Exhibit 99.1 Quince Therapeutics Provides Business Update and Reports First Quarter 2025 Financial Results Plan to potentially conclude enrollment early for Phase 3 NEAT clinical trial in Ataxia-Telangiectasia (A-T) to align topline results with existing cash runway SOUTH SAN FRANCISCO, Calif. – May 13, 2025 – Quince Therapeutics, Inc. (Nasdaq: QNCX), a late-stage biotechnology company dedicated to unlocking the power of a patient's own biology for the treatment of rare diseases, today provided an update on ...