Shares ofSirius XM Holdings Inc(NASDAQ:SIRI) are trading higher by 10% to $27.75 since Monday's open, buoyed by news thatWarren Buffett's Berkshire Hathawayhas increased its stake in the company.

What To Know:According to a regulatory filing, Berkshire recently acquired an additional 3.56 million shares of SiriusXM, with purchases made between October 9 and October 11 at prices ranging from $22.96 to $25.14, for a total investment of approximately $87 million. This brings Berkshire's total ownership to 108.7 million shares, representing a 32% stake in the company.

The timing of the stake increase is particularly relevant to SiriusXM investors, as the company is...