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NewAmsterdam Pharma Co N.V.

NAMS Net buying

CIK 0001936258 #1687 in the set updated 17 Sep 2026

Bought (1 mo)

$226.50K

out of their own pocket, the only kind of buying there is

Sold (1 mo)

$3.40M

$0.00 on a plan · $3.36M straight out of an exercise

Sold at will

$40.51K

1 of 2 sales

Net

−$3.18M

+$185.99K against sales at will

By person

17 insiders · 3 transactions

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

Kastelein Johannes Jacob Pieter

Chief Scientific Officer

—

$3.36M (1) scheduled

−$3.36M

122,802

0.1027%

$2.78M

—

Davidson Michael H.

Chief Executive Officer

$226.50K (1)

—

+$226.50K

1,078,638

0.9023%

$24.43M

+31.8%

Smither John W

Director

—

$40.51K (1)

−$40.51K

8,760

0.0073%

$198.41K

—

ForGrowth NAP B.V.

10% owner

—

10,656,172

8.91%

$241.36M

−9.9%

Topper James N

Director

—

3,028,524

2.53%

$68.60M

+0.7%

Somaiya Mayur Ian

Chief Financial Officer

—

58,382

0.0488%

$1.32M

—

Marino Michael F III

See Remarks

—

55,000

0.0460%

$1.25M

—

Kling Douglas F

Chief Operating Officer

—

44,000

0.0368%

$996.60K

—

JONES WILLIAM A JR

Chief Commercial Officer

—

43,000

0.0360%

$973.95K

—

Kooij Louise Frederika

Chief Accounting Officer

—

24,353

0.0204%

$551.60K

—

Audet Juliette Berangere

See Remarks

—

15,104

0.0126%

$342.11K

—

Gulfo Adele M.

Director

—

14,260

0.0119%

$322.99K

—

Lewis William

Director

—

10,360

0.0087%

$234.65K

—

McKenna Mark C.

Director

—

10,360

0.0087%

$234.65K

—

LANGE LOUIS G

Director

—

10,360

0.0087%

$234.65K

−58.4%

van der Kamp Hilde Johanna

Director

—

10,360

0.0087%

$234.65K

—

Gunning Robert William

Vice President, Controller

—

3,200

0.0027%

$72.48K

—

Individual transactions

Insider

Date

Role

Action

Price

Amount

Smither John W

4 Sep 2026

Director

Sell

1,600

$25.32

$40.51K

Show all 3 transactions →

What was left out

Form 4 filings counted 4

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 0

Sales on a Rule 10b5-1 plan 0

Sales straight out of an exercise 1

Sales at will 1

Transactions with no price 0

Shares from compensation/vesting 128,200

History held since 3 Jan 2024