Flagship Harbor Advisors LLC lowered its stake in UnitedHealth Group Incorporated (NYSE:UNH – Free Report) by 14.2% during the 4th quarter, according to the company in its most recent disclosure with the Securities & Exchange Commission. The institutional investor owned 11,269 shares of the healthcare conglomerate’s stock after selling 1,871 shares during the period. Flagship Harbor Advisors LLC’s holdings in UnitedHealth Group were worth $3,720…