X0508 4 2026-01-06 0001070081 PTC THERAPEUTICS, INC. PTCT 0001323212 Pauwels Eric C/O PTC THERAPEUTICS, INC. 500 WARREN CORPORATE CENTER DRIVE WARREN NJ 07059 false true false false CHIEF BUSINESS OFFICER 1 Common Stock 2026-01-06 4 S 0 1789 76.95 D 88841 D Common Stock 2026-01-07 4 S 0 1352 77.48 D 87489 D Represents shares automatically sold pursuant to an irrevocable sell to cover election entered into upon acceptance of the grant to satisfy tax withholding obligations in connection with the vesting of 5,500 RSUs from a January 3, 2025 grant of 22,000 RSUs. Represents shares automatically sold pursuant to an irrevocable sell to cover election entered into upon acceptance of the grant to satisfy tax withholding obligations in connection with the vesting of 4,500 RSUs from a January 5, 2023 grant of 18,000 RSUs. /s/ Avraham S. Adler, Attorney-in-Fact 2026-01-08