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sellWeak10b5-1 plan

ForGrowth NAP B.V. sold $4.1M of NAMS

owner at NewAmsterdam Pharma Co N.V.. 157,234 shares at an average of $25.86, traded Dec 18, 2024, filed Dec 20, 2024.

Warning score
17
Value
$4.1M
157,234 shares
Holdings after
10,851,996
-1% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    10% owner
    +12
  • Trade size
    $4.1M at market
    +25
  • Share of holdings sold
    Sold 1.4% of holdings
    0
  • Cluster
    No other insider selling within 14 days
    0
  • 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 -7.6%, 3m -6.4%, 6m -29.6%.

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.

NAMSOct 12, 2026 · close 21.25
Since filing Dec 20, 2024: -16.7%SPY +34.2% · excess -50.9%

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 0000950170-24-139069, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 18, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-54,518$25.72$1.4M10,954,712Dec 20, 2024
Dec 18, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-46,210$26.55$1.2M10,908,502Dec 20, 2024
Dec 19, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-56,506$25.45$1.4M10,851,996Dec 20, 2024

Related signals

Other insiders at NewAmsterdam Pharma Co N.V. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
15Weak
NAMSsell10b5-1
NewAmsterdam Pharma Co N.V.
Johannes Jacob Pieter Kastelein
Chief Scientific Officer
$1.3M
50,246 shares
-42%
38Weak
NAMSbuy
NewAmsterdam Pharma Co N.V.
Michael H. Davidson
Chief Executive Officer
$227k
10,000 shares
+1%
34Weak
NAMSsell 2
NewAmsterdam Pharma Co N.V.
John W Smither
director
$41k
1,600 shares
-15%
33Weak
NAMSsell 210b5-1
NewAmsterdam Pharma Co N.V.
Johannes Jacob Pieter Kastelein
Chief Scientific Officer
$3.4M
125,000 shares
-64%
25Weak
NAMSsell10b5-1
NewAmsterdam Pharma Co N.V.
Louise Frederika Kooij
Chief Accounting Officer
$3.2M
105,000 shares
-81%
25Weak
NAMSsell10b5-1
NewAmsterdam Pharma Co N.V.
Louise Frederika Kooij
Chief Accounting Officer
$1.2M
40,000 shares
-62%
25Weak
NAMSsell10b5-1
NewAmsterdam Pharma Co N.V.
Louise Frederika Kooij
Chief Accounting Officer
$2.3M
65,000 shares
-73%
75Notable
NAMSsell 3
NewAmsterdam Pharma Co N.V.
Louis G Lange
director
$1.4M
44,619 shares
-81%
73Notable
NAMSsell 3
NewAmsterdam Pharma Co N.V.
Louis G Lange
director
$829k
28,186 shares
-100%
40Moderate
NAMSsell 310b5-1
NewAmsterdam Pharma Co N.V.
Johannes Jacob Pieter Kastelein
Chief Scientific Officer
$9.1M
300,000 shares
-173%

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.

ForGrowth NAP B.V. sold $4.1M of NAMS | InsiderTell