Harvard University announced that Stephen Blyth will take over as president and CEO of Harvard Management Co. Since 2006, Blyth has been HMC's managing director and head of public markets, responsible for investments in public equity, credit, and fixed-income markets.arvard University announced that Stephen Blyth will take over as president and CEO of Harvard Management Co. Since 2006, Blyth has been HMC's managing director and head of public markets, responsible for investments in public equity, credit, and fixed-income markets.