Andrew Witty, who largely led the U.S. healthcare giant from the U.K., made big bets on Medicare enrollees that backfired.

Andrew Witty is stepping down from his position as UnitedHealth's CEO for personal reasons, insurer says in surprise announcement.

UnitedHealth Group CEO Andrew Witty has announced his resignation on Thursday, citing personal reasons at a time when the country's largest health insurer grapples with rising medical costs, ...

The health care conglomerate is facing mounting financial problems – and ongoing consumer anger over high costs and denied ...

UnitedHealth (UNH, Financials) shares gained 1% Monday after newly reinstated CEO Steve Hemsley apologized for the company's ...