Exhibit 99.1 SiriusXM Reports First Quarter 2025 Operating and Financial Results NEW YORK – May 1, 2025 – SiriusXM today announced first quarter 2025 operating and financial results, including revenue of $2.07 billion, a 4$204 million, down from $241 million in the prior-year period. Earnings per diluted common share were$0.59 in the first quarter of 2025, compared to $0.63 in the first quarter of 2024. Adjusted EBITDA was$629 million in ...