Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

NewAmsterdam Pharma Co N.V.

NAMS · Nasdaq · CIK 0001936258 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

1 qualifying P purchase group
in the current 180-day scoring window

19 Form 4 transaction lines observed in the same window
9 sales · 9 option, withholding, award, gift or other lines

Last qualifying purchase2026-09-14 · Davidson Michael H. · $226.5K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying1 qualifying line group(s)
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Kooij Louise FrederikaChief Accounting Officer
○▼○▼○▼
Kastelein Johannes Jacob PieterChief Scientific Officer
○▼○▼
Davidson Michael H.Chief Executive Officer
●
Smither John WDirector
▼
Gunning Robert WilliamVice President, Controller
○
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: Davidson Michael H. · $226.5K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-09-14–2026-09-14

Roles in the peak window: Chief Executive Officer. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-09-14 · Davidson Michael H..

Recent Form 4 activity

1Purchases
43Sales
37Other Form 4 lines
28SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING9 sale line(s) · context only
OTHER9 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
19,045,378
Previous report
15,660,444
Avg daily volume
2,028,041
Days to cover
9.4

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14Davidson Michael H.Purchase (P)Ordinary Shares10,000USD 22.65USD 226,500SEC filing ↗
2025-09-15Topper James NPurchase (P)Ordinary Shares660USD 23.70USD 15,642SEC filing ↗
2025-09-08Topper James NPurchase (P)Ordinary Shares1,260USD 24.99USD 31,487SEC filing ↗
2025-08-11Topper James NPurchase (P)Ordinary Shares471USD 23.98USD 11,295SEC filing ↗
2025-06-25Topper James NPurchase (P)Ordinary Shares1,260USD 18.26USD 23,008SEC filing ↗
2025-06-24Topper James NPurchase (P)Ordinary Shares2,520USD 18.43USD 46,444SEC filing ↗
2025-06-16Topper James NPurchase (P)Ordinary Shares8,584USD 19.50USD 167,388SEC filing ↗
2025-03-26Topper James NPurchase (P)Ordinary Shares1,135USD 22.49USD 25,526SEC filing ↗
2025-03-04Topper James NPurchase (P)Ordinary Shares4,005USD 21.02USD 84,185SEC filing ↗
2024-09-26Audet Juliette BerangerePurchase (P)Ordinary Shares1,104USD 15.70USD 17,333SEC filing ↗
2024-08-20Davidson Michael H.Purchase (P)Ordinary Shares5,000USD 16.27USD 81,350SEC filing ↗
2024-06-20Davidson Michael H.Purchase (P)Ordinary Shares5,000USD 17.26USD 86,300SEC filing ↗
2024-03-26Topper James NPurchase (P)Ordinary Shares8,429USD 21.50USD 181,224SEC filing ↗
2024-02-13LANGE LOUIS GPurchase (P)Ordinary Shares5,000USD 19.00USD 95,000SEC filing ↗

Form 4 evidence

81 transaction lines in the latest 365-day window; 200 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Kastelein Johannes Jacob PieterSale (S)Ordinary Shares50,246USD 25.03USD 1,257,657SEC filing ↗
2026-09-30Kastelein Johannes Jacob PieterOption exercise / conversion (M)Ordinary Shares50,246USD —USD —SEC filing ↗
2026-09-14Davidson Michael H.Purchase (P)Ordinary Shares10,000USD 22.65USD 226,500SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Kastelein Johannes Jacob PieterSale (S)Ordinary Shares50,246USD 25.03USD 1,257,657SEC filing ↗
2026-09-30Kastelein Johannes Jacob PieterOption exercise / conversion (M)Ordinary Shares50,246USD —USD —SEC filing ↗
2026-09-14Davidson Michael H.Purchase (P)Ordinary Shares10,000USD 22.65USD 226,500SEC filing ↗
2026-09-04Smither John WSale (S)Ordinary Shares1,600USD 25.32USD 40,512SEC filing ↗
2026-09-01Gunning Robert WilliamAward / grant (A)Ordinary Shares3,200USD 0.00USD 0SEC filing ↗
2026-08-24Kastelein Johannes Jacob PieterSale (S)Ordinary Shares125,000USD 26.91USD 3,363,750SEC filing ↗
2026-08-24Kastelein Johannes Jacob PieterOption exercise / conversion (M)Ordinary Shares125,000USD —USD —SEC filing ↗
2026-07-20Kooij Louise FrederikaSale (S)Ordinary Shares105,000USD 30.34USD 3,185,656SEC filing ↗
2026-07-20Kooij Louise FrederikaOption exercise / conversion (M)Ordinary Shares105,000USD 11.34USD 1,191,100SEC filing ↗
2026-06-22Kooij Louise FrederikaSale (S)Ordinary Shares40,000USD 30.20USD 1,208,159SEC filing ↗
2026-06-22Kooij Louise FrederikaOption exercise / conversion (M)Ordinary Shares40,000USD 11.28USD 451,000SEC filing ↗
2026-05-26Kooij Louise FrederikaSale (S)Ordinary Shares65,000USD 35.69USD 2,319,850SEC filing ↗
2026-05-26Kooij Louise FrederikaOption exercise / conversion (M)Ordinary Shares65,000USD 10.07USD 654,500SEC filing ↗
2026-03-11LANGE LOUIS GSale (S)Ordinary Shares44,619USD 30.42USD 1,357,230SEC filing ↗
2026-03-09LANGE LOUIS GX (X)Ordinary Shares44,619USD 11.50USD 513,118SEC filing ↗
2026-03-09Kastelein Johannes Jacob PieterSale (S)Ordinary Shares101,409USD 30.29USD 3,071,679SEC filing ↗
2026-03-09Kastelein Johannes Jacob PieterOption exercise / conversion (M)Ordinary Shares101,409USD —USD —SEC filing ↗
2026-03-06LANGE LOUIS GSale (S)Ordinary Shares28,186USD 29.41USD 828,950SEC filing ↗
2026-03-06Kastelein Johannes Jacob PieterSale (S)Ordinary Shares94,124USD 30.32USD 2,853,840SEC filing ↗
2026-03-06Kastelein Johannes Jacob PieterOption exercise / conversion (M)Ordinary Shares94,124USD —USD —SEC filing ↗
2026-03-05Kastelein Johannes Jacob PieterSale (S)Ordinary Shares104,467USD 30.30USD 3,165,350SEC filing ↗
2026-03-05Kastelein Johannes Jacob PieterOption exercise / conversion (M)Ordinary Shares104,467USD —USD —SEC filing ↗
2026-03-02Davidson Michael H.Sale (S)Ordinary Shares443,707USD 33.25USD 14,753,258SEC filing ↗
2026-03-02Davidson Michael H.Option exercise / conversion (M)Ordinary Shares443,707USD —USD —SEC filing ↗
2026-02-26Davidson Michael H.Sale (S)Ordinary Shares183,332USD 33.71USD 6,179,974SEC filing ↗
2026-02-26Davidson Michael H.Option exercise / conversion (M)Ordinary Shares183,332USD —USD —SEC filing ↗
2026-02-25Davidson Michael H.Sale (S)Ordinary Shares58,253USD 35.30USD 2,056,174SEC filing ↗
2026-02-25Davidson Michael H.Option exercise / conversion (M)Ordinary Shares58,253USD —USD —SEC filing ↗
2026-02-24Davidson Michael H.Sale (S)Ordinary Shares64,708USD 36.15USD 2,338,943SEC filing ↗
2026-02-24Davidson Michael H.Option exercise / conversion (M)Ordinary Shares64,708USD —USD —SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerNAMS
CIK0001936258
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history200 transaction lines from 2024-02-13 to 2026-09-30
14 P purchase lines · 102 S sale lines · 84 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.