InsiderClue
Stocks · Health care · Pharmaceutical Preparations

NewAmsterdam Pharma Co N.V.

NAMS Clue Score25
Netherlands Fiscal year ends December CIK 0001936258 Results filed 5 Aug 2026
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What the insiders did Net selling

Individual transactions

117
Insider
Date
Role
Action
Shares
Price
Amount
Johannes Jacob Pieter Kastelein
30 Sep 2026
Chief Scientific Officer
Sold after exercise indirect
50,246
$25.03
$1.26M
Michael H. Davidson
14 Sep 2026
Chief Executive Officer
Buy
10,000
$22.65
$226.50K
John W Smither
4 Sep 2026
Director
Sell
1,600
$25.32
$40.51K
Johannes Jacob Pieter Kastelein
24 Aug 2026
Chief Scientific Officer
Sold after exercise indirect
125,000
$26.91
$3.36M
Louise Frederika Kooij
20 Jul 2026
Chief Accounting Officer
Sold after exercise
2,915
$31.71
$92.43K
Louise Frederika Kooij
20 Jul 2026
Chief Accounting Officer
Sold after exercise
31,885
$31.05
$990.03K
Louise Frederika Kooij
20 Jul 2026
Chief Accounting Officer
Sold after exercise
70,200
$29.96
$2.10M
Louise Frederika Kooij
22 Jun 2026
Chief Accounting Officer
Sold after exercise
300
$30.73
$9.22K
Louise Frederika Kooij
22 Jun 2026
Chief Accounting Officer
Sold after exercise
39,700
$30.20
$1.20M
Louise Frederika Kooij
26 May 2026
Chief Accounting Officer
Sold after exercise
65,000
$35.69
$2.32M
Louis G Lange
11 Mar 2026
Director
Sell
446
$31.23
$13.93K
Louis G Lange
11 Mar 2026
Director
Sell
44,173
$30.41
$1.34M
Johannes Jacob Pieter Kastelein
9 Mar 2026
Chief Scientific Officer
Sold after exercise indirect
101,409
$30.29
$3.07M
Louis G Lange
9 Mar 2026
Director
Exercised, kept
44,619
$11.50
$513.12K
Johannes Jacob Pieter Kastelein
6 Mar 2026
Chief Scientific Officer
Sold after exercise indirect
94,124
$30.32
$2.85M
Louis G Lange
6 Mar 2026
Director
Sell indirect
28,186
$29.41
$828.95K
Johannes Jacob Pieter Kastelein
5 Mar 2026
Chief Scientific Officer
Sold after exercise indirect
104,467
$30.30
$3.17M
Michael H. Davidson
2 Mar 2026
Chief Executive Officer
Sold after exercise
443,707
$33.25
$14.75M
Michael H. Davidson
26 Feb 2026
Chief Executive Officer
Sold after exercise
17,924
$34.44
$617.30K
Michael H. Davidson
26 Feb 2026
Chief Executive Officer
Sold after exercise
165,408
$33.63
$5.56M
Michael H. Davidson
25 Feb 2026
Chief Executive Officer
Sold after exercise
1,300
$36.68
$47.68K
Michael H. Davidson
25 Feb 2026
Chief Executive Officer
Sold after exercise
10,436
$35.96
$375.28K
Michael H. Davidson
25 Feb 2026
Chief Executive Officer
Sold after exercise
46,517
$35.11
$1.63M
Michael H. Davidson
24 Feb 2026
Chief Executive Officer
Sold after exercise
3,161
$36.46
$115.25K
Michael H. Davidson
24 Feb 2026
Chief Executive Officer
Sold after exercise
61,547
$36.13
$2.22M
Johannes Jacob Pieter Kastelein
20 Feb 2026
Chief Scientific Officer
Sell
30,789
$35.46
$1.09M
Johannes Jacob Pieter Kastelein
20 Feb 2026
Chief Scientific Officer
Sell
14,692
$35.00
$514.22K
Louise Frederika Kooij
28 Jan 2026
Chief Accounting Officer
Sold after exercise
32,612
$31.80
$1.04M
Louise Frederika Kooij
27 Jan 2026
Chief Accounting Officer
Sold after exercise
39,816
$32.62
$1.30M
Louise Frederika Kooij
26 Jan 2026
Chief Accounting Officer
Sold after exercise
309
$33.45
$10.34K
Louise Frederika Kooij
26 Jan 2026
Chief Accounting Officer
Sold after exercise
34,091
$32.77
$1.12M
Louise Frederika Kooij
23 Jan 2026
Chief Accounting Officer
Sold after exercise
12,767
$34.37
$438.80K
Louise Frederika Kooij
23 Jan 2026
Chief Accounting Officer
Sold after exercise
25,405
$33.44
$849.54K
Mayur Ian Somaiya
21 Jan 2026
Chief Financial Officer
Sold after exercise
24,362
$33.80
$823.44K
Mayur Ian Somaiya
21 Jan 2026
Chief Financial Officer
Sold after exercise
15,422
$33.25
$512.78K
Mayur Ian Somaiya
20 Jan 2026
Chief Financial Officer
Sold after exercise
19,604
$32.38
$634.78K
Mayur Ian Somaiya
20 Jan 2026
Chief Financial Officer
Sold after exercise
39,712
$31.78
$1.26M
Mayur Ian Somaiya
20 Jan 2026
Chief Financial Officer
Sold after exercise
900
$30.64
$27.58K
Michael H. Davidson
7 Jan 2026
Chief Executive Officer
Sold on a plan
11,582
—
no price
Mayur Ian Somaiya
5 Jan 2026
Chief Financial Officer
Sold on a plan
5,118
$33.25
$170.17K
Louise Frederika Kooij
5 Jan 2026
Chief Accounting Officer
Sold on a plan
2,647
$33.25
$88.01K
Johannes Jacob Pieter Kastelein
5 Jan 2026
Chief Scientific Officer
Sold on a plan
6,000
$33.25
$199.50K
Louise Frederika Kooij
26 Dec 2025
Chief Accounting Officer
Sold after exercise
43,872
$35.30
$1.55M
Louise Frederika Kooij
24 Dec 2025
Chief Accounting Officer
Sold after exercise
26,011
$35.68
$928.07K
Louise Frederika Kooij
23 Dec 2025
Chief Accounting Officer
Sold after exercise
75,117
$36.21
$2.72M
James N Topper
15 Sep 2025
Director
Buy indirect
660
$23.70
$15.64K
Louise Frederika Kooij
9 Sep 2025
Chief Accounting Officer
Sold after exercise
96,896
$26.11
$2.53M
Louise Frederika Kooij
9 Sep 2025
Chief Accounting Officer
Sold after exercise
53,104
$25.31
$1.34M
James N Topper
8 Sep 2025
Director
Buy indirect
1,260
$24.99
$31.49K
Louise Frederika Kooij
3 Sep 2025
Chief Accounting Officer
Sell
18,073
$25.09
$453.45K
Louise Frederika Kooij
25 Aug 2025
Chief Accounting Officer
Sell
8,269
$24.86
$205.57K
Johannes Jacob Pieter Kastelein
22 Aug 2025
Chief Scientific Officer
Sell indirect
7,658
$25.49
$195.20K
Johannes Jacob Pieter Kastelein
22 Aug 2025
Chief Scientific Officer
Sell indirect
42,342
$25.08
$1.06M
Johannes Jacob Pieter Kastelein
21 Aug 2025
Chief Scientific Officer
Sell indirect
50,000
$24.29
$1.21M
James N Topper
11 Aug 2025
Director
Buy indirect
471
$23.98
$11.29K
Douglas F Kling
16 Jul 2025
Chief Operating Officer
Sold after exercise
51,043
$21.10
$1.08M
Douglas F Kling
15 Jul 2025
Chief Operating Officer
Sold after exercise
3,544
$22.12
$78.39K
Douglas F Kling
15 Jul 2025
Chief Operating Officer
Sold after exercise
44,025
$21.38
$941.25K
James N Topper
25 Jun 2025
Director
Buy indirect
1,260
$18.26
$23.01K
James N Topper
24 Jun 2025
Director
Buy indirect
2,520
$18.43
$46.45K
James N Topper
16 Jun 2025
Director
Buy indirect
8,584
$19.50
$167.38K
Douglas F Kling
16 Jun 2025
Chief Operating Officer
Sold after exercise
18,109
$19.75
$357.65K
Douglas F Kling
16 Jun 2025
Chief Operating Officer
Sold after exercise
81,891
$19.19
$1.57M
Douglas F Kling
15 May 2025
Chief Operating Officer
Sold after exercise
100,000
—
no price
Douglas F Kling
15 Apr 2025
Chief Operating Officer
Sold after exercise
910
—
no price
Douglas F Kling
15 Apr 2025
Chief Operating Officer
Sold after exercise
99,090
—
no price
Michael H. Davidson
26 Mar 2025
Chief Executive Officer
Sold after exercise
12,258
—
no price
Douglas F Kling
26 Mar 2025
Chief Operating Officer
Sold after exercise
16,539
—
no price
James N Topper
26 Mar 2025
Director
Buy indirect
1,135
$22.49
$25.52K
Douglas F Kling
17 Mar 2025
Chief Operating Officer
Sold after exercise
100,000
—
no price
Louise Frederika Kooij
4 Mar 2025
Chief Accounting Officer
Sold after exercise
150,000
$20.37
$3.06M
James N Topper
4 Mar 2025
Director
Buy indirect
4,005
$21.02
$84.20K
Douglas F Kling
19 Feb 2025
Chief Operating Officer
Sold after exercise
9,218
—
no price
Douglas F Kling
18 Feb 2025
Chief Operating Officer
Sold after exercise
90,782
—
no price
Douglas F Kling
30 Jan 2025
Chief Operating Officer
Sold after exercise
8,914
—
no price
Douglas F Kling
30 Jan 2025
Chief Operating Officer
Sold after exercise
4,664
—
no price
Douglas F Kling
29 Jan 2025
Chief Operating Officer
Sold after exercise
56,863
—
no price
Douglas F Kling
28 Jan 2025
Chief Operating Officer
Sold after exercise
5,148
—
no price
Douglas F Kling
28 Jan 2025
Chief Operating Officer
Sold after exercise
20,237
—
no price
Mayur Ian Somaiya
28 Jan 2025
Chief Financial Officer
Sold after exercise
3,405
—
no price
Mayur Ian Somaiya
28 Jan 2025
Chief Financial Officer
Sold after exercise
11,495
—
no price
Douglas F Kling
27 Jan 2025
Chief Operating Officer
Sold after exercise
23,815
—
no price
Douglas F Kling
27 Jan 2025
Chief Operating Officer
Sold after exercise
80,359
—
no price
Mayur Ian Somaiya
27 Jan 2025
Chief Financial Officer
Sold after exercise
13,304
—
no price
Mayur Ian Somaiya
27 Jan 2025
Chief Financial Officer
Sold after exercise
33,679
—
no price
NAP B.V. ForGrowth
30 Dec 2024
10% owner
Sold on a plan indirect
29,846
$25.54
$762.17K
NAP B.V. ForGrowth
27 Dec 2024
10% owner
Sold on a plan indirect
41,472
$25.95
$1.08M
NAP B.V. ForGrowth
26 Dec 2024
10% owner
Sold on a plan indirect
33,438
$26.01
$869.63K
NAP B.V. ForGrowth
24 Dec 2024
10% owner
Sold on a plan indirect
16,164
$25.66
$414.83K
NAP B.V. ForGrowth
23 Dec 2024
10% owner
Sold on a plan indirect
25,132
$25.49
$640.62K
NAP B.V. ForGrowth
20 Dec 2024
10% owner
Sold on a plan indirect
5,629
$26.13
$147.07K
NAP B.V. ForGrowth
20 Dec 2024
10% owner
Sold on a plan indirect
44,143
$25.53
$1.13M
NAP B.V. ForGrowth
19 Dec 2024
10% owner
Sold on a plan indirect
56,506
$25.45
$1.44M
NAP B.V. ForGrowth
18 Dec 2024
10% owner
Sold on a plan indirect
46,210
$26.55
$1.23M
NAP B.V. ForGrowth
18 Dec 2024
10% owner
Sold on a plan indirect
54,518
$25.72
$1.40M
NAP B.V. ForGrowth
17 Dec 2024
10% owner
Sold on a plan indirect
47,736
$26.45
$1.26M
NAP B.V. ForGrowth
17 Dec 2024
10% owner
Sold on a plan indirect
66,648
$25.60
$1.71M
NAP B.V. ForGrowth
16 Dec 2024
10% owner
Sold on a plan indirect
1,096
$25.00
$27.40K
NAP B.V. ForGrowth
13 Dec 2024
10% owner
Sold on a plan indirect
25,751
$25.01
$644.05K
NAP B.V. ForGrowth
12 Dec 2024
10% owner
Sold on a plan indirect
25,963
$26.18
$679.62K
NAP B.V. ForGrowth
12 Dec 2024
10% owner
Sold on a plan indirect
140,048
$25.25
$3.54M
NAP B.V. ForGrowth
11 Dec 2024
10% owner
Sold on a plan indirect
4,894
$27.11
$132.67K
NAP B.V. ForGrowth
11 Dec 2024
10% owner
Sold on a plan indirect
18,583
$26.41
$490.68K
NAP B.V. ForGrowth
11 Dec 2024
10% owner
Sold on a plan indirect
130,561
$25.26
$3.30M
NAP B.V. ForGrowth
10 Dec 2024
10% owner
Sold on a plan indirect
48,511
$26.15
$1.27M
NAP B.V. ForGrowth
10 Dec 2024
10% owner
Sold on a plan indirect
259,739
$25.22
$6.55M
NAP B.V. ForGrowth
18 Nov 2024
10% owner
Sold on a plan indirect
33,273
$25.08
$834.44K
NAP B.V. ForGrowth
15 Nov 2024
10% owner
Sold on a plan indirect
8,530
$25.02
$213.44K
NAP B.V. ForGrowth
14 Nov 2024
10% owner
Sold on a plan indirect
9,832
$25.01
$245.86K
NAP B.V. ForGrowth
13 Nov 2024
10% owner
Sold on a plan indirect
1,066
$25.00
$26.65K
Louise Frederika Kooij
1 Oct 2024
Chief Accounting Officer
Sell
45,000
$15.72
$707.40K
Juliette Berangere Audet
26 Sep 2024
Chief Business Officer
Buy
1,104
$15.70
$17.33K
Michael H. Davidson
20 Aug 2024
Chief Executive Officer
Buy
5,000
$16.27
$81.35K
Michael H. Davidson
20 Jun 2024
Chief Executive Officer
Buy
5,000
$17.26
$86.31K
Johannes Jacob Pieter Kastelein
26 Mar 2024
Chief Scientific Officer
Sold after exercise indirect
190,476
$21.50
$4.10M
James N Topper
26 Mar 2024
Director
Buy indirect
8,429
$21.50
$181.22K
Louis G Lange
13 Feb 2024
Director
Buy indirect
5,000
$19.00
$95.00K

What was left out

Form 4 filings counted 109
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 10
Sales on a Rule 10b5-1 plan 29
Sales straight out of an exercise 61
Sales at will 12
Transactions with no price 20
Shares from compensation/vesting 4,198,377
History held since 3 Jan 2024