Oklahoma Teachers' Retirement System, Oklahoma City, named Advisory Research, Epoch Investment Partners and Boston Partners as finalists in the $8.2 billion system's search for its first active domestic all-cap equity manager, said CIO William Puckett. More than one manager could be selected to run the $300 million portfolio. Funding will likely come from reducing a $700 million S&P 500 index fund run by Northern Trust. An RFP was issued late last year, Mr. Puckett said. Consultant gregory.w.group assisted.