Insider trading

Period: 12 months Stock: NAMS Type of trade: Sold × Share of holding: 50% or more × + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

19 decisions over 12 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

19 decisions over 12 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

19 decisions over 12 months Remove this filter
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

19 decisions over 12 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
19 decisions over 12 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
19 decisions over 12 months Remove this filter
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

19 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
24 Aug 2026
Kastelein Johannes Jacob Pieter Chief Scientific Officer · indirect
Sold on a plan
$3.36M 125,000 at 26.91
64.3%
Sold half or more
20 Jul 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan 3×
$3.19M 105,000 at 30.34
81.2%
Sold half or more
22 Jun 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan 2×
$1.21M 40,000 at 30.20
62.2%
Sold half or more
26 May 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan
$2.32M 65,000 at 35.69
72.7%
Sold half or more
11 Mar 2026
LANGE LOUIS G Director
Sold at will 2×
$1.36M 44,619 at 30.42
81.2%
Sold half or more
9 Mar 2026
Kastelein Johannes Jacob Pieter Chief Scientific Officer · indirect
Sold on a plan
$3.07M 101,409 at 30.29
59.4%
Sold half or more
6 Mar 2026
Kastelein Johannes Jacob Pieter Chief Scientific Officer · indirect
Sold on a plan
$2.85M 94,124 at 30.32
57.6%
Sold half or more
6 Mar 2026
LANGE LOUIS G Director · indirect
Sold at will
$828.95K 28,186 at 29.41
100%
Sold half or more
5 Mar 2026
Kastelein Johannes Jacob Pieter Chief Scientific Officer · indirect
Sold on a plan
$3.17M 104,467 at 30.30
60.1%
Sold half or more
2 Mar 2026
Davidson Michael H. Chief Executive Officer
Sold at will
$14.75M 443,707 at 33.25
71.8%
Sold half or more
26 Feb 2026
Davidson Michael H. Chief Executive Officer
Sold on a plan 2×
$6.18M 183,332 at 33.71
51.3%
Sold half or more
28 Jan 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan
$1.04M 32,612 at 31.80
57.2%
Sold half or more
27 Jan 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan
$1.30M 39,816 at 32.62
62.0%
Sold half or more
26 Jan 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan 2×
$1.13M 34,400 at 32.78
58.6%
Sold half or more
23 Jan 2026
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan 2×
$1.29M 38,172 at 33.75
61.1%
Sold half or more
20 Jan 2026
Somaiya Mayur Ian Chief Financial Officer
Sold on a plan 3×
$1.92M 60,216 at 31.96
50.8%
Sold half or more
26 Dec 2025
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan
$1.55M 43,872 at 35.30
74.5%
Sold half or more
24 Dec 2025
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan
$928.07K 26,011 at 35.68
63.4%
Sold half or more
23 Dec 2025
Kooij Louise Frederika Chief Accounting Officer
Sold on a plan
$2.72M 75,117 at 36.21
83.4%
Sold half or more
Showing 1–19 of 19.