UnitedHealth Group announced a dramatic leadership shakeup, with former CEO and current chairman Stephen Hemsley stepping back into the top job following the abrupt resignation of Andrew Witty. The move comes at a time of escalating crises for the healthcare giant — including the recent fatal shooting of Brian Thompson,

UnitedHealth Group announced the surprise exit of CEO Andrew Witty on Tuesday and suspended its 2025 forecast due to surging medical costs, sending its shares down more than 10% premarket.

Andrew Witty is stepping down as CEO of health care giant UnitedHealth Group in a surprise transition that follows a period of unprecedented turbulence, including the public killing of a company executive and financial woes that in recent weeks have only intensified.

UnitedHealth Group surprises investors with what its CEO said was an "unusual and unacceptable" quarterly earnings miss, and lowers its outlook for the full year due to higher-than-expected medical costs, sparking a more than 20% selloff in shares that reverberated across the sector.

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

Brian Thompson, acting director of the popular redevelopment program, exits as the Trump administration pushes agencywide reorganization and cuts.