First Quarter 2026 compared to the year-ago period: Selected GAAP Financial Data ($in millions, except per share data and unit sales) Exhibit 99.1 Investor Contact: Derek Fiebig (954) 769-2227 fiebigd@autonation.com Media Contact: Lisa Rhodes Ryans (954) 769-4120 publicrelations@autonation.com AutoNation Reports First Quarter 2026 Results FORT LAUDERDALE, Fla., (May 1, 2026) — AutoNation, Inc. (NYSE: AN) today reported first quarter 2026 revenue of$6.6 billion, a decrease of 2% compared to the same period ...