Warren Buffett’s Berkshire Hathaway (BRK.A) (BRK.B) has recently increased its stake in Sirius XM Holdings Inc. (SIRI), now owning over 35% of

Warren Buffett’s Berkshire Hathaway has spent another $54 million to purchase Sirius XM stock, giving it a stake of more than 35% in the satellite-radio company.

Shares of Sirius XM Holdings, Inc. (SIRI) rose early Tuesday as Warren Buffett-led Berkshire Hathaway, Inc. (BRK-A) (BRK-B) disclosed in a late Monday SEC filing that it has increased its stake in the New York-based broadcasting company.

Buffett strongly believes in concentrating Berkshire Hathaway's investment capital into his best ideas. Five top-tier companies, with clear competitive advantages and phenomenal capital-return programs,