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sellWeak cluster of 210b5-1 plan

Mark Elliott Boulding sold $827k of PTCT

EXEC. VP AND CLO at PTC THERAPEUTICS, INC.. 15,521 shares at an average of $53.30, traded Mar 12, 2025, filed Mar 14, 2025.

Warning score
16
Value
$827k
15,521 shares
Holdings after
103,901
-13% from before
From 52-week low
+66%
low $32.27, close $53.61
From 52-week high
-3%
high $55.26, as of Mar 12, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $827k at market
    +23
  • Share of holdings sold
    Sold 13% of holdings
    +5
  • Cluster
    2 insiders selling within 14 days
    +8
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -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.

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 Mar 14, 2025: +18.7%SPY +41.1% · excess -22.3%

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 0001415889-25-008141, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 12, 2025MOption exercise
Common Stock10b5-1
+13,126$33.02$433k117,027Mar 14, 2025
Mar 12, 2025SOpen-market sale
Common Stock10b5-1
-13,126$53.31$700k103,901Mar 14, 2025
Mar 12, 2025MOption exercise
Common Stock10b5-1
+2,395$33.02$79k106,296Mar 14, 2025
Mar 12, 2025SOpen-market sale
Common Stock10b5-1
-2,395$53.23$127k103,901Mar 14, 2025
Mar 12, 2025MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-13,126$0.00$00Mar 14, 2025
Mar 12, 2025MOption exercise
Stock Option (Right to Buy)derivative10b5-1
-2,395$0.00$00Mar 14, 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%
23Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Neil Gregory Almstead
CHIEF TECHNICAL OPS OFFICER
$2.9M
35,572 shares
-35%
33Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Neil Gregory Almstead
CHIEF TECHNICAL OPS OFFICER
$6.0M
71,928 shares
-70%
0Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Mark Elliott Boulding
EXEC. VP AND CLO
$214k
2,812 shares
-3%
0Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Mark Elliott Boulding
EXEC. VP AND CLO
$214k
3,375 shares
-3%
33Weak
PTCTsell 210b5-1
PTC THERAPEUTICS, INC.
Neil Gregory Almstead
CHIEF TECHNICAL OPS OFFICER
$3.6M
55,000 shares
-53%

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.

Mark Elliott Boulding sold $827k of PTCT | InsiderTell