The health care giant's shares are down more than 50% in the last month. That's hurting the powerful U.S. stock-market index.

The company’s stock has declined over its financial performance and the sudden replacement of its CEO.

The Department of Justice has launched an investigation of UnitedHealth Group for possible criminal Medicare fraud, according ...

The U.S. Justice Department is investigating UnitedHealth for possible criminal medical fraud. The investigation began as ...

One of the nation’s largest health insurers is reportedly the target of a Department of Justice investigation for alleged healthcare fraud.

UnitedHealth Group slid again Thursday as the market processed a Wall Street Journal report that the U.S. Department of Justice has launched a criminal fraud investigation of Medicare billing ...

Stocks turned in a mixed performance on Thursday, extending a winning streak for one major index and ending one for another, ...

Health-care companies fell after reports that UnitedHealth Group was under federal investigation. Shares of UnitedHealth plunged after reports the Department of Justice was investigating allegations ...

The reported probe adds to a string of recent setbacks that have erased more than half, or over $300 billion, from its market ...

It keeps getting worse for UnitedHealth Group Inc. investors, as a report of a criminal investigation into its Medicare ...

UnitedHealth Group (UNH) shares cratered more than 13% Thursday morning after The Wall Street Journal reported that the ...