Berkshire Hathaway boosted its stake in Alphabet by 83% in Q2, making it the firm's third-largest holding after Apple and American Express.

Berkshire owned about 106 million shares in the parent of Google, worth $37.9 billion at the end of June, according to a regulatory filing released Friday.

Berkshire Hathaway Q2 holdings shows new names and changes to old positions. Here's the list of changes and the top 10 holdings.