Berkshire scoops up roughly 5 million SIRI shares on post-earnings decline. Here's why Warren Buffett remains positive on Sirius XM stock

When you think of stock market success, it's hard not to think about Warren Buffett. Buffett, known as the Oracle of Omaha, has been at the helm of Berkshire Hathaway ( BRK.A -3.04%) ( BRK.B -2.85%) since 1965 but plans to retire at the end of this year at the age of 95.

While Berkshire’s quarterly operating earnings were down year-over-year, there were several pleasant surprises. Warren Buffett continued to be a net seller of stocks.