Billionaire investor Warren Buffett’s Berkshire Hathaway (NYSE:BRK.A) has continued to buy shares in the broadcasting and radio company SiriusXM (NASDAQ:SIRI), adding more than 1.5M shares to push its stake above 32% this week.

Warren Buffett’s Berkshire Hathaway is buying the rest of its utility unit from the estate of a longtime board member who died three years ago, but it’s not clear exactly how much it will pay for the

Berkshire sold nearly 8.7 million shares for $370 million, as of Oct. 15, the filing showed. Last week, Berkshire sold 9.5 million shares worth $382.4 million that brought its stake in the company to below 10%,

Sirius XM, backed by Berkshire Hathaway, maintains strong market share and high ARPU despite competition from Spotify and Apple Music. Find out why SIRI stock is a Buy.

Warren Buffett’s company apparently is taking advantage of the weakness in the stock, which is down 50% this year.

Warren Buffett has been buying shares of Sirius XM Holdings. Between Oct. 9 and Oct. 11, Berkshire Hathaway purchased an additional 3,564,059 shares of Sirius XM for $86.7 million. This increased its stake in the company to 32.