Warren Buffett's company, Berkshire Hathaway, runs a large equities portfolio valued at over $300 billion.One thing I've always admired about Warren Buffett, outgoing CEO of Berkshire Hathaway, is that throughout his remarkable career, he has consistently adhered to his core investing principles without becoming entrenched in his old ways. Buffett and his team have never been afraid to invest in newer sectors.While Berkshire isn't buying pure artificial intelligence stocks, the company (at the direction of ...