Berkshire Hathaway's $1.6 billion stake in UnitedHealth Group is helping to lift the Dow Jones Industrial Average to a new record as investors pile into healthcare sector funds.

Shares of UnitedHealth Group tumbled more than 15% in morning trade on Thursday after a report said that the Justice Department is investigating the health insurer for potential fraud.

UnitedHealth Group Chairman Stephen Hemsley is returning to helm the health care conglomerate once again. He will replace Andrew Witty effective immediately.

UnitedHealth Group named Tim Noel the new CEO of the company's insurance division, UnitedHealthcare, after the targeted killing of former CEO Brian Thompson.

UnitedHealth Group CEO Andrew Witty told analysts that the company is positioned well for growth in 2025. This comes just a month after the CEO of its insurance unit was murdered.

A new report claims UnitedHealthcare is actively working to limit access to applied behavior analysis therapy, a critical treatment for patients with autism.

UnitedHealth Group CEO Andrew Witty wrote in an op-ed that the company wants to continue to push for health care industry reforms following the murder of UnitedHealthcare CEO Brian Thompson.

New York City police say writings by Luigi Mangione, the suspect in the murder of UnitedHealthcare CEO Brian Thompson, show the alleged killer has "ill will toward corporate America."

Experts say companies need to think about investing in personal security for their executives and their employees amid growing threats in today's society.

Luigi Mangione, who has been detained as a suspect in the murder of UnitedHealthcare CEO Brian Thompson, previously worked as a data engineer at TrueCar until 2023.