Buffett invested in Heinz in 2013 and two years later, Heinz merged with Kraft Foods. He bought 326 million shares during this merger at a cost of around $24.6 billion. He has held on to that stake, which is now worth $11.4 billion.

One of those value plays is Kraft Heinz ( KHC 0.72%), which trades at just 9 times forward earnings and pays a hefty forward dividend yield of 5.5%. Buffett gained 326 million shares of Kraft Heinz in 2015 after driving Kraft Foods to merge with H.J. Heinz, and he hasn't ever sold a single share.

Warren Buffett-led Berkshire Hathaway's (NYSE: BRK.A)(NYSE: BRK.B) had a substantial investment in General Motors (NYSE: GM). According to Berkshire's SEC filings, the conglomerate owned 50 million shares of GM at the beginning of that year,