this great institution."
Arctos' stake is believed to be 12.5%, which now values the perennial French champions at €4.25bn (£3.7m), up from the €3.9bn (£3.4bn) estimated by Forbes at the end of the 2022-23 season.
PSG have won 30 major honours since QSI assumed full control of the club in 2011, but they are still waiting for their inaugural Champions League title and sit second in Group F heading into their final game against Borussia Dortmund next week.
Prior to their trip to the Westfalenstadion, Luis Enrique's team welcome Nantes to the Parc des Princes for Saturday's Ligue 1 fixture, aiming to maintain or increase their four-point lead over Nice at the top of the table.