Massivemarkets

SEC Form 4

PTC Therapeutics, Inc. (PTCT) insider trading

In the 12 months to Oct 26, 2026, 12 PTCT insiders reported open-market sales of $51.2M across 47 filings; no open-market purchases were filed.

Latest filing · Last 12 months · Source: SEC EDGAR · How we count

Open-market sales
$51.2M
47 filings · 12 insiders
Open-market purchases
$0
0 filings
Pre-arranged sales (10b5-1)
47 of 47
All $51.2M sold was pre-arranged

Who traded PTCT, and when

  • Sale
  • Sale, pre-arranged (10b5-1)

PTCT daily close from Oct 27, 2025 to Oct 26, 2026, between $59.24 and $89.55, last $60.56. 47 sale and 0 purchase filings by 12 insiders, marked at their filing dates. Neil Gregory Almstead, CHIEF TECHNICAL OPS OFFICER: sold $21.9M across 9 filings, first filed Nov 26, 2025, last Jul 13, 2026. Eric Pauwels, CHIEF BUSINESS OFFICER: sold $6.9M across 4 filings, first filed Dec 19, 2025, last Jun 12, 2026. Michael Schmertzler, Director: sold $6.6M across 6 filings, first filed Aug 21, 2026, last Oct 16, 2026. Mark Elliott Boulding, EXEC. VP AND CLO: sold $3.7M across 14 filings, first filed Nov 19, 2025, last Oct 13, 2026. Emma Reeve, Director: sold $2.5M across 5 filings, first filed Oct 31, 2025, last Jan 6, 2026. Allan Steven Jacobson, Director: sold $2.1M across 1 filing, first filed Nov 26, 2025, last Nov 26, 2025. 6 others: sold $7.4M across 8 filings, first filed Jan 6, 2026, last Oct 2, 2026.

Largest mark · tap a row for others

Neil Gregory Almstead · CHIEF TECHNICAL OPS OFFICER

Filing 1 of 2 within a week · $8,853,963 total

Sale $2,852,031

35,572 shares at $80.18 avg

Filed Nov 26, 2025 · traded Nov 24

Pre-arranged (10b5-1) · close on filing date $86.25

PTCT daily closelast $60.56

Neil Gregory Almstead · CHIEF TECHNICAL OPS OFFICER

$21.9M sold

Eric Pauwels · CHIEF BUSINESS OFFICER

$6.9M sold

Michael Schmertzler · Director

$6.6M sold

Mark Elliott Boulding · EXEC. VP AND CLO

$3.7M sold

Emma Reeve · Director

$2.5M sold

Allan Steven Jacobson · Director

$2.1M sold

6 others

$7.4M sold
One row per insider, smaller filers combined; marks sit at the SEC filing date, sized by dollar value.

Open-market trades

47 filings in the last 12 months
Other insider activity (not market trades) · 130 records
  • Option exercises67 records
  • Tax withholding (sold to cover)38 records
  • Grants and awards24 records
  • Gifts1 record

Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.

How to read this page

Open-market purchase or sale
A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
Pre-arranged (10b5-1)
The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
Filing date
Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.

Frequently asked questions

Has PTC Therapeutics, Inc.'s CEO sold stock?

Yes. Matthew B. Klein (CEO) sold 10,000 shares ($730.8K) in May 2026, all under a pre-arranged 10b5-1 plan.

How current is PTCT’s insider data?

These are PTCT Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.

What counts as an open-market buy or sell?

Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.

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Track PTCT insider trades with your agent

This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:

Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for PTCT every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.

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