However, this isn't to say that Buffett and his stock pickers aren't buying any stocks. In fact, there's one company whose stock Berkshire has continued to buy, and it recently bought even more. According to recent SEC filings, Berkshire bought another 5 million shares of SiriusXM (NASDAQ: SIRI) for a cost of about $106.5 million.

Berkshire Hathaway has resumed acquiring shares of Warren Buffett's favorite media stock. Other insider buyers are focused on three biotech stocks.

According to a regulatory filing late Monday, Berkshire Hathaway sold approximately 1.64 million shares of DaVita Inc. on July 31, at an average price of $140.61 per share, totaling around $230 million,