The changes were disclosed in a regulatory filing that detailed Berkshire's U.S.-listed stock holdings, which comprise most of its $318.6 billion equity portfolio, as of Sept. 30.

Berkshire sold $7 billion of stocks and bought just $1.7 billion in the third quarter, a down period for its stock holdings led by Apple, whose share price fell 12%.

(Reporting by Jonathan Stempel in New York; Editing by Christian Schmollinger)