X0508 4 2026-01-08 0001070081 PTC THERAPEUTICS, INC. PTCT 0001808968 Klein Matthew B. C/O PTC THERAPEUTICS, INC. 500 WARREN CORPORATE CENTER DRIVE WARREN NJ 07059 true true false false CHIEF EXECUTIVE OFFICER 1 Common Stock 2026-01-08 4 S 0 2514 76.45 D 394453 D Represents shares automatically sold pursuant to irrevocable sell to cover elections entered into upon acceptance of the respective grants to satisfy tax withholding obligations in connection with the vesting of 5,250 RSUs from a January 7, 2022 grant of 21,000 RSUs. /s/ Avraham S. Adler, Attorney-in-Fact 2026-01-12