During the fourth quarter, Berkshire dumped 41.4 million shares of Oracle, an investment it first initiated during the third quarter of 2018.
Buffett added 14.4 million shares to its recent JPMorgan Chase stake (JPM), bringing the position north of 50 million shares.
Elsewhere, Buffett initiated a new position in Red Hat adding 4.1 million shares (RHT).
Julia La Roche is a finance reporter at Yahoo Finance. Follow her on Twitter.