Regeneron Pharmaceuticals is trading at $973.75, up 4.63%, in pre-market, with the move most consistent with supportive biotech-sector sentiment.

  • Amgen’s raised full-year outlook helped lift the sector backdrop. No clear new Regeneron-specific catalyst surfaced; the recent earnings beat and analyst target changes predate November 5.
  • Regeneron closed down 4.39% on November 4. Premarket volume or activity-level details were not available in the supplied price context.