Or, at least someone on his investment team is. Buffett's holding company now owns around $2.4 billion in Sirius XM shares, equal to roughly 30% of the total shares outstanding. Buffett's involvement alone is triggering many investors to pay closer attention.

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.

We recently compiled a list of the 6 Undervalued Entertainment Stocks To Buy Right Now. In this article, we are going to take a look at where Sirius XM Holdings Inc. (NASDAQ:SIRI) stands against the other undervalued entertainment stocks.

Warren Buffett’s Berkshire Hathaway (NYSE:BRK.A) (NYSE:BRK.B) has further raised its bet on Sirius XM Holdings (NASDAQ:SIRI), boosting its stake to over 35%, latest regulatory filings show. The conglomerate acquired around 2.

This was the stock's second consecutive day of gains.