Berkshire Hathaway's operating profits fell 14% last quarter on insurance weakness, while Warren Buffett was a net seller of stocks once again.

Warren Buffett has long complained that Berkshire Hathaway has become so huge that it’s difficult to find acquisitions that are both undervalued and large enough to make a material difference to the company’s bottom line.

Investors often use Berkshire Hathaway's quarterly-filed Form 13Fs to track Warren Buffett's trading activity. Buffett has been a net seller of stocks for nine consecutive quarters, which has ballooned Berkshire's cash pile to $334 billion.

Wall Street has clawed back losses incurred after President Donald Trump imposed global tariffs a month ago, capping the longest winning streak in two decades for US stocks. Shares saw gains for the ninth day in a row for the first time since 2004 after a better-than-expected jobs report and rising hope of US-China trade talks.