Investors Tune In to Sirius XM Stock on Buffett Investment

Key TakeawaysWarren Buffett's Berkshire Hathaway boosted its stake in Sirius XM Holdings.Berkshire added more than 96 million shares in the second quarter.The news lifted Sirius shares, which have slumped this year, at one point hitting a 12-year low. Shares of Sirius XM Holdings (SIRI) advanced Thursday after Warren Buffett's Berkshire Hathaway (BRK.A, BRK.B) made a big addition of the stock to its portfolio in the second quarter.  In a regulatory filing, Berkshire reported it now held 132,878,213 shares o ...