Arctos Partners has acquired a minority stake in Monumental Sports & Entertainment (MSE), joining the ownership group behind the Washington Capitals, Wizards, and Mystics just as the Qatar Investment Authority (QIA) increases its own equity position. Terms of the transactions were not disclosed. 

MSE controls five D.C.-based professional franchises and operates Capital One Arena, which is undergoing an $800 million renovation and entertainment district expansion in partnership with the city. 

“We’re proud to partner with Ted and the MSE team as they continue to elevate the fan experience, invest in the community, and build long-term value across a world-class platform,” said Doc O’Connor, co-founder and managing partner at Arctos. The firm is the only private investor approved to hold equity across all five major North American leagues (NFL, NBA, MLB, NHL, MLS) and has stakes in more than 25 franchises globally. 

QIA CEO Mohammed Saif Al-Sowaidi said the sovereign fund’s increased commitment reflects its focus on “long-term, high-growth investments” and confidence in MSE’s vision. QIA, which first invested in MSE in 2023, also owns the nearby CityCenterDC development. 

Arctos has remained active across the sports landscape, recently launching a capital markets arm for high-net-worth investors and partnering with Prospector Baseball Group in the minor leagues. The firm also added Thad Sheely, currently advising the Washington Commanders on their stadium search, and former LA2028 executive Brian Lafemina to its leadership team.