Belden is trading 18.9% up at $131.80 after a sharp after-hours move, with no confirmed September 18 company-specific catalyst identified.

  • Belden closed September 18 at $110.89.
  • Recent coverage instead references earlier second-quarter results, the completed RUCKUS acquisition, and an insider saleβ€”not a new late-session announcement.
  • Broader indexes were only modestly higher, so the move remains unexplained.