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sellWeak cluster of 410b5-1 plan

Matthew B. Klein sold $271k of PTCT

CHIEF EXECUTIVE OFFICER at PTC THERAPEUTICS, INC.. 3,428 shares at an average of $79.07, traded Dec 2, 2025, filed Dec 3, 2025.

Warning score
33
Value
$271k
3,428 shares
Holdings after
349,964
-1% from before
From 52-week low
+117%
low $36.19, close $78.50
From 52-week high
-9%
high $86.25, as of Dec 2, 2025

Score components

  • Role
    CEO
    +25
  • Trade size
    $271k at market
    +13
  • Share of holdings sold
    Sold 1.0% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m +1.3%, 3m -15.1%, 6m -9.3%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

PTCTOct 9, 2026 · close 64.70
Since filing Dec 3, 2025: -14.6%SPY +15.0% · excess -29.6%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001808968-25-000003, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 1, 2025AGrant or award
Common Stock10b5-1
+15,625$0.00$0353,392Dec 3, 2025
Dec 2, 2025SOpen-market sale
Common Stock10b5-1
-3,428$79.07$271k349,964Dec 3, 2025

Related signals

Other insiders at PTC THERAPEUTICS, INC. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
21Weak
PTCTsell 310b5-1
PTC THERAPEUTICS, INC.
Michael Schmertzler
director
$158k
2,500 shares
-0%
6Weak
PTCTsell 310b5-1
PTC THERAPEUTICS, INC.
Mark Elliott Boulding
EXEC. VP AND CLO
$133k
2,073 shares
-2%
27Weak
PTCTsell 310b5-1
PTC THERAPEUTICS, INC.
Glenn Steele Jr Md Phd
director
$782k
12,000 shares
-35%
28Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Michael Schmertzler
director
$1.3M
20,000 shares
-2%
20Weak
PTCTsell10b5-1
PTC THERAPEUTICS, INC.
Michael Schmertzler
director
$1.4M
20,000 shares
-1%
28Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Michael Schmertzler
director
$1.8M
25,000 shares
-2%
28Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Michael Schmertzler
director
$1.8M
25,000 shares
-2%
7Weak
PTCTsell 310b5-1
PTC THERAPEUTICS, INC.
Mark Elliott Boulding
EXEC. VP AND CLO
$204k
2,813 shares
-3%
34Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Matthew B. Klein
CHIEF EXECUTIVE OFFICER
$706k
10,292 shares
-3%
31Weak
PTCTsell 410b5-1
PTC THERAPEUTICS, INC.
Pierre Gravier
CHIEF FINANCIAL OFFICER
$281k
3,494 shares
-4%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Matthew B. Klein sold $271k of PTCT | InsiderTell