Warren Buffett's Berkshire Hathaway bought a new stake in JPMorgan and increased its holding in Apple at the end of September, according to a 13F filings with the Securities and Exchange Commission.

Berkshire acquired 35.664 million shares of JPMorgan valued at about $4bn as of September 30, filings showed, and the firm boosted its stake in Apple, adding 522,902 shares, bringing its total stake in the iPhone maker to $56.994m.