PTC Therapeutics June 2025 Matthew B. Klein, MD CEO Pam and Kelsey living with PKU 1 Corporate Presentation – June 2025 Forward Looking Statements This presentation contains forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. All statements contained in this presentation, other than statements of historic fact, are forward-looking statements, including statements regarding: the future expectations, plans and prospects for PTC, including with respect to the ...