Aeon
Connecting Sign in

Insider trades appear within seconds, the rest within the hour.

Get alerts

← Feed

NAMSNasdaq

NewAmsterdam Pharma Co N.V.

Alert me on NAMS
1
Insider buys, 6 months
0
Congress trades, 6 months
2
Signals, 6 months

Six months

NAMS stock chart by TradingView

After each filing

25
Oct 3 Sale Kastelein Johannes Jacob Pieter Insider
1 week
−6.8%S&P +0.4%
1 month
Result in7 trading days
3 months
Result in49 trading days
6 months
Result in112 trading days
Sep 16 Buy Davidson Michael H. Insider
1 week
+7.1%S&P +2.1%
1 month
−2.6%S&P +2.6%
3 months
Result in36 trading days
6 months
Result in99 trading days
Sep 10 Sale Smither John W Insider
1 week
+0.3%S&P +0.6%
1 month
−1.3%S&P +3.0%
3 months
Result in32 trading days
6 months
Result in95 trading days
Aug 26 Sale Kastelein Johannes Jacob Pieter Insider
1 week
−6.6%S&P −0.1%
1 month
−17.6%S&P +0.9%
3 months
Result in22 trading days
6 months
Result in85 trading days
Jul 23 Sale Kooij Louise Frederika Insider
1 week
−6.8%S&P +0.5%
1 month
−8.8%S&P +3.7%
3 months
−29.7%S&P +5.0%
6 months
Result in61 trading days
Show all 25
Jun 25 Sale Kooij Louise Frederika Insider
1 week
+9.8%S&P +1.4%
1 month
−4.8%S&P +0.7%
3 months
−28.3%S&P +4.7%
6 months
Result in42 trading days
May 28 Sale Kooij Louise Frederika Insider
1 week
−7.8%S&P +0.3%
1 month
−4.4%S&P −1.6%
3 months
−24.4%S&P +2.4%
6 months
Result in23 trading days
Mar 13 Sale LANGE LOUIS G Insider
1 week
+1.1%S&P −1.8%
1 month
+20.3%S&P +5.1%
3 months
+6.2%S&P +12.3%
6 months
−21.9%S&P +15.5%
Mar 11 Sale LANGE LOUIS G Insider
1 week
−6.1%S&P −2.2%
1 month
+10.9%S&P +0.7%
3 months
−6.4%S&P +7.6%
6 months
−30.3%S&P +12.6%
Mar 10 Sale Kastelein Johannes Jacob Pieter Insider
1 week
−2.1%S&P −0.9%
1 month
+12.2%S&P +0.7%
3 months
−2.8%S&P +9.1%
6 months
−27.1%S&P +13.2%
Mar 3 Sale Davidson Michael H. Insider
1 week
+2.8%S&P −0.5%
1 month
+7.9%S&P −3.4%
3 months
+4.3%S&P +12.0%
6 months
−18.0%S&P +12.6%
Feb 27 Sale Davidson Michael H. Insider
1 week
−15.8%S&P −2.0%
1 month
−17.3%S&P −7.6%
3 months
−5.0%S&P +10.6%
6 months
−27.0%S&P +12.7%
Feb 25 Sale Kastelein Johannes Jacob Pieter Insider
1 week
−10.9%S&P −1.2%
1 month
−10.7%S&P −6.7%
3 months
+4.4%S&P +8.6%
6 months
−21.7%S&P +11.1%
Jan 30 Sale Kooij Louise Frederika Insider
1 week
+10.2%S&P −0.2%
1 month
−2.3%S&P −1.7%
3 months
−8.6%S&P +4.4%
6 months
−11.7%S&P +10.1%
Jan 28 Sale Kooij Louise Frederika Insider
1 week
+3.5%S&P −1.3%
1 month
+11.2%S&P −1.4%
3 months
−10.8%S&P +2.6%
6 months
−10.7%S&P +7.2%
Jan 23 Sale Somaiya Mayur Ian Insider
1 week
−6.6%S&P +0.4%
1 month
+8.1%S&P −0.3%
3 months
−10.8%S&P +3.9%
6 months
−9.3%S&P +7.8%
Jan 10 Sale Davidson Michael H. Insider
1 week
−0.9%S&P −2.5%
1 month
+4.7%S&P −0.5%
3 months
+5.4%S&P +0.2%
6 months
−2.2%S&P +9.2%
Jan 8 Sale Kastelein Johannes Jacob Pieter Insider
1 week
−11.1%S&P +0.4%
1 month
−2.2%S&P +0.6%
3 months
−2.9%S&P −1.2%
6 months
−7.0%S&P +9.2%
Jan 8 Sale Somaiya Mayur Ian Insider
1 week
−11.1%S&P +0.4%
1 month
−2.2%S&P +0.6%
3 months
−2.9%S&P −1.2%
6 months
−7.0%S&P +9.2%
Jan 8 Sale Kooij Louise Frederika Insider
1 week
−11.1%S&P +0.4%
1 month
−2.2%S&P +0.6%
3 months
−2.9%S&P −1.2%
6 months
−7.0%S&P +9.2%
Dec 30, 2025 Sale Kooij Louise Frederika Insider
1 week
+2.0%S&P +0.4%
1 month
−10.4%S&P +0.7%
3 months
−5.6%S&P −4.4%
6 months
+0.3%S&P +9.0%
Sep 18, 2025 Buy Topper James N Insider
1 week
−1.6%S&P −0.4%
1 month
+36.2%S&P +0.6%
3 months
+26.0%S&P +1.7%
6 months
+8.3%S&P −1.2%
Sep 11, 2025 Buy Topper James N Insider
1 week
+0.5%S&P +0.7%
1 month
+39.3%S&P −0.4%
3 months
+33.9%S&P +4.8%
6 months
+7.6%S&P +1.3%
Sep 11, 2025 Sale Kooij Louise Frederika Insider
1 week
+0.5%S&P +0.7%
1 month
+39.3%S&P −0.4%
3 months
+33.9%S&P +4.8%
6 months
+7.6%S&P +1.3%
Sep 6, 2025 Sale Kooij Louise Frederika Insider
1 week
−3.9%S&P +1.9%
1 month
+28.4%S&P +3.4%
3 months
+40.5%S&P +6.0%
6 months
+24.6%S&P +5.0%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for NAMS

65 held · newest 565 held · newest 2
Loading the filings.
See all 65 filings for NAMS

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal
No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters
No lobbying reports on file.