X0508 4 2026-01-08 0001070081 PTC THERAPEUTICS, INC. PTCT 0001707685 Utter Christine Marie C/O PTC THERAPEUTICS, INC. 500 WARREN CORPORATE CENTER DRIVE WARREN NJ 07059 false true false false SVP, CHIEF ACCOUNTING OFFICER 1 Common Stock 2026-01-08 4 S 0 1034 76.45 D 72693 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 2,900 RSUs from a January 7, 2022 grant of 11,600 RSUs. /s/ Avraham S. Adler, Attorney-in-Fact 2026-01-12