Billionaire investor Buffett owned about 1.18 million shares in UnitedHealth between 2006 and 2009, before selling his entire stake in 2010 amid a broader retreat from health insurers.

Berkshire Hathaway revealed three new investments Thursday in steelmaker Nucor and two of the nation's biggest homebuilders — Lennar and DR Horton — but none of the investments are big enough to ensu...

The "vote of confidence" from Buffett validates UnitedHealth's long-term value, but " (the) management needs to regain trust and credibility with investors, and get back to its beat-and-raise reputat...