Buffett's Berkshire eliminates stake in Ameriprise

In a quarterly statement of holdings filed with the Securities and Exchange Commission, the closely watched investor reported no stake in financial-services company Ameriprise as of March 31, compared with 661,742 shares as of Dec. 31.

Among companies in which the "Oracle of Omaha" raised his stake were food maker Kraft, from 132.4 million shares to 138.8 million, and railroad Burlington Northern Santa Fe, from 60.8 million shares to 63.8 million. He also lifted his stake in manufacturer Ingersoll Rand Co., from 636,600 shares to 936,600.

Berkshire reported a lower stake in data- and document-storage company Iron Mountain Inc., which went from 4.7 million shares to 3.4 million.

The company's disclosed investments had a total market value of $66.5 billion on March 31, compared with $68.8 billion on Dec. 31.

The investment company also reported a slightly lower stake in banking company Wells Fargo & Co. and slightly higher stakes in auto retailer Carmax Inc., banking company US Bancorp and health insurer United Health Group.

Berkshire reported no new stakes in companies not on its previous report.

Berkshire's subsidiaries include insurance, clothing, furniture, natural gas, corporate jet and candy companies. Berkshire also has major investments in such companies as Coca-Cola Co. and Anheuser-Busch Cos.