Matthew B. Klein - 04 Aug 2026 Form 4 Insider Report for PTC THERAPEUTICS, INC. (PTCT)

Reporting relationship: CHIEF EXECUTIVE OFFICER, Director
Issuer ticker: PTCT
Reported as of: 04 Aug 2026
Net transaction value: -$705,722
SEC form: 4
Accepted by SEC: 06 Aug 2026, 17:20:06 UTC
Prior SEC filing: 26 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Avraham S. Adler, Attorney-in-Fact

Key filing fact

Matthew B. Klein filed Form 4 for PTC THERAPEUTICS, INC. (PTCT) on 06 Aug 2026.

Key facts

This page summarizes Matthew B. Klein's Form 4 filing for PTC THERAPEUTICS, INC. (PTCT).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 06 Aug 2026, 17:20.

Change

Previous filing in this sequence was filed on 26 May 2026.
Current net transaction value: -$705,722.

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 0001808968 Primary reporting owner

Klein Matthew B.

Relationship: CHIEF EXECUTIVE OFFICER, Director
Address: C/O PTC THERAPEUTICS, INC., 500 WARREN CORPORATE CENTER DRIVE, WARREN
Signature: /s/ Avraham S. Adler, Attorney-in-Fact
Signature date: 06 Aug 2026

Reported non-derivative transactions

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

PTCT transaction

Common Stock

Sale

Transaction value: $705,722
Shares: -10,292
Change %: -2.6%
Price: $68.57
Shares after: 383,868
Date: 04 Aug 2026
Ownership: Direct
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

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 the 25,000 RSUs from an August 1, 2025 grant of 75,000 RSUs.

Footnote F2

Includes 162 shares of common stock acquired under the Issuer's employee stock purchase plan for the period ended June 30, 2026.