Berkshire founder & CEO Warren Buffet says his firm has bought its 1st Amazon shares. The news led to Amazon shares surge 2.3% in the pre-market trade. The stake in Amazon is a first for the investment conglomerate. He was quoted as saying one of the fellows in the office that manages money, bought some Amazon. Buffet said that someone at Berkshire's asset management desk just invested in some Amazon shares, but it wasn't me.