Andrew Witty has resigned as chief executive of US health conglomerate UnitedHealth Group, as the company pulled its financial forecasts for 2025, adding to a sense of crisis after a turbulent period.

Stephen Hemsley hasn’ t been CEO at UnitedHealth Group in nearly a decade yet he’ s never really left. Since that day, the company’ s stock has fallen from $610 a share to $308 on Tuesday, an unprecedented decline for the company that culminated in this week’ s CEO transition.

Stephen Hemsley will also get additional personal security benefits following the December murder of UnitedHealth’s top insurance executive.

The executive earlier caused public outrage when he defended the insurance giant’s practice of denying health care claims.

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

Key Takeaways Shares of health insurance providers tumbled on a report UnitedHealth Group is being investigated by U.S. officials over possible fraud.The Wall Street Journal said the Department of Justice was looking into the company's Medicare Advantage business.

UnitedHealth Group is being investigated for possible Medicare fraud, according to The Wall Street Journal, sending shares of the healthcare company sliding in after-hours trading just one day after its CEO,