Berkshire Hathaway has disclosed a $528.7 million stake in Verizon, or 11,022,743 shares.

Dan Loeb's Third Point LLC also disclosed a stake in the telecom giant.

Verizon shares were up more than 1% after hours Thursday.

In its latest 13-F filing, the Warren Buffett-helmed firm also said it had upped its stakes in Walmart, IBM, DaVita Healthcare and U.S. Bancorp.

See Also:

The FCC Just Approved A Proposal That Will Completely Change The Internet As We Know ItPhilippines Releases Photos Of China Building Something On Disputed ReefDAVID TEPPER: 'I Am Nervous. I Think It's Nervous Time.' Forget Sanctions Over Ukraine: Russia Scores Massive Gas Pipeline Deal With ChinaHow To Sell Absolutely Anything At Full Price