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NAMS · NewAmsterdam Pharma Co N.V.

Healthcare · −3.8% on Oct 16

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Updated Oct 17 · 7 feeds behind: FDA drug approvals, 3 days, and 6 more · Every feed →

On this page

The market view

Price chart

The interactive NAMS chart (by TradingView) loads here.

Our take

3 rules fired on NAMS

In short: none of these rules has solid or some evidence yet, so they show no clear lean on NAMS.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

The 0–100 score for NAMS, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on NAMS, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
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Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of NAMS. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 22, 2026–Oct 19, 2026 · UTC dates · today is excluded

Insider sales

Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual.

Latest 28 days
1
Earlier median
1
Earlier range
0–2
Distinct filers per 28 daysScale: 0–2
Oct 21, 2025Oct 19, 2026
Earlier periodsLatest 28 daysEarlier median 1Limited or missing history

Who appears in the latest period?

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Jun 24, 2026. Newest disclosure across this feed: Oct 16, 2026.

Earlier periods in the comparison: 3. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–1.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 20260Partial; excluded
Jun 30, 2026–Jul 27, 20260Within stored history
Jul 28, 2026–Aug 24, 20260Within stored history
Aug 25, 2026–Sep 21, 20261Within stored history
Sep 22, 2026–Oct 19, 2026Latest period0Within stored history
Insider sales · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 1; range: 0–2.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 20261Partial; excluded
Jun 30, 2026–Jul 27, 20261Within stored history
Jul 28, 2026–Aug 24, 20260Within stored history
Aug 25, 2026–Sep 21, 20262Within stored history
Sep 22, 2026–Oct 19, 2026Latest period1Within stored history
Congress purchases · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 2026—Unavailable
Jun 30, 2026–Jul 27, 2026—Unavailable
Jul 28, 2026–Aug 24, 2026—Unavailable
Aug 25, 2026–Sep 21, 2026—Unavailable
Sep 22, 2026–Oct 19, 2026Latest period—Unavailable
Congress sales · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 2026—Unavailable
Jun 30, 2026–Jul 27, 2026—Unavailable
Jul 28, 2026–Aug 24, 2026—Unavailable
Aug 25, 2026–Sep 21, 2026—Unavailable
Sep 22, 2026–Oct 19, 2026Latest period—Unavailable
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Insiders

Insiders · Oct 2026

  1. Disclosed
    Johannes Jacob Pieter Kastelein · Sale

    Transaction dated Sep 30, 2026

All 9 records in this snapshot
  1. Disclosed
    Johannes Jacob Pieter Kastelein · Sale

    Transaction dated Sep 30, 2026

  2. Disclosed
    Michael H. Davidson · Purchase

    Transaction dated Sep 14, 2026

  3. Disclosed
    John W Smither · Sale

    Transaction dated Sep 4, 2026

  4. Disclosed
    Johannes Jacob Pieter Kastelein · Sale

    Transaction dated Aug 24, 2026

  5. Disclosed
    Louise Frederika Kooij · Sale

    Transaction dated Jul 20, 2026

  6. Disclosed
    Louise Frederika Kooij · Sale

    Transaction dated Jul 20, 2026

  7. Disclosed
    Louise Frederika Kooij · Sale

    Transaction dated Jul 20, 2026

  8. Disclosed
    Louise Frederika Kooij · Sale

    Transaction dated Jun 22, 2026

  9. Disclosed
    Louise Frederika Kooij · Sale

    Transaction dated Jun 22, 2026

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on NAMS disclosed in the last 90 days.

See every Congress trade on NAMS →

Company insiders

1 buy · 4 sells (7 filed lots) · $7.8M sold · $227K bought

  1. ▼ SELLJohannes Jacob Pieter Kastelein Chief Scientific OfficerNAMS NewAmsterdam Pharma Co N.V.$1.3Mdisclosed Oct 2 · filed 2 days after the trade
  2. ▲ BUYMichael H. Davidson Chief Executive OfficerNAMS NewAmsterdam Pharma Co N.V.$227Kdisclosed Sep 15 · filed 1 day after the trade
  3. ▼ SELLJohn W Smither DirectorNAMS NewAmsterdam Pharma Co N.V.$40.5Kdisclosed Sep 9 · filed 5 days after the trade · late
  4. ▼ SELLJohannes Jacob Pieter Kastelein Chief Scientific OfficerNAMS NewAmsterdam Pharma Co N.V.$3.4Mdisclosed Aug 25 · filed 1 day after the trade
  5. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$990Kdisclosed Jul 22 · filed 2 days after the trade
  6. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$2.1Mdisclosed Jul 22 · filed 2 days after the trade
  7. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$92.4Kdisclosed Jul 22 · filed 2 days after the trade
See every insider trade on NAMS →

Filings & events

Biggest named funds (13F)

The largest NAMS holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on NAMS

  1. ▼ SELLJohannes Jacob Pieter Kastelein Chief Scientific OfficerNAMS NewAmsterdam Pharma Co N.V.$1.3Mdisclosed Oct 2 · filed 2 days after the trade
  2. ▲ BUYMichael H. Davidson Chief Executive OfficerNAMS NewAmsterdam Pharma Co N.V.$227Kdisclosed Sep 15 · filed 1 day after the trade
  3. ▼ SELLJohn W Smither DirectorNAMS NewAmsterdam Pharma Co N.V.$40.5Kdisclosed Sep 9 · filed 5 days after the trade · late
  4. ▼ SELLJohannes Jacob Pieter Kastelein Chief Scientific OfficerNAMS NewAmsterdam Pharma Co N.V.$3.4Mdisclosed Aug 25 · filed 1 day after the trade
  5. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$990Kdisclosed Jul 22 · filed 2 days after the trade
  6. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$2.1Mdisclosed Jul 22 · filed 2 days after the trade
  7. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$92.4Kdisclosed Jul 22 · filed 2 days after the trade
  8. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$9.2Kdisclosed Jun 24 · filed 2 days after the trade
  9. ▼ SELLLouise Frederika Kooij Chief Accounting OfficerNAMS NewAmsterdam Pharma Co N.V.$1.2Mdisclosed Jun 24 · filed 2 days after the trade
See the trades on NAMS in the feed →
People & votes

Which members of Congress traded NAMS, sponsored bills that touch it and voted on them — opens here.