Mary L. Smith - 09 Jul 2026 Form 4 Insider Report for PTC THERAPEUTICS, INC. (PTCT)

Reporting relationship: Director
Issuer ticker: PTCT
Reported as of: 09 Jul 2026
Net transaction value: -$1,425,060
SEC form: 4
Accepted by SEC: 13 Jul 2026, 17:20:09 UTC
Prior SEC filing: 06 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Avraham S. Adler, Attorney-in-Fact

Key filing fact

Mary L. Smith filed Form 4 for PTC THERAPEUTICS, INC. (PTCT) on 13 Jul 2026.

Key facts

This page summarizes Mary L. Smith's Form 4 filing for PTC THERAPEUTICS, INC. (PTCT).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 13 Jul 2026, 17:20.

Change

Previous filing in this sequence was filed on 06 Jan 2026.
Current net transaction value: -$1,425,060.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001866044 Primary reporting owner

Smith Mary L.

Relationship: Director
Address: C/O PTC THERAPEUTICS, INC., 500 WARREN CORPORATE CENTER DRIVE, WARREN
Signature: /s/ Avraham S. Adler, Attorney-in-Fact
Signature date: 13 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PTCT transaction

Common Stock

Options Exercise

Transaction value
Shares: +10,000
Change %: +46%
Price: $42.95^*
Shares after: 31,813
Date: 09 Jul 2026
Ownership: Direct
Footnotes: F1

PTCT transaction

Common Stock

Sale

Transaction value: $900,000
Shares: -10,000
Change %: -31%
Price: $90.00
Shares after: 21,813
Date: 09 Jul 2026
Ownership: Direct
Footnotes: F1

PTCT transaction

Common Stock

Options Exercise

Transaction value
Shares: +5,834
Change %: +27%
Price: $42.95^*
Shares after: 27,647
Date: 09 Jul 2026
Ownership: Direct
Footnotes: F1

PTCT transaction

Common Stock

Sale

Transaction value: $525,060
Shares: -5,834
Change %: -21%
Price: $90.00
Shares after: 21,813
Date: 09 Jul 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PTCT transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -10,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 09 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,000
Exercise price: $42.95
Footnotes: F1, F2

PTCT transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -5,834
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 09 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 5,834
Exercise price: $42.95
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

This transaction was effected pursuant to a written Rule 10b5-1 plan adopted by the reporting person on November 11, 2025.

Footnote F2

Currently exercisable.