Operating under the same name but as an arm of Oppenheimer, the addition of Windham is designed to combine growth-oriented strategies with sound fundamentals.
"I am extremely excited about the future opportunities presented by our relationship with OFI Institutional," said Windham Chairman and CEO Neil McCarthy.
The team will be housed in shared offices at Two World Financial Center in New York.
Said OFI Institutional Asset Management President Chuck Mckenzie of the new relationship: "With Windham's solid long-term track record, their investment capabilities in domestic growth equities will fill a gap we had in our product line-up, continued McKenzie. You might say that they are the last piece of the puzzle."