NASDAQ:NAMS

Newamsterdam Pharma Company N.v Stock Insider Trading

Healthcare > Biotechnology

Buy NAMS

*Your capital is at risk

$33.28

-1.98 (-5.62%)

At Close: Jul 13, 2026

Newamsterdam Pharma Company N.v Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -66.21. In total, the insiders bought 4.01M and sold 1.73M NAMS shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-66.21
● Buy	4.01M shares
● Sell	1.73M shares
62% Buy Activity Moderate Negative Correlation
Buy Signal Low Confidence Jan 07, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -66.21. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Jun 22, 2026 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	39 700 Value: $1.20M
Jun 22, 2026 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	15 000 Value: $178.5K
Jun 22, 2026 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	15 000 Value: $178.5K
Jun 22, 2026 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	25 000 Value: $272.5K
Jun 22, 2026 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	25 000 Value: $272.5K
Jun 22, 2026 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	300 Value: $9K
May 26, 2026 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	60 000 Value: $600.0K
May 26, 2026 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	60 000 Value: $600.0K
May 26, 2026 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	5 000 Value: $54.5K
May 26, 2026 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	5 000 Value: $54.5K
May 26, 2026 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	65 000 Value: $2.32M
Mar 11, 2026 Sell	Ordinary Shares S-Sale	Lange Louis G Director	Director	446 Value: $13.9K
Mar 11, 2026 Sell	Ordinary Shares S-Sale	Lange Louis G Director	Director	44 173 Value: $1.34M
Mar 09, 2026 Sell	Warrant (right to buy) X-InTheMoney	Lange Louis G Director	Director	44 619 Value: $513.1K
Mar 09, 2026 Buy	Ordinary Shares X-InTheMoney	Lange Louis G Director	Director	44 619 Value: $513.1K
Mar 09, 2026 Buy	Ordinary Shares M-Exempt	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	101 409 Value: $3.12M
Mar 09, 2026 Buy	Option (right to buy) M-Exempt	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	101 409 Value: $3.12M
Mar 09, 2026 Sell	Ordinary Shares S-Sale	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	101 409 Value: $3.07M
Mar 06, 2026 Sell	Ordinary Shares S-Sale	Lange Louis G Director	Director	28 186 Value: $829.0K
Mar 06, 2026 Sell	Ordinary Shares S-Sale	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	94 124 Value: $2.85M
Mar 06, 2026 Buy	Option (right to buy) M-Exempt	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	94 124 Value: $2.81M
Mar 06, 2026 Buy	Ordinary Shares M-Exempt	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	94 124 Value: $2.81M
Mar 05, 2026 Buy	Ordinary Shares M-Exempt	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	104 467 Value: $3.15M
Mar 05, 2026 Sell	Ordinary Shares S-Sale	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	104 467 Value: $3.17M
Mar 05, 2026 Buy	Option (right to buy) M-Exempt	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	104 467 Value: $3.15M

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks