Greg Abel's Berkshire Hathaway Owns 37% of This Company. Here's Why the Stock Is Also a Buy for Retail Investors.

Berkshire Hathaway lifted its Sirius XM stake to 37.4% after buying $27 million in additional shares, a move that puts the satellite radio operator back on the radar for investors tracking SIRI and Berkshire's holdings (BRK.A, BRK.B).

The purchase lands as SIRI shows operating improvement in 2026, with positive subscriber growth and cash flow gains. Those two metrics matter because they speak directly to whether a long-challenged subscriber base has stabilized.

The larger catalyst is a strategic deal with Alphabet (GOOG, GOOGL) under which Sirius XM will manage YouTube's audio ad inventory. The article puts the potential at up to $2 billion in incremental annual revenue by 2029. If that figure materializes, it would position SIRI as a meaningful player in audio advertising rather than a pure subscription story.

Interpretation: the $27 million buy is small against a 37.4% ownership position, so the size of the purchase carries less signal than the direction. Berkshire is adding rather than trimming while the YouTube arrangement takes shape. The $2 billion projection is a ceiling ("up to"), and the 2029 timeline means the payoff is back-end loaded, so near-term results will lean on subscriber and cash flow trends.