Warren Buffett made about $650 million on HP after stake was revealed
HP's stock just had its best day in more than two years, and Warren Buffett's Berkshire Hathaway is almost $650 million richer because of it.

Berkshire revealed ownership of 121 million HP shares, in a filing with the Securities and Exchange Commission on Wednesday, making it the biggest stakeholder in the PC and printer maker, surpassing Vanguard.

HP shares surged 15% on Thursday, following the disclosure, boosting the value of Berkshire's stake to $4.85 billion from $4.2 billion. It was the biggest rally for HP since the early days of the pandemic in March 2020.