Berkshire Hathaway chairman Warren Buffett sings and plays his ukulele with The Quebe Sisters Band at the Berkshire Hathaway annual meeting in Omaha May 1, 2010. REUTERS/Rick Wilking Warren Buffett's Berkshire Hathaway confirmed the size of its Snowflake stake in a regulatory filing on Monday.The billionaire investor's company owns about 5.1 million Class A shares, or 2.2%, of the cloud-data platform's outstanding stock.Berkshire has notched a $800 million gain, as it spent $735 million on shares worth more than $1.5 billion as of Monday's close.The unusual bet shows that Buffett's company is "evolving and becoming a much more tech-aware, tech-centric, tech-focused conglomerate," Snowflake CEO Frank Slootman told Yahoo Finance.Visit Business Insider's homepage for more stories.Warren Buffett's Berkshire Hathaway officially disclosed its stake in Snowflake on Monday, confirming it has scored a $800 million gain on its investment in the cloud-data platform.The famed investor's conglomerate owns about 6.1 million Class A shares, it said in a regulatory filing.