X0508 4 2026-01-06 0001070081 PTC THERAPEUTICS, INC. PTCT 0001578852 Boulding Mark Elliott C/O PTC THERAPEUTICS, INC. 500 WARREN CORPORATE CENTER DRIVE WARREN NJ 07059 false true false false EXEC. VP AND CLO 1 Common Stock 2026-01-06 4 S 0 1739 76.95 D 119162 D Common Stock 2026-01-07 4 S 0 1503 77.48 D 117659 D Common Stock 2026-01-07 4 M 0 2625 38.10 A 120284 D Common Stock 2026-01-07 4 S 0 1638 77.11 D 118646 D Common Stock 2026-01-07 4 S 0 949 77.91 D 117697 D Common Stock 2026-01-07 4 S 0 38 78.60 D 117659 D Common Stock 2026-01-07 4 M 0 751 38.10 A 118410 D Common Stock 2026-01-07 4 S 0 471 77.10 D 117939 D Common Stock 2026-01-07 4 S 0 269 77.92 D 117670 D Common Stock 2026-01-07 4 S 0 11 78.98 D 117659 D Stock Option (Right to Buy) 38.10 2026-01-07 4 M 0 2625 0 D 2032-01-06 Common Stock 2627 751 D Stock Option (Right to Buy) 38.10 2026-01-07 4 M 0 751 0 D 2032-01-06 Common Stock 751 0 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 4,500 RSUs from a January 3, 2025 grant of 18,000 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 4,250 RSUs from a January 5, 2023 grant of 17,000 RSUs. This transaction was effected pursuant to a written Rule 10b5-1 plan adopted by the Reporting Person on December 4, 2024. This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $76.56 to $77.55 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $77.58 to $78.54 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $76.54 to $77.52 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. This price represents the weighted average price of sale transactions that were executed in multiple trades at prices ranging from $77.54 to $78.47 per share. The Reporting Person hereby undertakes, upon request by the SEC staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price. Currently exercisable. /s/ Avraham S. Adler, Attorney-in-Fact 2026-01-08