Warren Buffet is currently showing off his portfolio in style but he has not invested a large part of his diversifications into tech stocks itself. His top-notch portfolio features three top AI stocks in the US stock market and these are his justifications of buying these stocks.

Warren Buffett has made some rather bearish moves in Berkshire Hathaway's (NYSE: BRK.A)(NYSE: BRK.B) stock portfolio in the past few quarters. Most notably, the legendary investor disposed of significant portions of both the Apple and Bank of America investments that have performed extremely well for Berkshire.

With a market capitalization of $49.4 billion, Nubank parent company, Nu Holdings (NU) has emerged as a disruptive force in Latin American banking. It operates a digital banking platform, providing a wide range of financial products such as no-fee credit cards,