Despite his immense wealth, Warren Buffett, as he admits, is a man of simple tastes. Perhaps that focus on basic American food staples inspired one of the more unexpected new buys from his investment vehicle Berkshire Hathaway (NYSE: BRK.

However, Warren Buffett and Berkshire Hathaway own more stocks than those regulatory filings disclose. At least one ultra-high-yield dividend stock in Buffett's "secret portfolio" is a no-brainer buy right now.

Key Takeaways Warren Buffett's Berkshire Hathaway continues to be a net seller of stocks, having offloaded a quarter of its stake in Apple in recent months, regulatory filings revealed Thursday.The holding company added to its cash pile for a ninth consecutive quarter,