Regeneron Pharmaceuticals closed at $930.67 on Nov 4, down 4.39%, 4.4% below its 52-week closing high. Volume of 1.4M shares was 1.70× its 20-day average (above normal).
Split-adjusted performance: +26.0% over one month, +29.1% over six months, +44.9% over one year.
In the quarter ended Sep 30, 2026, revenue was $5.12B, up 36.3% from a year earlier, with a net margin of 38.1%.
Short interest was 2.1M shares at the Oct 15 settlement (2.2% of float, 3.2 days to cover).