NewAmsterdam Pharma stock slides on insider sale notices — what investors watch next for NAMS
New York, Jan 5, 2026, 15:21 EST — Regular session Shares of NewAmsterdam Pharma Company N.V. fell about 5% to $33.42 in afternoon trading on Monday. The Nasdaq-listed stock hit an intraday low of $32.68 after opening at $35.15. The move followed two Form 144 filings that signaled planned sales by company affiliates. In smaller biotech names, even routine insider activity can sway short-term sentiment when liquidity is thinner. Form 144 is an SEC notice filed before certain holders sell stock under Rule 144, which governs resales of restricted or “control” shares. The filing does not confirm a sale, but