Kastelein Johannes Jacob Pieter Insider Trading Activity

Average Profitability
<0.0001%
Insider Buys Quantity
0
Insider Buys Sum
$0
Insider Sells Quantity
1
Insider Sells Sum
$4.1M

Insider Activity of Kastelein Johannes Jacob Pieter

According to the SEC Form 4 filings, Kastelein Johannes Jacob Pieter, being in a position of

  1. Chief Scientific Officer at NewAmsterdam Pharma Company N.V.,
    оver the last 12 months, has bought 0 shares, and sold 526727 shares for $15.52M,
    over all time since 2024-03-26, has bought 0 shares, and sold 817203 shares for $22.08M.

Biography of Kastelein Johannes Jacob Pieter

No biography is available at this moment.

Statistics of Insider Transactions Last Year

Amount of Insider Buys and Sells by Stocks

Buys
 $000
Sells
 $15,517,7747100

Comparison of Insiders on Amount of Buys and Sells

2026-09-30SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
50,246
0.0442%
$25.03$1.26M-14%
2026-08-24SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
125,000
0.1015%
$26.91$3.36M-16.89%
2026-03-09SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
101,409
0.0895%
$30.29$3.07M-3.14%
2026-03-06SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
94,124
0.0831%
$30.32$2.85M-0.13%
2026-03-05SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
104,467
0.0914%
$30.30$3.17M-1.05%
2026-02-20SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
45,481
0.0398%
$35.31$1.61M-15.74%
2026-01-05SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
6,000
0.0053%
$33.25$199,500-8.09%
2025-08-22SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
50,000
0.0446%
$25.14$1.26M+31.38%
2025-08-21SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
50,000
0.0441%
$24.29$1.21M+34.33%
2024-03-26SaleNewAmsterdam Pharma Company N.V.
NAMS
Chief Scientific Officer
190,476
0.2233%
$21.50$4.1M-13.27%
Total: 10
Company
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