What Were Some Stock Picks in the Warren Buffett Portfolio in 2015?

As of the end of June 2015, Warren Buffett's holding company, Berkshire Hathaway, invested 24.7 percent of its $107 billion portfolio in Wells Fargo & Co., according to Stockpickr. The company also invested 14.7 percent of its funds in Coca-Cola Co., 12.1 percent in International Business Machines Corp., 11 percent in American Express Co., 4 percent in Wal-Mart Stores Inc. and 3.9 percent in Procter & Gamble Co.

Berkshire Hathaway invested further in Wells Fargo throughout 2015, in spite of the stock trading at all-time highs, notes the San Francisco Business Times. Wells Fargo first became Berkshire Hathaway's largest investment in 2012, and the company is the bank's largest shareholder. Buffet explains his like of the bank as resulting from it "serving real customers in the real economy." The bank has also provided services to Berkshire Hathaway, including in its acquisition of Heinz.

Berkshire Hathaway's investment in Coca-Cola results partially from Buffett's personal liking of the brand. Buffet claims that he regularly consumes a quarter of his daily calories from Coca-Cola, says Business Insider. Buffett believes that the company will perform well in the future, in spite of more health-conscious trends. Berkshire Hathaway's 400 million shares make it Coca-Cola's largest institutional investor.

Buffet also increased his investment in IBM in 2015, with Berkshire Hathaway buying nearly half a billion dollars in additional shares, notes Fortune. The company's shares fell significantly in 2014, making investors more critical of Buffett's decision. However, Buffett's investing partner Charlie Munger believes the company is headed for a turnaround.