Warren Buffett's Berkshire Hathaway raised its stakes in Mitsubishi Corp., Mitsui & Co., Itochu, Marubeni and Sumitomo — all to 7.4%.Bloomberg | Bloomberg | Getty Images

Read Warren Buffett’s latest annual letter to Berkshire Hathaway shareholders

by · CNBC

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Warren Buffett released Saturday his annual letter to shareholders.

In it, the CEO of Berkshire Hathaway discussed how he still preferred stocks over cash, despite the conglomerate's massive cash hoard. He also lauded successor Greg Abel for his ability to pick opportunities — and compared him to the late Charlie Munger.