R2i said the undisclosed amount of equity capital would be used to accelerate growth and make digital and social media acquisitions in the US and worldwide.
ORIX Private Equity senior managing director Chris Smith said, “We researched many companies in the digital marketing space.
“R2i stood out for its accomplished management team, industry thought leadership and market presence as a pre-eminent independent digital agency.
“We chose to invest with r2i in its continued pursuit of its growth strategies.”
ORIX PE targets minority investments in mid-market companies seeking between $5m and $25m of equity capital.
The arm is a business unit of ORIX USA, which has about $6bn of assets and manages another $25bn.
That company is a subsidiary of Tokyo-based financial services company ORIX Corp, which is listed on the Tokyo and New York stock exchanges.
According to Reuters, Orix and Macquarie both bid for the whole of the asset manager in a deal which could fetch as much as €2bn.
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