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NewAmsterdam Pharma Co N.V.

NAMS Net selling
CIK 0001936258 #1687 in the set updated 17 Sep 2026
Bought (120 mo)
$1.09M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$110.91M
$30.48M on a plan · $72.76M straight out of an exercise
Sold at will
$7.67M
12 of 101 sales
Net
−$109.81M
−$6.58M against sales at will

By person

17 insiders · 116 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
ForGrowth NAP B.V.
10% owner
—
$30.02M (25) scheduled
−$30.02M
10,656,172
8.91%
$241.36M
−9.9%
Kooij Louise Frederika
Chief Accounting Officer
—
$25.05M (22) scheduled
−$25.05M
24,353
0.0204%
$551.60K
—
Davidson Michael H.
Chief Executive Officer
$394.16K (3)
$25.33M (10) scheduled
−$24.93M
1,078,638
0.9023%
$24.43M
+33.4%
Kastelein Johannes Jacob Pieter
Chief Scientific Officer
—
$20.83M (11) scheduled
−$20.83M
122,802
0.1027%
$2.78M
—
Kling Douglas F
Chief Operating Officer
—
$4.03M (19) scheduled
−$4.03M
44,000
0.0368%
$996.60K
—
Somaiya Mayur Ian
Chief Financial Officer
—
$3.43M (10) scheduled
−$3.43M
58,382
0.0488%
$1.32M
—
LANGE LOUIS G
Director
$95.00K (1)
$2.19M (3)
−$2.09M
10,360
0.0087%
$234.65K
−47.9%
Topper James N
Director
$586.21K (9)
—
+$586.21K
3,028,524
2.53%
$68.60M
+0.9%
Smither John W
Director
—
$40.51K (1)
−$40.51K
8,760
0.0073%
$198.41K
—
Audet Juliette Berangere
See Remarks
$17.33K (1)
—
+$17.33K
15,104
0.0126%
$342.11K
—
Marino Michael F III
See Remarks
—
—
—
55,000
0.0460%
$1.25M
—
JONES WILLIAM A JR
Chief Commercial Officer
—
—
—
43,000
0.0360%
$973.95K
—
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
—
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

29
Insider
Date
Role
Action
Shares
Price
Amount
Davidson Michael H.
7 Jan 2026
Chief Executive Officer
Sold on a plan
11,582
—
no price
Somaiya Mayur Ian
5 Jan 2026
Chief Financial Officer
Sold on a plan
5,118
$33.25
$170.17K
Kooij Louise Frederika
5 Jan 2026
Chief Accounting Officer
Sold on a plan
2,647
$33.25
$88.01K
Kastelein Johannes Jacob Pieter
5 Jan 2026
Chief Scientific Officer
Sold on a plan
6,000
$33.25
$199.50K
ForGrowth NAP B.V.
30 Dec 2024
10% owner
Sold on a plan indirect
29,846
$25.54
$762.17K
ForGrowth NAP B.V.
27 Dec 2024
10% owner
Sold on a plan indirect
41,472
$25.95
$1.08M
ForGrowth NAP B.V.
26 Dec 2024
10% owner
Sold on a plan indirect
33,438
$26.01
$869.63K
ForGrowth NAP B.V.
24 Dec 2024
10% owner
Sold on a plan indirect
16,164
$25.66
$414.83K
ForGrowth NAP B.V.
23 Dec 2024
10% owner
Sold on a plan indirect
25,132
$25.49
$640.62K
ForGrowth NAP B.V.
20 Dec 2024
10% owner
Sold on a plan indirect
5,629
$26.13
$147.07K
ForGrowth NAP B.V.
20 Dec 2024
10% owner
Sold on a plan indirect
44,143
$25.53
$1.13M
ForGrowth NAP B.V.
19 Dec 2024
10% owner
Sold on a plan indirect
56,506
$25.45
$1.44M
ForGrowth NAP B.V.
18 Dec 2024
10% owner
Sold on a plan indirect
46,210
$26.55
$1.23M
ForGrowth NAP B.V.
18 Dec 2024
10% owner
Sold on a plan indirect
54,518
$25.72
$1.40M
ForGrowth NAP B.V.
17 Dec 2024
10% owner
Sold on a plan indirect
47,736
$26.45
$1.26M
ForGrowth NAP B.V.
17 Dec 2024
10% owner
Sold on a plan indirect
66,648
$25.60
$1.71M
ForGrowth NAP B.V.
16 Dec 2024
10% owner
Sold on a plan indirect
1,096
$25.00
$27.40K
ForGrowth NAP B.V.
13 Dec 2024
10% owner
Sold on a plan indirect
25,751
$25.01
$644.05K
ForGrowth NAP B.V.
12 Dec 2024
10% owner
Sold on a plan indirect
25,963
$26.18
$679.62K
ForGrowth NAP B.V.
12 Dec 2024
10% owner
Sold on a plan indirect
140,048
$25.25
$3.54M
ForGrowth NAP B.V.
11 Dec 2024
10% owner
Sold on a plan indirect
4,894
$27.11
$132.67K
ForGrowth NAP B.V.
11 Dec 2024
10% owner
Sold on a plan indirect
18,583
$26.41
$490.68K
ForGrowth NAP B.V.
11 Dec 2024
10% owner
Sold on a plan indirect
130,561
$25.26
$3.30M
ForGrowth NAP B.V.
10 Dec 2024
10% owner
Sold on a plan indirect
48,511
$26.15
$1.27M
ForGrowth NAP B.V.
10 Dec 2024
10% owner
Sold on a plan indirect
259,739
$25.22
$6.55M
ForGrowth NAP B.V.
18 Nov 2024
10% owner
Sold on a plan indirect
33,273
$25.08
$834.44K
ForGrowth NAP B.V.
15 Nov 2024
10% owner
Sold on a plan indirect
8,530
$25.02
$213.44K
ForGrowth NAP B.V.
14 Nov 2024
10% owner
Sold on a plan indirect
9,832
$25.01
$245.86K
ForGrowth NAP B.V.
13 Nov 2024
10% owner
Sold on a plan indirect
1,066
$25.00
$26.65K
Show all 116 transactions →

What was left out

Form 4 filings counted 108
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 60
Sales at will 12
Transactions with no price 20
Shares from compensation/vesting 4,148,131
History held since 3 Jan 2024