Belden is trading 11.06% higher at $117.01 in pre-market on October 21, 2026, with no fresh company announcement explaining the move. - Belden closed at $105.35 on October 20. - Belden’s third-quarter results are scheduled before market open on October 29. Recent coverage of its AI data-center business and a hyperscaler contract predates this session; mixed, modest broader-market indicators do not clearly explain the gain.