Stephen Hemsley will return to running the healthcare giant he helped build, succeeding CEO Andrew Witty.

UnitedHealth Group announced that CEO Andrew Witty is stepping down due to 'personal reasons,' and former CEO Stephen Hemsley will replace him.

Witty’s departure was surprising, though it follows a sharp downturn in the healthcare juggernaut’s financial outlook. He is ...

Former UnitedHealth Group chief executive officer Stephen Hemsley to replace Andrew Witty. Here's what we know.