OMAHA, Nebraska: Berkshire Hathaway increased its stake in Alphabet by 83% during the second quarter, lifting the Google and YouTube parent to become the conglomerate's third-largest stock investment.

Berkshire owned nearly 106 million Alphabet shares worth about $37.8 billion as of June 30, up from 57.8 million shares three months earlier, according to a regulatory filing. The holding included a $10 billion investment announced in June to help Alphabet expand its AI infrastructure.

Apple remained Berkshire's largest stock investment at $66 billion at the end of June, followed by American Express at $51.3 billion. Coca-Cola ranked fourth and Bank of America fifth.

Berkshire also eliminated its year-and-a-half investment in Constellation Brands while increasing stakes in Delta Air Lines and Macy's that it began building in the first quarter.

The changes were part of Berkshire's U.S.-listed stock holdings as of June 30, which comprised most of its $323.8 billion equity portfolio.

Berkshire bought $23.5 billion of stocks and sold $3.7 billion during the second quarter, ending a 14-quarter stretch in which it sold more stocks than it bought.

The company's cash pile declined to $364.7 billion on June 30 from $380.2 billion at the end of March. The decrease also reflected $4.5 billion in stock buybacks.

Warren Buffett, who remains Berkshire's chairman, said last month that investing in Alphabet was his idea. Berkshire began building the stake in the third quarter of last year. Buffett also said he and Chief Executive Greg Abel consult on how Berkshire allocates capital.

Berkshire's Delta investment grew 44% during the second quarter to 57.3 million shares worth nearly $5.4 billion. Its Macy's investment more than doubled to about 7.3 million shares worth $173 million.

The conglomerate also increased its investment in homebuilder Lennar and disclosed a $580,000 stake in D.R. Horton.

Berkshire reduced its holdings in Ally Financial, Bank of America, Capital One, DaVita, Kroger and Nucor.

Abel said in February that he oversaw 94% of Berkshire's stock holdings, while investment manager Ted Weschler handled 6%. The filing did not identify who was responsible for individual purchases or sales.