Berkshire Hathaway 's ( BRK.A -0.33%) ( BRK.B -0.11%) portfolio has changed significantly over the past year, even though billionaire investor and company CEO Warren Buffett hasn't exactly been loading the company's portfolio with stocks. Investors have been taking note of Buffett's seemingly conservative investment strategy and what it might mean.

Here are the latest moves in Warren Buffett's Berkshire Hathaway portfolio, including his new bets on Constellation Brands and Domino's Pizza, while building a record $325 billion cash position.

Questions about succession will be front and center when shareholders convene May 3 in Omaha for the company’s annual meeting.