Kastelein Johannes Jacob Pieter Insider Trades

Insider Trading History

Track insider trading activity for Kastelein Johannes Jacob Pieter. See latest buy and sell transactions across all companies.

Holdings

Company
Holding Value
Last Transaction
Sale/Purchase
Amount
Price
Current Price

Insider Trades History

Company
Holding Value
Last Transaction
Sale/Purchase
Amount
Price
Current Price
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $1.48M 69,302 shares
Last Trade
Mar 09, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$1.87M 101,409 shares
$18.45
$21.31
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $11.1M 520,229 shares
Last Trade
Mar 09, 2026 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$1.87M 101,409 shares
$18.45
$21.31
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $2.26M 69,302 shares
Last Trade
Mar 09, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$3.07M 101,409 shares
$30.29
$32.67
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $5.58M 170,711 shares
Last Trade
Mar 09, 2026 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$3.12M 101,409 shares
$30.77
$32.67
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $17M 520,229 shares
Last Trade
Mar 09, 2026 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$3.12M 101,409 shares
$30.77
$32.67
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $3.64M 170,711 shares
Last Trade
Mar 09, 2026 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$1.87M 101,409 shares
$18.45
$21.31
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $13.2M 621,638 shares
Last Trade
Mar 06, 2026 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$1.75M 94,124 shares
$18.60
$21.31
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $2.26M 69,302 shares
Last Trade
Mar 06, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$2.85M 94,124 shares
$30.32
$32.67
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $3.48M 163,426 shares
Last Trade
Mar 06, 2026 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$1.75M 94,124 shares
$18.60
$21.31
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $20.3M 621,638 shares
Last Trade
Mar 06, 2026 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$2.81M 94,124 shares
$29.86
$32.67
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $5.34M 163,426 shares
Last Trade
Mar 06, 2026 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$2.81M 94,124 shares
$29.86
$32.67
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $1.48M 69,302 shares
Last Trade
Mar 06, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$1.75M 94,124 shares
$18.60
$21.31
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $3.7M 173,769 shares
Last Trade
Mar 05, 2026 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$1.99M 104,467 shares
$19.01
$21.31
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $2.26M 69,302 shares
Last Trade
Mar 05, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$3.17M 104,467 shares
$30.30
$32.67
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $5.68M 173,769 shares
Last Trade
Mar 05, 2026 Purchase (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$3.15M 104,467 shares
$30.12
$32.67
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $15.3M 715,762 shares
Last Trade
Mar 05, 2026 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$1.99M 104,467 shares
$19.01
$21.31
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $23.4M 715,762 shares
Last Trade
Mar 05, 2026 Sale (Option Exercise)Shares acquired or sold by exercising stock options or converting another derivative security.
$3.15M 104,467 shares
$30.12
$32.67
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $1.48M 69,302 shares
Last Trade
Mar 05, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$1.99M 104,467 shares
$19.01
$21.31
NewAmsterdam Pharma Company NV
NewAmsterdam Pharma Company NV NAMS
Chief Scientific Officer
Holding Value $2.75M 84,289 shares
Last Trade
Feb 20, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$1.61M 45,481 shares
$35.31
$32.67
NewAmsterdam Pharma Company NV - Warrants (15/11/2027)
NewAmsterdam Pharma Company NV - Warrants (15/11/2027) NAMSW
Chief Scientific Officer
Holding Value $1.8M 84,289 shares
Last Trade
Feb 20, 2026 Sale (Open Market)Shares sold on the open market or in a private sale.
$1.18M 45,481 shares
$25.97
$21.31

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