Skip to content
sellWeak10b5-1 plan

ForGrowth NAP B.V. sold $2.3M of NAMS

owner at NewAmsterdam Pharma Co N.V.. 91,068 shares at an average of $25.58, traded Dec 20, 2024, filed Dec 26, 2024.

Warning score
17
Value
$2.3M
91,068 shares
Holdings after
10,760,928
-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
    $2.3M at market
    +25
  • Share of holdings sold
    Sold 0.8% 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.

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 9, 2026 · close 21.58
Since filing Dec 26, 2024: -17.7%SPY +32.0% · excess -49.8%

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 0000950170-24-140408, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 20, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-44,143$25.53$1.1M10,807,853Dec 26, 2024
Dec 20, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-5,629$26.13$147k10,802,224Dec 26, 2024
Dec 23, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-25,132$25.49$641k10,777,092Dec 26, 2024
Dec 24, 2024SOpen-market sale
Ordinary Sharesindirect: See footnote10b5-1
-16,164$25.66$415k10,760,928Dec 26, 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%
26Weak
NAMSsell
NewAmsterdam Pharma Co N.V.
John W Smither
director
$41k
1,600 shares
-15%
15Weak
NAMSbuy
NewAmsterdam Pharma Co N.V.
James N Topper
director
$16k
660 shares
+0%
45Moderate
NAMSsell
NewAmsterdam Pharma Co N.V.
Louise Frederika Kooij
Chief Accounting Officer
$3.9M
150,000 shares
-91%
20Weak
NAMSbuy
NewAmsterdam Pharma Co N.V.
James N Topper
director
$31k
1,260 shares
+0%
60Notable
NAMSsell 2
NewAmsterdam Pharma Co N.V.
Louise Frederika Kooij
Chief Accounting Officer
$453k
18,073 shares
-55%
45Moderate
NAMSsell 2
NewAmsterdam Pharma Co N.V.
Louise Frederika Kooij
Chief Accounting Officer
$206k
8,269 shares
-36%
68Notable
NAMSsell 2
NewAmsterdam Pharma Co N.V.
Johannes Jacob Pieter Kastelein
Chief Scientific Officer
$2.5M
100,000 shares
-59%
15Weak
NAMSbuy
NewAmsterdam Pharma Co N.V.
James N Topper
director
$11k
471 shares
+0%

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 $2.3M of NAMS | InsiderTell