The first high-flying AI stock Warren Buffett secretly owns is industry-leading networking-solutions provider Broadcom (NASDAQ: AVGO). New England Asset Management closed out the third quarter with 19,855 shares of Broadcom, which has a present-day value of nearly $4.5 million.

When I make reference to Buffett's favorite stock, I'm talking about none other than Berkshire Hathaway itself. Buffett has authorized the repurchase of $77.8 billion worth of Berkshire stock since 2018, which is more than twice the amount the conglomerate invested in Apple.

After decades of anticipation, Warren Buffett, the legendary investor and chairman of Berkshire Hathaway, has named his son Howard "Howie" Buffett as the non-executive chairman of the multi-billion-dollar conglomerate.

Berkshire Hathaway CEO Warren Buffett was born in Omaha, Nebraska, in 1930 and is one of history's most successful investors. Trained under the tutelage of Benjamin Graham, the father of value investing,

The Oracle of Omaha's secret portfolio contains 120 securities -- one of which is a historically cheap AI stock.