Exhibit 99.1 Sirius XM Holdings Reports First Quarter 2026 Operating and Financial Results NEW YORK – April 30, 2026 – Sirius XM Holdings announced first quarter 2026 operating and financial results today, reporting revenue of $2.09 billion, up 1% compared to the first quarter of 2025. Net income rose 20% year-over-year to $245 million, while earnings per diluted common share increased 22% to $0.72, from $0.59 in the prior year period. Adjusted EBITDA grew 6% to $666 million in the first quarter, driven by ...