Newamsterdam Pharma Co N.V. insider trading
Every open-market purchase and sale by Newamsterdam Pharma Co N.V.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.
| Date | Insider | Trade | Shares | Price | Value | 1M after | 3M after | 6M after |
|---|
Does following Newamsterdam Pharma Co N.V.’s insiders pay?
From February 21, 2024 to September 15, 2026, 7 insiders reported 13 open-market purchases and 12 sales not made under a pre-set plan in Newamsterdam Pharma Co N.V. Twelve months after each purchase was reported, the shares were +8.0% against the S&P 500 on average (median −0.9%), over 12 purchases with a full year of prices; 50% beat the index. After sales, the shares moved −6.0% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on February 22, 2024 into $9,077 by November 2, 2026, −3.5% a year. It held shares 100% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $15,394 (+17.4% a year), and held throughout $15,394 (+17.4%).
| Insider | Role | Purchases | 12 months after their purchases | Beat the S&P 500 | Sales | 12 months after their sales | Latest report |
|---|---|---|---|---|---|---|---|
| Topper James N | Director | 8 | +7.3% (8) | 50% | 0 | — | September 17, 2025 |
| Kooij Louise Frederika | Chief Accounting Officer | 0 | — | — | 5 | +0.7% (5) | September 10, 2025 |
| Davidson Michael H. | Chief Executive Officer | 3 | +7.1% (2) | 50% | 1 | — | September 15, 2026 |
| Kastelein Johannes Jacob Pieter | Chief Scientific Officer | 0 | — | — | 3 | −22.7% (2) | February 24, 2026 |
| Lange Louis G | Director | 1 | −35.6% (1) | 0% | 2 | — | March 12, 2026 |
| Audet Juliette Berangere | Chief Business Officer | 1 | +58.3% (1) | 100% | 0 | — | September 30, 2024 |
| Smither John W | Director | 0 | — | — | 1 | — | September 9, 2026 |
When several insiders traded Newamsterdam Pharma Co N.V.
Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Newamsterdam Pharma Co N.V. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 2 buying crowds with six months of prices, it averaged −8.5% against the index. After 1 selling crowd, −41.9%. One company's history is too short to judge by; the test across every company is the better guide.
| Month | Crowd | 3 months on, vs S&P 500 | 6 months | 12 months |
|---|---|---|---|---|
| March 31, 2026 | 3 selling | −5.1% | −41.9% | not yet |
| October 31, 2024 | 2 buying | +17.9% | +12.7% | +94.4% |
| April 30, 2024 | 2 buying | −31.6% | −29.6% | −22.5% |