Matthew B. Klein - 13 May 2026 Form 4 Insider Report for PTC THERAPEUTICS, INC. (PTCT)

Reporting relationship: CHIEF EXECUTIVE OFFICER, Director
Issuer ticker: PTCT
Reported as of: 13 May 2026
Net transaction value: -$917,154
SEC form: 4
Accepted by SEC: 15 May 2026, 17:20:06 UTC
Prior SEC filing: 23 Apr 2026
Next SEC filing: 21 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 15 May 2026.

Key facts

This page summarizes Matthew B. Klein's Form 4 filing for PTC THERAPEUTICS, INC. (PTCT).
5 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 15 May 2026, 17:20.

Change

Previous filing in this sequence was filed on 23 Apr 2026.
Current net transaction value: -$917,154.

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: 15 May 2026

Reported non-derivative transactions

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

PTCT transaction

Common Stock

Award

Transaction value
Shares: +12,500
Change %: +3.2%
Price: $0.000000^*
Shares after: 406,570
Date: 13 May 2026
Ownership: Direct
Footnotes: F1

PTCT transaction

Common Stock

Sale

Transaction value: $49,608
Shares: -679
Change %: -0.17%
Price: $73.06
Shares after: 405,891
Date: 14 May 2026
Ownership: Direct

PTCT transaction

Common Stock

Sale

Transaction value: $527,711
Shares: -7,221
Change %: -1.8%
Price: $73.08
Shares after: 398,670
Date: 14 May 2026
Ownership: Direct

PTCT transaction

Common Stock

Sale

Transaction value: $153,468
Shares: -2,100
Change %: -0.53%
Price: $73.08
Shares after: 396,570
Date: 14 May 2026
Ownership: Direct

PTCT transaction

Common Stock

Sale

Transaction value: $186,367
Shares: -2,572
Change %: -0.65%
Price: $72.46
Shares after: 393,998
Date: 14 May 2026
Ownership: Direct
Footnotes: 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 the number of shares of the Issuer's common stock underlying restricted stock units ("RSUs") earned upon the vesting of performance-based restricted stock units ("PSUs") granted in December 2024. The Issuer's compensation committee of the board of directors certified the Issuer's achievement of a pre-established milestone set forth in the PSUs, as of May 13, 2026, which resulted in the reported RSUs being earned. Each earned RSU represents the contingent right to receive one share of the Issuer's common stock upon vesting. The earned RSUs immediately vested as to 6,250 shares on May 13, 2026 in connection with being earned and are scheduled to vest with respect to the remaining 6,250 shares on May 13, 2027.

Footnote F2

Represents shares automatically sold pursuant to an irrevocable sell to cover election entered into upon acceptance of the RSU grant to satisfy tax withholding obligations in connection with the vesting of the earned RSUs with respect to 6,250 shares on May 13, 2026.