SiriusXM Holdings (SIRI) announced a partnership with Google's YouTube in April, making it the exclusive advertising representative for YouTube's U.S. audio advertising inventory. This deal, set to kick off in the fall, is expected to drive revenue growth for SiriusXM by handling the ad process and offering cross-selling opportunities for advertisers. Berkshire Hathaway holds a 37% stake in SiriusXM. The company's stock has climbed nearly 50% in 2026, and its advertising revenue for the first six months of 2026 reached $861 million, a 4.2% increase year-over-year. Analysts suggest this move could significantly boost SiriusXM's position in the growing audio advertising market, which is projected to reach $38.5 billion by 2030.