NASDAQ:NAMSW

Newamsterdam Pharma Company N.v Stock Insider Trading

Healthcare > Biotechnology

Buy NAMSW

*Your capital is at risk

$20.70

+0 (+0%)

At Close: Jun 03, 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 -71.47. In total, the insiders bought 4.26M and sold 1.75M NAMSW 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)	-71.47
● Buy	4.26M shares
● Sell	1.75M shares
63% 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 -71.47. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Jan 07, 2026 Buy	Ordinary Shares A-Award	Kooij Louise Frederika Chief Accounting Officer	Officer	12 000 Value: $286.6K
Jan 07, 2026 Buy	Option (right to buy) A-Award	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	115 000 Value: $4.08M
Jan 07, 2026 Buy	Ordinary Shares A-Award	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	25 500 Value: $608.9K
Jan 07, 2026 Buy	Option (right to buy) A-Award	Kooij Louise Frederika Chief Accounting Officer	Officer	53 500 Value: $1.90M
Jan 07, 2026 Buy	Option (right to buy) A-Award	Somaiya Mayur Ian Chief Financial Officer	C-Suite Officer	115 000 Value: $4.08M
Jan 07, 2026 Buy	Ordinary Shares A-Award	Somaiya Mayur Ian Chief Financial Officer	C-Suite Officer	25 500 Value: $608.9K
Jan 05, 2026 Sell	Ordinary Shares S-Sale	Somaiya Mayur Ian Chief Financial Officer	C-Suite Officer	5 118 Value: $170.2K
Jan 05, 2026 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	2 647 Value: $88.0K
Jan 05, 2026 Sell	Ordinary Shares S-Sale	Kastelein Johannes Jacob Pieter Chief Scientific Officer	Officer	6 000 Value: $199.5K
Dec 26, 2025 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	38 872 Value: $388.7K
Dec 26, 2025 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	5 000 Value: $54.5K
Dec 26, 2025 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	38 872 Value: $388.7K
Dec 26, 2025 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	5 000 Value: $54.5K
Dec 26, 2025 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	43 872 Value: $1.55M
Dec 24, 2025 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	26 011 Value: $260.1K
Dec 24, 2025 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	26 011 Value: $260.1K
Dec 24, 2025 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	26 011 Value: $928.1K
Dec 23, 2025 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	75 117 Value: $751.2K
Dec 23, 2025 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	75 117 Value: $751.2K
Dec 23, 2025 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	75 117 Value: $2.72M
Sep 15, 2025 Buy	Ordinary Shares P-Purchase	Topper James N Director	Director	660 Value: $15.6K
Sep 15, 2025 Buy	Ordinary Shares P-Purchase	Topper James N Director	Director	660 Value: $15.6K
Sep 09, 2025 Buy	Option (right to buy) M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	150 000 Value: $1.50M
Sep 09, 2025 Buy	Ordinary Shares M-Exempt	Kooij Louise Frederika Chief Accounting Officer	Officer	150 000 Value: $1.50M
Sep 09, 2025 Sell	Ordinary Shares S-Sale	Kooij Louise Frederika Chief Accounting Officer	Officer	53 104 Value: $1.34M

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