PTC THERAPEUTICS, INC. — Director's Dealing 2026

Jan 8, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PTC THERAPEUTICS, INC. (PTCT)
CIK: 0001070081
Period of Report: 2026-01-06

Reporting Person: Boulding Mark Elliott (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-06	Common Stock	S	1739	$76.95	Disposed	119162	Direct
2026-01-07	Common Stock	S	1503	$77.48	Disposed	117659	Direct
2026-01-07	Common Stock	M	2625	$38.10	Acquired	120284	Direct
2026-01-07	Common Stock	S	1638	$77.11	Disposed	118646	Direct
2026-01-07	Common Stock	S	949	$77.91	Disposed	117697	Direct
2026-01-07	Common Stock	S	38	$78.60	Disposed	117659	Direct
2026-01-07	Common Stock	M	751	$38.10	Acquired	118410	Direct
2026-01-07	Common Stock	S	471	$77.10	Disposed	117939	Direct
2026-01-07	Common Stock	S	269	$77.92	Disposed	117670	Direct
2026-01-07	Common Stock	S	11	$78.98	Disposed	117659	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-07	Stock Option (Right to Buy)	$38.10	M	2625	Disposed	2032-01-06	Common Stock (2627)	Direct
2026-01-07	Stock Option (Right to Buy)	$38.10	M	751	Disposed	2032-01-06	Common Stock (751)	Direct

Footnotes

F1: 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.

F2: 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.

F3: This transaction was effected pursuant to a written Rule 10b5-1 plan adopted by the Reporting Person on December 4, 2024.

F4: 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.

F5: 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.

F6: 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.

F7: 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.

F8: Currently exercisable.