But the documents Berkshire Hathaway Inc. filed with regulators Tuesday don't reveal everything Buffett and the company's two new investment managers have been buying. That's because they are allowed to omit some of its holdings from the report.
Berkshire tweaked a number of positions in its $75.3 billion portfolio during the first three months of 2012.
It boosted its investments in DirecTV, Liberty Media, DaVita Inc. and the Bank of New York Mellon.
Berkshire also reduced its holdings in Intel Corp., Kraft Foods, Dollar General, Procter & Gamble and Verisk Analytics.