Buffett told CNBC he hadn't made the decision, but that "one of the fellows in the office that manage money" bought shares of the internet retailer and services provider.
The comments point to Todd Combs or Ted Weschler, each of whom manages portfolios for Berkshire, CNBC reported.
Berkshire is slated to report its latest financial results on Saturday. The company will file its quarterly update on details of its portfolio holdings later this month with the Securities and Exchange Commission.
Amazon is a holding in Jim Cramer's Action Alerts portfolio. Want to be alerted before Jim Cramer buys or sells AMZN? Learn more now.
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